Anomalous superconducting states of unconventional superconductors

非常规超导体的反常超导态

• 批准号: 17204031
• 负责人: MATSUDA Yuji
• 金额: $ 26.96万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17204031/
• 关键词: superconductivity; symmetry; heavy fermion; hidden order; vortex lattice; quasiparticle; quantum critical point; strongly correlated system; パイロクロア; フェルミ流体; マイクロ波; 人工超格子; 超伝導対称性; 重い電子系; 熱伝導; 異方的超伝導; ホール係数; FFLO; 磁気抵抗

We have studied the superconducting gap symmetry by the thermal transport measurements. Particularly, we have determined the superconducting gap symmetry of URu_2Si_2, by the thermal transport measurements in magnetic field rotating various directions relative to the crystal axes down to dilution refrigerator temperatures. In this system, superconductivity occurs within the so-called hidden order phase, but the detailed nature of the superconductivity is still unclear. We found that the superconducting gap function pas a chiral symmetry, which is quite unique among unconventional superconductors. We also found that the vortex lattice melting in ultraclean URu_2Si_2 single crystals, by the local Hall probe measurements. We have also grown the epitaxial thin films of artificial thin films of CeIn_3 and LaIn_3.

我们用热输运测量研究了超导带隙对称性。特别地，我们通过在相对于晶轴的不同方向旋转的磁场中的热输运测量，确定了URu_2Si_2的超导带隙对称性。在这个系统中，超导性发生在所谓的隐藏有序相，但超导性的详细性质仍然不清楚。我们发现超导能隙函数不具有手征对称性，这在非常规超导体中是非常独特的。通过局域霍尔探针测量，我们还发现了超净URu_2Si_2单晶中的涡旋晶格熔化。我们还生长了CeIn_3和LaIn_3人工薄膜的外延薄膜。

项目成果

Exotic Superconducting State Embedded in the Hidden Order of DRu2Si2

DRu2Si2 隐藏秩序中嵌入的奇异超导态

• 发表时间: 2008
• 作者: Yuji;Matsuda
• 通讯作者: Matsuda

Fulde-Ferrell-Larkin-Ovohinnikov State in Heavy Fermion Supercomductors

重费米子超导体中的 Fulde-Ferrell-Larkin-Ovohinnikov 态

• 发表时间: 2007
• 期刊: J. Phys. Soc. Jpn 76
• 作者: Y.;Matsuda;H.;Shimahara
• 通讯作者: Shimahara

Effects of Rattling Phonons on the Quasiparticle Excitation and Dynamics of the Superconducting KOs206

响声声子对超导 KOs206 准粒子激发和动力学的影响

• 发表时间: 2007
• 期刊: Phys. Rev. Lett. 98
• 作者: Y. Shimono;et. al.
• 通讯作者: et. al.

Multiband superconductivity in the heavy fermion compound PrOs4Sb12.

• DOI: 10.1103/physrevlett.95.107004
• 发表时间: 2005-06
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: G. Seyfarth;J. Brison;M. Measson;J. Flouquet;K. Izawa;Y. Matsuda;H. Sugawara;H. Sato

「研究成果報告書概要(和文)」より

摘自《研究结果报告摘要（日文）》

• 发表时间: 2005
• 作者: Kawauchi;et. al.;Nishimura et al.;Dezawa et al.;Yoshizawa et al.;星野 幹雄;星野 幹雄
• 通讯作者: 星野 幹雄