Evidence for line nodes in the superconducting energy gap of noncentrosymmetric CePt3Si from magnetic penetration depth measurements -: art. no. 207002

被引：173
作者：
Bonalde, I
Brämer-Escamilla, W
Bauer, E
机构：
[1] Inst Venezolano Invest Cient, Ctr Fis, Caracas 1020A, Venezuela
[2] Vienna Univ Technol, Inst Festkorperphys, A-1040 Vienna, Austria
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 20期
关键词：
D O I：
10.1103/PhysRevLett.94.207002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report measurements of the magnetic penetration depth lambda(T) in high-quality CePt3Si samples down to 0.049 K. We observe a linear temperature dependence below T similar or equal to 0.16T(c), which is interpreted as evidence for line nodes in the energy gap of the low-temperature phase of this material. A kink in lambda(T) at about 0.53 K may be associated with the second superconducting transition recently reported. The results are discussed in terms of the symmetry of the superconducting order parameter.
引用
收藏
页数：4
相关论文
共 16 条
[1]  
ANDERSON PW, 1984, PHYS REV B, V30, P4000, DOI 10.1103/PhysRevB.30.4000
[2]   Heavy fermion superconductivity and magnetic order in noncentrosymmetric CePt3Si -: art. no. 027003 [J].
Bauer, E ;
Hilscher, G ;
Michor, H ;
Paul, C ;
Scheidt, EW ;
Gribanov, A ;
Seropegin, Y ;
Noël, H ;
Sigrist, M ;
Rogl, P .
PHYSICAL REVIEW LETTERS, 2004, 92 (02) :4
[3]   Superconductivity without inversion symmetry:: MnSi versus CePt3Si -: art. no. 097001 [J].
Frigeri, PA ;
Agterberg, DF ;
Koga, A ;
Sigrist, M .
PHYSICAL REVIEW LETTERS, 2004, 92 (09) :097001-1
[4]  
GOLDFARB RB, 1991, MAGNETIC SUSCEPTIBILITY OF SUPERCONDUCTORS AND OTHER SPIN SYSTEMS, P49
[5]   Quantum size effects on the superconducting parameters of zero-dimensional Pb nanoparticles [J].
Li, WH ;
Yang, CC ;
Tsao, FC ;
Lee, KC .
PHYSICAL REVIEW B, 2003, 68 (18)
[6]   Exponential temperature dependence of the penetration depth in single crystal MgB2 -: art. no. 047002 [J].
Manzano, F ;
Carrington, A ;
Hussey, NE ;
Lee, S ;
Yamamoto, A ;
Tajima, S .
PHYSICAL REVIEW LETTERS, 2002, 88 (04) :4
[7]  
Mineev V. P., 1999, Introduction to Unconventional Superconductivity.
[8]   Evidence for unconventional superconductivity in the nonoxide perovskite MgCNi3 from penetration depth measurements -: art. no. 180502 [J].
Prozorov, R ;
Snezhko, A ;
He, T ;
Cava, RJ .
PHYSICAL REVIEW B, 2003, 68 (18)
[9]   CePt3Si:: An unconventional superconductor without inversion center -: art. no. 094514 [J].
Samokhin, KV ;
Zijlstra, ES ;
Bose, SK .
PHYSICAL REVIEW B, 2004, 69 (09)
[10]   THE ORDER-PARAMETER FOR THE SUPERCONDUCTING PHASES OF UPT(3) [J].
SAULS, JA .
ADVANCES IN PHYSICS, 1994, 43 (01) :113-141
12