Experimental evidence for two gaps in the high-temperature La1.83Sr0.17CuO4 superconductor

被引：137
作者：
Khasanov, R.
Shengelaya, A.
Maisuradze, A.
La Mattina, F.
Bussmann-Holder, A.
Keller, H.
Mueller, K. A.
机构：
[1] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland
[2] Tbilisi State Univ, Inst Phys, GE-0128 Tbilisi, Georgia
[3] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 05期
关键词：
D O I：
10.1103/PhysRevLett.98.057007
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The in-plane magnetic field penetration depth (lambda(ab)) in single-crystal La1.83Sr0.17CuO4 was investigated by muon-spin rotation (mu SR). The temperature dependence of lambda(-2)(ab) has an inflection point around 10-15 K , suggesting the presence of two superconducting gaps: a large gap (Delta(d)(1)) with d-wave and a small gap (Delta(s)(2)) with s-wave symmetry. The zero-temperature values of the gaps at mu H-0 = 0.02 T were found to be Delta(d)(1)(0) = 8.2(1) meV and Delta(s)(2)(0) = 1.57(8) meV.
引用
收藏
页数：4
相关论文
共 41 条
[31]   Ab initio evidence for the formation of impurity d3z2-r2 holes in doped La2-xSrxCuO4 -: art. no. 144501 [J].
Perry, JK ;
Tahir-Kheli, J ;
Goddard, WA .
PHYSICAL REVIEW B, 2002, 65 (14) :1445011-1445017
[32]   Evolution of midgap states and residual three dimensionality in La2-xSrxCuO4 -: art. no. 157601 [J].
Sahrakorpi, S ;
Lindroos, M ;
Markiewicz, RS ;
Bansil, A .
PHYSICAL REVIEW LETTERS, 2005, 95 (15)
[33]   Effect of two gaps on the flux-lattice internal field distribution:: Evidence of two length scales in Mg1-xAlxB2 from μSR -: art. no. 217003 [J].
Serventi, S ;
Allodi, G ;
De Renzi, R ;
Guidi, G ;
Romanò, L ;
Manfrinetti, P ;
Palenzona, A ;
Niedermayer, C ;
Amato, A ;
Baines, C .
PHYSICAL REVIEW LETTERS, 2004, 93 (21)
[34]   Evidence for a nodeless gap from the superfluid density of optimally doped Pr1.855Ce0.145CuO4-y films -: art. no. 207003 [J].
Skinta, JA ;
Lemberger, TR ;
Greibe, T ;
Naito, M .
PHYSICAL REVIEW LETTERS, 2002, 88 (20)
[35]   μSR studies of the vortex state in type-II superconductors [J].
Sonier, JE ;
Brewer, JH ;
Kiefl, RF .
REVIEWS OF MODERN PHYSICS, 2000, 72 (03) :769-811
[36]   SPIN PSEUDOGAP AND INTERPLANE COUPLING IN Y2BA4CU7O15 - A CU-63 NUCLEAR SPIN-SPIN RELAXATION STUDY [J].
STERN, R ;
MALI, M ;
ROOS, J ;
BRINKMANN, D .
PHYSICAL REVIEW B, 1995, 51 (21) :15478-15483
[37]   BARDEEN-COOPER-SCHRIEFFER THEORY OF SUPERCONDUCTIVITY IN THE CASE OF OVERLAPPING BANDS [J].
SUHL, H ;
MATTHIAS, BT ;
WALKER, LR .
PHYSICAL REVIEW LETTERS, 1959, 3 (12) :552-554
[38]   INTERPLANE CHARGE DYNAMICS IN LA2-XSRXCUO4 [J].
TAMASAKU, K ;
ITO, T ;
TAKAGI, H ;
UCHIDA, S .
PHYSICAL REVIEW LETTERS, 1994, 72 (19) :3088-3091
[39]   PAIRING SYMMETRY AND FLUX-QUANTIZATION IN A TRICRYSTAL SUPERCONDUCTING RING OF YBA2CU3O7-DELTA [J].
TSUEI, CC ;
KIRTLEY, JR ;
CHI, CC ;
YUJAHNES, LS ;
GUPTA, A ;
SHAW, T ;
SUN, JZ ;
KETCHEN, MB .
PHYSICAL REVIEW LETTERS, 1994, 73 (04) :593-596
[40]   Superfluid anisotropy in YBCO: Evidence for pair tunneling superconductivity [J].
Xiang, T ;
Wheatley, JM .
PHYSICAL REVIEW LETTERS, 1996, 76 (01) :134-137
12345