学术探索
学术期刊
新闻热点
数据分析
智能评审

Exotic superconducting properties in the electron-hole-compensated heavy-fermion "Semimetal" URu2Si2

被引：178
作者：
Kasahara, Y. [1 ]
Iwasawa, T.
Shishido, H.
Shibauchi, T.
Behnia, K.
Haga, Y.
Matsuda, T. D.
Onuki, Y.
Sigrist, M.
Matsuda, Y.
机构：
[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan
[2] CNRS, ESPCI, Phys Quant Lab, F-75231 Paris, France
[3] Adv Sci Res Ctr, Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan
[4] Osaka Univ, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan
[5] ETH, Inst Theoret Phys, CH-8093 Zurich, Switzerland
[6] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 11期
关键词：
D O I：
10.1103/PhysRevLett.99.116402
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We show that the charge and thermal transport measurements on ultraclean crystals of URu2Si2 reveal a number of unprecedented superconducting properties. The uniqueness is best highlighted by the peculiar field dependence of thermal conductivity including the first-order transition at H-c2 with a reduction of entropy flow. This is a consequence of multiband superconductivity with compensated electronic structure in the hidden order state of this system. We provide strong evidence for a new type of unconventional superconductivity with two distinct gaps having different nodal topology.
引用
收藏
页数：4
相关论文
共 23 条
[1]  
AMITSUKA H, ARXIVCONDMAT0610139
[2]   Thermal transport in the hidden-order state of URu2Si2 -: art. no. 156405 [J].
Behnia, K ;
Bel, R ;
Kasahara, Y ;
Nakajima, Y ;
Jin, H ;
Aubin, H ;
Izawa, K ;
Matsuda, Y ;
Flouquet, J ;
Haga, Y ;
Onuki, Y ;
Lejay, P .
PHYSICAL REVIEW LETTERS, 2005, 94 (15)
[3]   Thermoelectricity of URu2Si2:: Giant Nernst effect in the hidden-order state -: art. no. 220501 [J].
Bel, R ;
Jin, H ;
Behnia, K ;
Flouquet, J ;
Lejay, P .
PHYSICAL REVIEW B, 2004, 70 (22) :220501-1
[4]   Quantum oscillations in URu2Si2 [J].
Bergemann, C ;
Julian, SR ;
McMullan, GJ ;
Howard, BK ;
Lonzarich, GG ;
Lejay, P ;
Brison, JP ;
Flouquet, J .
PHYSICA B, 1997, 230 :348-350
[5]   Hidden orbital order in the heavy fermion metal URu2Si2 [J].
Chandra, P ;
Coleman, P ;
Mydosh, JA ;
Tripathi, V .
NATURE, 2002, 417 (6891) :831-834
[6]   Metal-insulator-like behavior in semimetallic bismuth and graphite [J].
Du, X ;
Tsai, SW ;
Maslov, DL ;
Hebard, AF .
PHYSICAL REVIEW LETTERS, 2005, 94 (16)
[7]   Angular position of nodes in the superconducting gap of quasi-2D heavy-fermion superconductor CeCoIn5 -: art. no. 057002 [J].
Izawa, K ;
Yamaguchi, H ;
Matsuda, Y ;
Shishido, H ;
Settai, R ;
Onuki, Y .
PHYSICAL REVIEW LETTERS, 2001, 87 (05) :57002-1
[8]   Thermal conductivity of the pyrochlore superconductor KOs2O6:: Strong electron correlations and fully gapped superconductivity [J].
Kasahara, Y. ;
Shimono, Y. ;
Shibauchi, T. ;
Matsuda, Y. ;
Yonezawa, S. ;
Muraoka, Y. ;
Hiroi, Z. .
PHYSICAL REVIEW LETTERS, 2006, 96 (24)
[9]   PARTIALLY GAPPED FERMI-SURFACE IN THE HEAVY-ELECTRON SUPERCONDUCTOR URU2SI2 [J].
MAPLE, MB ;
CHEN, JW ;
DALICHAOUCH, Y ;
KOHARA, T ;
ROSSEL, C ;
TORIKACHVILI, MS ;
MCELFRESH, MW ;
THOMPSON, JD .
PHYSICAL REVIEW LETTERS, 1986, 56 (02) :185-188
[10]   Nodal structure of unconventional superconductors probed by angle resolved thermal transport measurements [J].
Matsuda, Y. ;
Izawa, K. ;
Vekhter, I. .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2006, 18 (44) :R705-R752
123