研究業績


本論文

  • Anisotropic BT Phase Diagram of Non-Kramers System PrRh2Zn20
    T. Yoshida, Y. Machida, K. Izawa, Y. Shimada, N. Nagasawa, T. Onimaru, T. Takabatake, A. Gourgout, A. Pourret, G. Knebel, and J.-P. Brison, J. Phys. Soc. Jpn. 86, 044711 1-10(2017).
    DOI:10.7566/JPSJ.86.044711
  • Quadrupole-driven non-Fermi-liquid and magnetic-field-induced heavy fermion states in a non-Kramers doublet system
    T. Onimaru, K. Izawa, K. T. Matsumoto, T. Yoshida, Y. Machida, T. Ikeura, K. Wakiya, K. Umeo, S. Kittaka, K. Araki, T. Sakakibara, and T. Takabatake, Phys. Rev. B 94, 075134 1-8(2016).
    DOI:10.1103/PhysRevB.94.075134
  • Locating Horizontal Line of Zero on the Fermi Surface
    K. Izawa, JPSJ News and Comments 13,02(2016).
    DOI:10.7566/JPSJNC.13.02
  • Colossal Seebeck Coefficient of Hopping Electrons in (TMTSF)2PF6
    Y. Machida, X. Lin, W. Kang, K. Izawa, and K. Behnia, Phys. Rev. Lett. 116, 087003 1-5(2016).
    DOI:10.1103/PhysRevLett.116.087003
  • Thermal Conductivity through the Quantum Critical Point in YbRh2Si2 at Very Low Temperature
    M. Taupin, G. Knebel, T. D. Matsuda, G. Lapertot, Y. Machida, K. Izawa, J.-P. Brison, and J. Flouquet, Phys. Rev. Lett. 115, 046402 (2015).
    DOI:10.1103/PhysRevLett.115.046402
  • Intact Quasiparticles at an Unconventional Quantum Critical Point
    M. L. Sutherland, E. C. T. O’Farrell, W. H. Toews, J. Dunn, K. Kuga, S. Nakatsuji, Y. Machida, K. Izawa, and R. W. Hill, Phys. Rev. B 92, 041114(R) (2015).
    DOI:10.1103/PhysRevB.92.041114
  • Fermi surface, magnetic, and superconducting properties in actinide compounds
    Y. Onuki, R. Settai, Y. Haga, Y. Machida, K. Izawa, F. Honda, D. Aoki, C. R. Physique 15, 616-629 (2014).
    DOI:10.1016/j.crhy.2014.06.005
  • Pairing Symmetry of UPt3 Probed by Thermal Transport Tensors
    K. Izawa, Y. Machida, A. Itoh, Y. So, K. Ota, Y. Haga, E. Yamamoto, N. Kimura, Y. Onuki, Y. Tsutsumi, and K. Machida, J. Phys. Soc. Jpn. 83, 061013 (2014).
    DOI:10.7566/JPSJ.83.061013
  • Understanding of the Temperature-Pressure Phase Diagram of β- Pyrochlore Oxides: A Role of Anhamonicity on Superconductivity
    T. Isono, D. Iguchi, T. Matsubara, Y. Machida, B. Salce, J. Flouquet, H. Ogusu, J. Yamaura, Z. Hiroi, and K. Izawa, J. Phys. Soc. Jpn. 82, 114708 (2013). Selected as Editors’ choice.
    DOI:10.7566/JPSJ.82.114708
  • Verification of the Wiedemann-Franz Law in YbRh2Si2 at a Quantum Critical Point
    Y. Machida, K. Tomokuni, K. Izawa, G. Lapertot, G. Knebel, J.-P. Brison, and J. Flouquet, Phys. Rev. Lett. 110, 236402 (2013).
    DOI:10.1103/PhysRevLett.110.236402
  • Magnetic Field Driven Electronic Singularities through Metamag- netic Phenomena: Case of the Heavy Fermion Antiferromagnet Ce(Ru0.92Rh0.08)2Si2
    Y. Machida, K. Izawa, D. Aoki, G. Knebel, A. Pourret, and J. Flouquet, J. Phys. Soc. Jpn. 82, 054704 (2013).
    DOI:10.7566/JPSJ.82.054704
  • Thermoelectric response near a quantum critical point of β-YbAlB4 and YbRh2Si2: A comparative study
    Y. Machida, K. Tomokuni, C. Ogura, K. Izawa, K. Kuga, S. Nakatsuji, G. Lapertot, G. Knebel, J.-P. Brison, and J. Flouquet, Phys. Rev. Lett. 109, 156405 (2012).
    DOI:10.1103/PhysRevLett.109.156405
  • Twofold spontaneous symmetry breaking in a heavy fermion superconductor UPt3
    Y. Machida, A. Itoh, Y. So, K. Izawa, Y. Haga, E. Yamamoto, N. Kimura, Y. Onuki, Y. Tsutsumi, and K. Machida, Phys. Rev. Lett. 108, 157002 (2012).
    DOI:10.1103/PhysRevLett.108.157002
  • Enhanced quasiparticle heat conduction of the multigap superconductor Lu2Fe3Si5
    Y. Machida, S. Sakai, K. Izawa, H. Okuyama, and T. Watanabe, Phys. Rev. Lett. 106, 107002 (2011).
    DOI:10.1103/PhysRevLett.106.107002
  • Superconducting and Structural Transitions in the β-Pyrochlore Oxide KOs2O6 under High Pressure
    H. Ogusu, N. Takeshita, K. Izawa, J.I. Yamaura, Y. Oishi, S. Tsutsui, Y. Okamoto, Z. Hiroi, J. Phys. Soc. Jpn., 79, 114710 1-6 (2010).
    DOI:10.1143/JPSJ.79.114710
  • Possible Sign-Reversing s-Wave Superconductivity in Co-Doped BaFe2As2 Proved by Thermal Transport Measurements
    Y. Machida, K. Tomokuni, T. Isono, K Izawa, Y. Nakajima, T. Tamegai, J. Phys. Soc. Jpn. 78, 073705(2009).
    DOI:10.1143/JPSJ.78.073705
  • Re-examination of the crystal structure of the beta-pyrochlore oxide superconductor KOs2O6 by X-ray and convergent-beam electron diffraction analyses
    JI. Yamaura, Z. Hiroi, K. Tsuda, K. Izawa, Y. Ohishi, S. Tsutsui, Solid State Comm. 149, 31-34 (2009).
    DOI:10.1016/j.ssc.2008.10.029
  • Transport anomalies across the quantum limit in semimetallic Bi0.96Sb0.04
    A. Banerjee, B. Fauque, K. Izawa, A. Miyake, I. Sheikin, J. Flouquet, B. Lenoir, K. Behnia, Phys. Rev. B 78, 161103 (2008).
    DOI:10.1103/PhysRevB.78.161103
  • Temperature-pressure phase diagram of URu2Si2 from resistivity measurements and ac calorimetry: Hidden order and Fermi-surface nesting
    E. Hassinger, G. Knebel, K. Izawa, P. Lejay, B. Salce and J. Flouquet, Phys. Rev. B 77, 115117 (2008).
    DOI:10.1103/PhysRevB.77.115117
  • Thermoelectric Response Near a Quantum Critical Point: The Case of CeCoIn5
    K. Izawa, K. Behnia, Y. Matsuda, H. Shishido, R. Settai, Y. Onuki, and J. Flouquet, Phys. Rev. Lett. 99, 147005 (2007).
    DOI:10.1103/PhysRevLett.99.147005
  • Non-fermi liquid behavior in the magnetotransport of CeMln5 (M : Co and Rh): Striking similarity between quasi two-dimensional heavy fermion and high-Tc cuprates
    Y. Nakajima, H. Shishido, H. Nakai, T. Shibauchi, K. Behnia, K. Izawa, M. Hedo, Y. Uwatoko, T. Matsumoto, R. Settai, Y. Onuki, H. Kontani, and Y. Matsuda, J. Phys. Soc. Jpn. 76, 024703 (2007).
    DOI:10.1143/JPSJ.76.024703
  • Nodal structure of unconventional superconductors probed by angle resolved thermal transport measurements
    Y.Matsuda, K. Izawa, I. Vekhter, J. Phys.: Condens. Matter 18, R705-752 (2006).
    DOI:10.1088/0953-8984/18/44/R01
  • Evolution of Hall coefficient in two-dimensional heavy fermion CeCoIn5
    Y. Nakajima, K. Izawa, Y. Matsuda, K. Behnia, H. Kontani, M. Hedo, Y. Uwatoko, T. Matsumoto, H. Shishido, R. Settai, Y. Onuki, J. Phys. Soc. Jpn. 75, 023705 (2006).
    DOI:10.1143/JPSJ.75.023705
  • Anomalous quasiparticle transport in the superconducting state of CeCoIn5
    Y. Kasahara, Y. Nakajima, K. Izawa, Y. Matsuda, K. Behnia, H. Shishido, R. Settai, Y. Onuki, Phys. Rev. B 72, 214515 (2005).
    DOI:10.1103/PhysRevB.72.214515
  • Multiband superconductivity in the heavy fermion compound PrOs4Sb12
    G. Seyfarth, J.P. Brison, M.A. Measson, J. Flouquet, K. Izawa, Y. Matsuda, H. Sugawara, H. Sato, Phys. Rev. Lett. 95, 107004 (2005).
    DOI:10.1103/PhysRevLett.95.107004
  • Field-angle-resolved specific heat and thermal conductivity in the vortex phase of UPd2Al3
    P. Thalmeier, T. Watanabe, K. Izawa, Y. Matsuda, Phys. Rev. B 72, 024539 (2005).
    DOI:10.1103/PhysRevB.72.024539
  • Line nodes in the superconducting gap function of noncentrosymmetric CePt3Si
    Koichi Izawa, Y. Kasahara, Y. Matsuda, K. Behnia, T. Yasuda, R. Settai, Y. Onuki, Phys. Rev. Lett. 94, 197002 (2005).
    DOI:10.1103/PhysRevLett.94.197002
  • Thermal transport in the hidden-order state of URu2Si2
    K. Behnia, R. Bel, Y. Kasahara, Y. Nakajima, H. Jin, H. Aubin, K. Izawa, Y. Matsuda, J. Flouquet, Y. Haga, Y. Onuki, P. Lejay, Phys. Rev. Lett. 94, 156405 (2005).
    DOI:10.1103/PhysRevLett.94.156405
  • Superconducting gap function in antiferromagnetic heavy-fermion UPd2Al3 probed by angle-resolved magnetothermal transport measurements
    T. Watanabe, K. Izawa, Y. Kasahara, Y. Haga, Y. Onuki, P. Thalmeier, K. Maki, Y. Matsuda, Phys. Rev. B 70, 184502 (2004).
    DOI:10.1103/PhysRevB.70.184502
  • Triplet superconductivity in the skutterudite PrOs4Sb12
    K.Maki, S. Haas, D. Parker, H. Won, K. Izawa, Y. Matsuda, Europhys. Lett. 68, 720-725 (2004).
    DOI:10.1209/epl/i2004-10268-4
  • Flux-Line Lattice Distortion in PrOs4Sb12
    A.D. Huxley, M.-A. Measson, K. Izawa, C.D. Dewhurst, R. Cubbit, B. Grenier, H. Sugawara, J. Flouquet, Y. Matsuda H. Sato, Phys. Rev. Lett. 93, 187005 (2004).
    DOI:10.1103/PhysRevLett.93.187005
  • Gap symmetry of superconductivity in UPd2Al3
    H.Won, D.Parker, K.Maki, T.Watanabe, K. Izawa, and Y. Matsuda, Phys. Rev. B 70, 140509 (2004).
    DOI:10.1103/PhysRevB.70.140509
  • High-field state of the flux-line lattice in the unconventional superconductor CeCoIn5
    T. Watanabe, Y. Kasahara, K. Izawa, T. Sakakibara, Y. Matsuda, C.J. van der Beek, T. Hanaguri, H. Shishido, R.Settai, Y. Onuki, Phys. Rev. B 70, 020506 (2004).
    DOI:10.1103/PhysRevB.70.020506
  • Giant Nernst effect in CeCoIn5
    R. Bel, K. Behnia, Y. Nakajima, K. Izawa, Y. Matsuda, H. Shishido, R. Settai, Y. Onuki, Phys. Rev. Lett. 92, 217002(2004).
    DOI:10.1103/PhysRevLett.92.217002
  • Normal-state hall angle and magnetoresistance in Quasi-2D heavy fermion CeCoIn5 near a quantum critical point
    Y. Nakajima, K. Izawa, Y. Matsuda, S. Uji, T. Terashima, H. Shishido, R. Settai, Y. Onuki, H. Kontani, J. Phys. Soc. Jpn. 73, 5-8(2004).
    DOI:10.1143/JPSJ.73.5
  • Multiphase superconductivity in skutterudite PrOs4Sb12
    Kazumi Maki, H. Won, Peter Thalmeier, Q. Yuan, Koichi Izawa, Yuji Matsuda, Euro Phys. Lett. 64, 496-502 (2003).
    DOI:10.1209/epl/i2003-00250-2
  • Anomalous flux flow resistivity in the two-gap superconductor MgB2
    Akinori Shibata, Mari Matsumoto, Koichi Izawa, Yuji Matsuda, S. Lee, Setsuko Tajima, Phys. Rev. B 68, 060501 (2003).
    DOI:10.1103/PhysRevB.68.060501
  • Multiple superconducting phases in new heavy fermion superconductor PrOs4Sb12
    Koichi Izawa, Yasuyuki Nakajima, Jun Goryo, Yuji Matsuda, Shuji Osaki, Hitoshi Sugawara, Hidenori Sato, Peter Thalmeier, and Kazumi Maki, Phys. Rev. Lett. 90, 117001 (2003).
    DOI:10.1103/PhysRevLett.90.117001
  • Gap Function with Point Nodes in Borocarbide Superconductor YNi2B2C
    Koichi Izawa, Konomi Kamata, Yasuyuki Nakajima, Yuji Matsuda, Tadataka Watanabe, Minoru Nohara, Hidenori Takagi, Peter Thalmeier and Kazumi Maki, Phys. Rev. Lett. 89, 137006 (2002).
    DOI:10.1103/PhysRevLett.89.137006
  • Free flux flow resistivity in a strongly overdoped high-Tc cuprate: The purely viscous motion of the vortices in a semiclassical d-wave superconductor
    Yuji Matsuda, Akinori Shibata, Koichi Izawa, H. Ikuta, Masashi Hasegawa, Yusuke Kato, Phys. Rev. B66, 014527 (2002).
    DOI:10.1103/PhysRevB.66.014527
  • Superconducting Gap Structure of κ-(BEDT-TTF)2Cu(NCS)2 Probed by Thermal Conductivity Tensor
    Koichi Izawa, Hedemasa Yamaguchi, Takahiko Sasaki, Yuji Matsuda, Phys. Rev. Lett. 88, 027002 (2002).
    DOI:10.1103/PhysRevLett.88.027002
  • Angular Position of Nodes in the Superconducting Gap of Quasi-2D Heavy-Fermion Superconductor CeCoIn5
    Koichi Izawa, Hidemasa Yamaguchi, Yuji Matsuda, Hiroaki Shishido, Rikio Settai, and Yoshichika Onuki, Phys. Rev. Lett. 87, 057002 (2001).
    DOI:10.1103/PhysRevLett.87.057002
  • Superconducting gap structure of spin-triplet superconductor Sr2RuO4 studied by thermal conductivity
    Koichi Izawa, Hidekazu Takahashi, Hidemasa Yamaguchi, Yuji Matsuda, Masatoshi Suzuki, Takahiko Sasaki, Tetsuo Fukase, Yoshiyuki Yoshida, Rikio Settai, and Yoshichika Onuki, Phys. Rev. Lett. 86, 2653-2656 (2001).
    DOI:10.1103/PhysRevLett.86.2653
  • Low energy quasiparticle excitation in the vortex state of borocarbide superconductor YNi2B2C
    Koichi Izawa, Akinori Shibata, Yuji Matsuda, Yusuke Kato, Hiroyuki Takeya, Kazuto Hirata, C.J. van der Beek and Marcin Konczykowsky, Phys. Rev. Lett. 86, 1327-1330 (2001).
    DOI:10.1103/PhysRevLett.86.1327
  • Metallic ground state of CeNiSn
    K. Izawa, T. Suzuki, T. Fujita, T. Takabatake, G. Nakamoto, H. Fujii, and K. Maezawa, Phys. Rev. B 59, 2599-2603 (1999).
    DOI:10.1103/PhysRevB.59.2599
  • Giant magnetoresistance in Ce2Fe17
    Y. Janssen, H. Fujii, T. Ekino, K. Izawa, T. Suzuki, T. Fujita, and F.R. de Boer, Phys. Rev. B 56, 13716-13719 (1997).
    DOI:10.1103/PhysRevB.56.13716
  • Magnetic Property of CeNiC2 Studied by Macroscopic and Microscopic Measurements
    K. Motoya, K. Nakaguchi, N. Kayama, K. Inari, J. Akimitsu, K. Izawa, and T. Fujita, J. Phys. Soc. Jpn. 66, 1124-1129 (1997).
    DOI:10.1143/JPSJ.66.1124
  • The Origin of Magnetic Field Dependence of Specific Heat in Single-Crystalline CeNiSn
    K. Izawa, T. Suzuki, M. Kitamura, T. Fujita,T. Takabatake, G. Nakamoto, H. Fujii, and K. Maezawa, J. Phys. Soc. Jpn. 65, 3119-3122 (1996).
    DOI:10.1143/JPSJ.65.3119
  • Different Electronic Ground States in the Hexagonal and Cubic Phases of UAu2Sn
    K. Izawa, T. Suzuki, T. Fujita, Y. Maeda, T. Takabatake, and H. Fujii, J. Phys. Soc. Jpn. 65, 3260-3265 (1996).
    DOI:10.1143/JPSJ.65.3260

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国際会議報告(査読有)

  • Non-Fermi Liquid Properties in a Cubic Pr-Based Compound PrPb3 under Magnetic Fields
    T. Yoshida, Y. Machida, K. Izawa, T. Onimaru, and H. S. Suzuki, J. Phys.: Cof. Ser. 683, 012031 (2016).
    DOI:10.1088/1742-6596/683/1/012031
  • Common Anomalies of Transport Properties in PrTr2Zn20 (Tr = Ir, Rh) with Non-Kramers Doublet Ground State
    T. Yoshida, Y. Machida, K. Izawa, Y. Shimada, N. Nagasawa, T. Onimaru, and T. Takabatake, Phys. Procedia 75, 529 (2015).
    DOI:10.1016/j.phpro.2015.12.067
  • Development of Field Angle Resolved Specific Heat Measurement System for Unconventional Superconductors
    Y. Kitamura, T. Matsubara, Y. Machida, Y. Onuki, B. Salce, J. Flouquet, and K. Izawa, J. Phys.: Cof. Ser. 592, 012148 (2015).
    DOI:10.1088/1742-6596/592/1/012148
  • Anomalous Enhancement of Seebeck Coefficient in Pr-Based1-2-20 System with Non-Kramers Doublet Ground States
    Y. Machida, T. Yoshida, T. Ikeura, K. Izawa, A. Nakama, R. Higashinaka, Y. Aoki, H. Sato, A. Sakai, S. Nakatsuji, N. Nagasawa, K. Matsumoto, T. Onimaru, and T. Takabatake, J. Phys.: Cof. Ser. 592, 012025 (2015).
    DOI:10.1088/1742-6596/592/1/012025
  • Anomalous Enhancement of Seebeck Coefficient in PrIr2Zn20
    T. Ikeura, T. Matsubara, Y. Machida, K. Izawa, N. Nagasawa, K. T. Matsumoto, T. Onimaru, and T. Takabatake, JPS Conf. Proc. 3, 011091 (2014).
    DOI:10.7566/JPSCP.3.011091
  • Pressure dependence of upper critical field in β-pyrochlore oxides
    D. Iguchi, T. Isono, Y. Machida, K. Izawa, B. Salce, J. Flouquet, H. Ogusu, J. Yamaura, and Z. Hiroi, J. Phys. Soc. Jpn. 80, SA040 (2011).
    DOI:10.1143/JPSJS.80SA.SA040
  • Crystal structure and superconductivity of β-pyrochlore oxides under high pressure
    T. Isono, Y. Hara, D. Iguchi, Y. Machida, K. Izawa, S. Tsutsui, T. Matsuoka, Y. Ohishi, B. Salce, J. Flouquet, H. Ogusu, J-I. Yamaura, and Z. Hiroi, J. Phys. Soc. Jpn. 80, SA041 (2011).
    DOI:10.1143/JPSJS.80SA.SA041
  • Thermoelectric coefficients of the quantum critical β-YbAlB4
    Y. Machida, C. Ogura, K. Izawa, K. Kuga, and S. Nakatsuji, J. Phys. Soc. Jpn. 80, SA088 (2011).
    DOI:10.1143/JPSJS.80SA.SA088
  • Thermal transport properties and quantum criticality of heavy fermion YbRh2Si2
    K. Tomokuni, Y. Machida, K. Izawa, G. Lapertot, G. Knebel, J-P. Brison and J. Flouquet, J. Phys. Soc. Jpn. 80, SA096 (2011).
    DOI:10.1143/JPSJS.80SA.SA096
  • Thermal conductivity tensor of single crystalline Co-doped BaFe2As2
    Y. Machida, K. Tomokuni, T. Isono, K. Izawa, Y. Nakajima, T. Tamegai, Physica E, 43, 714 (2011).
    DOI:10.1016/j.physe.2010.07.036
  • Low-temperature specific heat of the β-pyrochlore oxide superconductors under high pressure
    T. Isono, D. Iguchi, Y. Machida, K. Izawa, B. Salce, J. Flouquet, H. Ogusu, J. Yamaura, Z. Hiroi, Physica E, 43, 726 (2011).
    DOI:10.1016/j.physe.2010.07.039
  • Non-Fermi liquid behavior in the magnetotransport of quasi two-dimensional heavy Fermion compounds CeMIn5
    Y. Nakajima, T. Shibauchi, H. Shishido, H. Nakai, K. Behnia, K. Izawa, M. Hedo, Y. Uwatoko, T. Matsumoto, R. Settai, Y. Onuki, H. Kontani, Y. Matsuda, J. Phys. Chem. Solids 69, 3261-3264 (2008).
    DOI:10.1016/j.jpcs.2008.06.064
  • Striking similarities between HTSC and quasi-2D HFCeRIn5
    K. Izawa, Y. Nakajima, Y. Kasahara, R. Bel, K. Behnia, H. Shishido, R. Settai, Y. Onuki, H. Kontani, Y. Matsuda, Physica C 460, 145-148 (2007).
    DOI:10.1016/j.physc.2007.04.004
  • Unusual Hall effect in quasi two-dimensional strongly correlated metal CeCoIn5
    Y. Nakajima, H. Shishido, K. Izawa, Y. Matsuda, H. Kontani, H. Hedo, Y. Uwatoko, T. Matsumoto, R. Settai, and Y. Onuki, Physica C 460, 680-681 (2007).
    DOI:10.1016/j.physc.2007.03.082
  • Interplay between different states in heavy-fermion physics
    G. Knebel, K. Izawa, F. Boudarot, E. Hassinger, B. Salce, D. Aoki, and J. Flouquet, J. Magn. Magn. Matter 310, 195-200 (2007).
    DOI:10.1016/j.jmmm.2006.10.007
  • Hall effect in the quasi two-dimensional strongly correlated metal CeMIn5 (M = Co, Rh)
    Y. Nakajima, H. Shishido, H. Nakai, T. Shibauchi, K. Izawa, K. Behnia, H. Hedo, Y. Uwatoko, T. Matsumoto, R. Settai, Y. Onuki, H. Kointani, and Y. Matsuda, J. Magn. Magn. Matter 310, 334-336 (2007).
    DOI:10.1016/j.jmmm.2006.10.028
  • Giant Nernst effect in heavy-electron metals
    K. Behnia, R. Bel, A. Pourret, K. Izawa, J. Flouquet, Y. Nakajima, Y. Matsuda, D. Kikuchi, Y. Aoki, H. Sugawara and H. Sato, J. Magn. Magn. Matter 310, 446-448 (2007).
    DOI:10.1016/j.jmmm.2006.10.897
  • Anomalous quasiparticle transport and superclean superconducting state of CeCoIn5
    Y. Kasahara, Y. Nakajima, K. Izawa, Y. Matsuda, K. Behnia, H. Shishido, R. Settai and Y. Onuki, J. Magn. Magn. Matter 310, 569-571 (2007).
    DOI:10.1016/j.jmmm.2006.10.154
  • Pressure effect of electrical resistivity and AC specific heat in CePtAl
    M. Nakashima, T. Ueda, K. Shimizu, H. Nakashima, A. Thamizhavel, N. Tateiwa, Y. Haga, M. Hedo, Y. Uwatoko, R. Settai, Y. Onuki, K. Izawa, G. Knebel, B. Salce and J. Flouquet, J. Magn. Magn. Matter 310, E9-E11 (2007).
    DOI:10.1016/j.jmmm.2006.10.056
  • Low-temperature thermal conductivity of noncentrosymmetric CePt3Si
    K. Izawa, Y. Kasahara, Y. Matsuda, K. Behnia, T. Yasuda, R. Settai, Y. Onuki, Physica B 378-380, 361-362 (2006).
    DOI:10.1016/j.physb.2006.01.128
  • New high magnetic state of flux line lattce in CeCoIn5
    Y. Kasahara, T. Watanabe, K. Izawa, T.Sakakibara, CJ van der Beek, T. Hanaguri, M. Nohara, H. Takagi, H. SHishido, R. Settai, Y. Onuki, Y. Matsuda, Physica C 426, 36-40 (2005).
    DOI:10.1016/j.physc.2005.02.018
  • Superconducting gap structure of antiferromagnetic heavy-fermion superconductor UPd2Al3 studied by thermal conductivity measurements with rotating magnetic field
    T. Watanabe, K. Izawa, Y. Kasahara, Y. Haga, Y. Onuki, P. Thalmeier, K. Maki, Y. Matsuda, Physica C 426, 234-239 (2005).
    DOI:10.1016/j.physc.2004.12.018
  • Multiple superconducting phases in heavy fermion superconductors
    Y. Matsuda, K. Izawa, T. Watanabe, Y. Kasahara, Y. Nakajima, T. Sakakibara, CJ. van der Beek, M. Nohara, T. Hanaguri, H. Takagi, J. Goryo, K. Maki, P. Thalmeier, S. Osaki, H. Sugawara, H. Sato, H. Shishido, R. Settai, Y. Onuki, J. Phys. Chem. Sol. 66, 1365-1369 (2005).
    DOI:10.1016/j.jpcs.2005.05.012
  • Triplet superconductivity in PrOs4Sb12
    K. Maki, H. Won, D. Parker, S. Haas, K. Izawa, Y. Matsuda, Physica B 359, 527-529 (2005).
    DOI:10.1016/j.physb.2005.01.136
  • Superconductivity of the filled skuterrudite PrOs4Sb12: Phase diagram and characterisations
    M.A. Measson, J.P. Brison, G. Seyfarth, D. Braithwaite, G. Lapertot, B. Salce, J. Flouquet, E. Lhotel, C. Paulsen, H. Sugawara, H. Sato, P.C. Canfield, K. Izawa, Y. Matsuda, Physica B 359, 827-829 (2005).
    DOI:10.1016/j.physb.2005.01.242
  • Observation of a symmetry change in the gap function in heavy-fermion superconductor PrOs4Sb12
    K. Izawa,Y. Nakajima, J. Goryo, Y. Matsuda, S. Osaki, H. Sugawara, H. Sato, P. Thalmeier, K. Maki, J. Magn. Magn. Matter 272-276, 144-145 (2004).
    DOI:10.1016/j.jmmm.2003.12.1018
  • Anomalous flux flow resistivity of MgB2
    M. Matsumoto, A. Shibata, K. Izawa,Y. Matsuda, S. Lee, S. Tajima, Physica C 412-414, 397-401 (2004).
    DOI:10.1016/j.physc.2004.01.060
  • Observation of a symmetry change in the gap function in PrOs4Sb12
    Koichi Izawa, and Yuji Matsuda, Physica C 412-414, 21-26 (2004).
    DOI:10.1016/j.physc.2004.01.035
  • Gap structure and anomalous superconducting state of quasi-2D heavy-fermion CeCoIn5
    Koichi Izawa, Hidemasa Yamaguchi, Yuji Matsuda, Hiroaki Shishido, Rikio Settai, Yoshichika Onuki, Physica C 388-389, 537-538 (2003).
    DOI:10.1016/S0921-4534(02)02730-2
  • Evidence of point nodes in superconducting gap of borocarbide superconductor YNi2B2C
    Konomi Kamata, Koichi Izawa, Yasuyuki Nakajima, Yuji Matsuda, Tadataka Watanabe, Minoru Nohara, Hidenori Takagi, Hiroyuki Takeya, Kazuto Hirata, Peter Thalmeier, Kazumi Maki, Physica C 388-389, 185-186 (2003).
    DOI:10.1016/S0921-4534(02)02719-3
  • Determination of the directions of gap nodes in exotic superconductors
    Yuji Matsuda, Koichi Izawa , Physica C 388-389, 487-488 (2003).
    DOI:10.1016/S0921-4534(02)02389-4
  • Purely viscous motion of the vortices in semiclassical d-wave superconductor
    Yuji Matsuda, Koichi Izawa, Akinori Shibata, H. Ikura, Masashi Hasegawa, Yusuke Kato, Physica C 388-389, 709-710 (2003).
    DOI:10.1016/S0921-4534(02)02484-X
  • Superconducting Gap Structure of YNi2B2C determined by Thermal Conductivity
    Konomi Kamata, Koichi Izawa, Yasuyuki Nakajima, Yuji Matsuda, Tadataka Watanabe, Minoru Nohara, Hedenori Takagi, Hiroyuki Takeya, Kazuto Hirata, Peter Thalmeier, Kazumi Maki, J. Low Temp. Phys. 131, 1095-1099 (2003).
    DOI:10.1023/A:1023453127025
  • Nodal structure of unconventional superconductors determined by thermal conductivity
    Koichi Izawa, Yuji Matsuda, J. Low Temp. Phys. 131, 429-433 (2003).
    DOI:10.1023/A:1022982715521
  • Nodal structure of unconventional superconductors determined by thermal conductivity
    Yuji Matsuda, Koichi Izawa, Acta. Phys. Pol. B 34, 579-582 (2003).
    LINK
  • Growth and Upper Critical Field of Heavily Overdoped Tl2Ba2CuOx Single Crystals
    Masashi Hasegawa, Koichi Izawa, Akinori Shibata, and Yuji Matsuda, Physica C 377, 459 (2002).
    DOI:10.1016/S0921-4534(01)01303-X
  • Quasiparticle structure in the vortex state of anisotropic s-wave superconductor YNi2B2C
    Akinori Shibata, Koichi Izawa, Yuji Matsuda, Yusuke Kato, Hiroyuki Takeya, C.J. van der Beek, Marcin Knczykowski, J. Phys. Chem. Sol. 63, 991-993 (2002).
    DOI:10.1016/S0022-3697(02)00114-2
  • Probing the nodal structure in quasi-2D unconventional superconductors by thermal conductivity
    Koichi Izawa, Hidemasa Yamaguchi, Yuji Matsuda, Takahiko Sasaki, Rikio Settai, and Yoshichika Onuki, J. Phys. Chem. Sol. 63, 1055-1059 (2002).
    DOI:10.1016/S0022-3697(02)00134-8
  • Angular Position of Nodes in the Superconducting Gap of 2D Unconventional Superconductors
    Koichi Izawa, Hidemasa Yamaguchi, Yuji Matsuda, Takahiko Sasaki, Tetsuo Fukase, Yoshiyuki Yoshida, Rikio Settai, and Yoshichika Onuki, Physica C 367, 15-19 (2001).
    DOI:10.1016/S0921-4534(01)00979-0
  • Unusual microwave vortex dissipation of Nd1.85Ce0.15CuO4
    Akinori Shibata, Koichi Izawa, Yuji Matsuda, Y. Saito, Kazuto Hirata, Physica C 357, 517-519 (2001).
    DOI:10.1016/S0921-4534(01)00339-2
  • Heat capacity of YNi2B2C in the vortex state: an evidence of the extended s-wave state
    Koichi Izawa, Akinori Shibata, Yuji Matsuda, Yusuke Kato, Hiroyuki Takeya, Kazuto Hirata, C.J. van der Beek and Marcin Konczykowsky, Physica C 357, 513-516 (2001).
    DOI:10.1016/S0921-4534(01)00338-0
  • Crystal growth techniques for Tl-based cuprate superconductors
    Masashi Hasegawa, H Takei, Koichi Izawa, Yuji Matsuda, J. Cryst. Growth 229, 401-404 (2001).
    DOI:10.1016/S0022-0248(01)01189-7
  • Anomalous Microwave Response and Upper Critical Field in Overdoped Tl2Ba2CuO6+d
    Koichi Izawa, Akinori Shibata, Hidekazu Takahashi, Yuji Matsuda, Masashi Hasegawa, Noriko Chikumoto, C.J. van der Beek and Marcin Konczykowsky, Advances in Superconductivitiy XII, 293 (Springer-Verlag, Tokyo, 2000).
    Link
  • Microwave Flux Flow Resistivity of Clean Limit Superconductor YNi2B2C
    Akinori Shibata, Koichi Izawa, Yuji Matusda, Hiroyuki Takeya, Akira Kamimura and Kazuto Hirata, Advances in Superconductivitiy XII, 380 (Springer-Verlag, Tokyo, 2000).
    Link
  • Growth and Characterization of Single Crystals of Tl-Based Cuprate Superconductors
    Masashi Hasegawa, H. Takei, Koichi Izawa and Yuji Matsuda, Advances in Superconductivitiy XII, 107 (Springer-Verlag, Tokyo, 2000).
    Link
  • Microwave Surface Impedance in Overdoped Tl2Ba2CuO6+d
    Koichi Izawa, Akinori Shibata, Hidekazu Takahashi, Yuji Matsuda, Masashi Hasegawa, Noriko Chikumoto, C.J. van der Beek and Marcin Konczykowsky, Physica B 284-288, 945-946 (2000).
    DOI:10.1016/S0921-4526(99)02263-2
  • Flux Flow Resistance and Transmittivity in Overdoped Tl2Ba2CuO6+d
    Koichi Izawa, Akinori Shibata, Hidekazu Takahashi, Yuji Matsuda, Masashi Hasegawa, Noriko Chikumoto, C.J. van der Beek and Marcin Konczykowsky, J. Low Temp. Phys. 117, 1193-1197 (1999).
    DOI:10.1023/A:1022519617094
  • Growth and Characterization of Tl2Ba2CuO6+d Single Crystals
    Masashi Hasegawa, H. Takei, Koichi Izawa and Yuji Matsuda, J. Low Temp. Phys. 117, 741-745 (1999).
    DOI:10.1023/A:1022549329077
  • Specific heat of YbPtSn
    T. Suzuki, Y. Matsumoto, F. Masaki, K. Izawa, M. Ito, K. Katoh, T. Takabatake, T. Fujita, Physica B 261,146-147 (1999).
    DOI:10.1016/S0921-4526(98)00631-0
  • Anomalous field dependence of specific heat of CeNiSn below 1K
    K. Izawa, T. Suzuki, T. Fujita,T. Takabatake, G. Nakamoto, H. Fujii, and K. Maezawa, J. Magn. Magn. Mater. 177-181, 395-396 (1998).
    DOI:10.1016/S0304-8853(97)00408-3
  • Ce- and Yb-based Kondo semiconductors
    T. Takabatake, F. Iga, T. Yoshino, Y. Echizen, K. Kobayashi, M. Higa, K. Katoh, N. Shimizu, Y. Bando, G. Nakamoto, H. Fujii, K. Izawa, T. Suzuki, T. Fujita, M. Sera, M. Hiroi, K. Maezawa, S. Mock, H.v. Löeysen, A. Brükl, K. Neumaier, and K. Andres, J. Magn. Magn. Mater. 177-181, 277-282 (1998).
    DOI:10.1016/S0304-8853(97)00842-1
  • Effect of high magnetic field on gap formation in CeNiSn
    K. Izawa, T. Suzuki, M. Kitamura, T. Fujita, G. Nakamoto, T. Takabatake, and H. Fujii, Physica B 230-232, 670-672 (1997).
    DOI:10.1016/S0921-4526(96)00785-5
  • Localization effects in Kondo semimetals CeNiSn and CeRhSb
    T. Takabatake, G. Nakamoto, Y. Yoshino, H. Fujii, K. Izawa, S. Nishigori, H. Goshima, T. Suzuki, T. Fujita, K. Maezawa, T. Hiraoka, Y. Okayama, I. Oguro, A.A. Menovsky, K. Neumaier, A. Brükl, and K. Andres, Physica B 223&224, 413-420 (1996).
    DOI:10.1016/0921-4526(96)00137-8
  • Double magnetic transitions in UPt2In
    Y. Maeda, T. Takabatake, Y. Bando, H. Fujii, K. Oda, K. Sugiyama, K. Kindo, K. Izawa, T. Suzuki, T. Fujita, and Y. Morii, Physica B 223&224, 228-230 (1996).
    DOI:10.1016/0921-4526(96)00085-3
  • Effect of impurity phases on the anisotropic transport properties of CeNiSn
    G. Nakamoto, T. Takabatake, Y. Bando, H. Fujii, K. Izawa, T. Suzuki, T. Fujita, A. Minami, I. Oguro, L.T. Tai, and A.A. Menovsky, Physica B 206&207, 840-843 (1995).
    DOI:10.1016/0921-4526(94)00602-R
  • Polymorphism and heavy-fermion behavior in UAu2Sn
    Y. Maeda, T. Takabatake, H. Fujii, K. Izawa, T. Suzuki, T. Fujita, A. Minami, K. Oda, K. Sugiyama, and K. Kindo, J. Magn. Magn. Mater. 140-144, 1363-1364 (1995).
    DOI:10.1016/0304-8853(94)00610-5

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解説・書籍

  • 「フレキシブル熱電変換材料の開発と応用」
    第3章 有機強相関材料における巨大ゼーベック効果
    町田洋, 井澤公一, シーエムシー出版, ISBNコード: 978-4-7813-1255-2
  • 重い電子系超伝導体 UPt3 における自発的に回転対称性の破れた超伝導
    井澤公一, 町田洋, 固体物理 49, 345 (2014).
  • ポイントノードをもつ超伝導体YNi2B2C
    井澤公一, 鎌田このみ, 松田祐司, 日本物理学会誌 59, 92-96 (2004).
  • 準2次元異方的超伝導体の超伝導ギャップ構造
    井澤公一, 松田祐司, 固体物理 37, 235-252 (2002).

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