75As NMR studies of superconducting LaFeAsO0.9F0.1

被引：254

作者：

Grafe, H. -J. ^{[1
]}

Paar, D. ^{[1
,2
]}

Lang, G. ^{[1
]}

Curro, N. J. ^{[3
]}

Behr, G. ^{[1
]}

Werner, J. ^{[1
]}

Hamann-Borrero, J. ^{[1
]}

Hess, C. ^{[1
]}

Leps, N. ^{[1
]}

Klingeler, R. ^{[1
]}

Buechner, B. ^{[1
]}

机构：

[1] Inst Solid State Res, IFW Dresden, D-01171 Dresden, Germany

[2] Univ Zagreb, Fac Sci, Dept Phys, HR-10002 Zagreb, Croatia

[3] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.101.047003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have performed (75)As nuclear magnetic resonance measurements on aligned powders of the new LaFeAsO(0.9)F(0.1) superconductor. In the normal state, we find a strong temperature dependence of the spin shift and Korringa behavior of the spin lattice relaxation rate. In the superconducting state, we find evidence for line nodes in the superconducting gap and spin-singlet pairing. Our measurements reveal a strong anisotropy of the spin lattice relaxation rate, which suggests that superconducting vortices contribute to the relaxation rate when the field is parallel to the c axis but not for the perpendicular direction.

引用

页数：4

共 26 条

[1]

AHILAN K, ARXIV08044026

[2] Y-89 NMR EVIDENCE FOR A FERMI-LIQUID BEHAVIOR IN YBA2CU3O6+X [J].

ALLOUL, H ;

OHNO, T ;

MENDELS, P .

PHYSICAL REVIEW LETTERS, 1989, 63 (16) :1700-1703

[3] SINGLE-SPIN FLUID, SPIN GAP, AND D-WAVE PAIRING IN YBA2CU4O8 - A NMR AND NQR STUDY [J].

BANKAY, M ;

MALI, M ;

ROOS, J ;

BRINKMANN, D .

PHYSICAL REVIEW B, 1994, 50 (09) :6416-6425

[4] MAGNETIC SCALING IN CUPRATE SUPERCONDUCTORS [J].

BARZYKIN, V ;

PINES, D .

PHYSICAL REVIEW B, 1995, 52 (18) :13585-13600

[5]

BOERI L, ARXIV08032703

[6] MAGNETIC-RESONANCE SPECTRAL RECONSTRUCTION USING FREQUENCY-SHIFTED AND SUMMED FOURIER-TRANSFORM PROCESSING [J].

CLARK, WG ;

HANSON, ME ;

LEFLOCH, F ;

SEGRANSAN, P .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1995, 66 (03) :2453-2464

[7] Scaling and the magnetic origin of emergent behavior in correlated electron superconductors [J].

Curro, N ;

Fisk, Z ;

Pines, D .

MRS BULLETIN, 2005, 30 (06) :442-446

[8] Unconventional superconductivity in PuCoGa5 [J].

Curro, NJ ;

Caldwell, T ;

Bauer, ED ;

Morales, LA ;

Graf, MJ ;

Bang, Y ;

Balatsky, AV ;

Thompson, JD ;

Sarrao, JL .

NATURE, 2005, 434 (7033) :622-625

[9] High-temperature Cu-63(2) nuclear quadrupole and magnetic resonance measurements of YBa2Cu4O8 [J].

Curro, NJ ;

Imai, T ;

Slichter, CP ;

Dabrowski, B .

PHYSICAL REVIEW B, 1997, 56 (02) :877-885

[10] Local-field dependence of the 17O spin-lattice relaxation and echo decay rates in the mixed state of YBa2Cu3O7 [J].

Curro, NJ ;

Milling, C ;

Haase, J ;

Slichter, CP .

PHYSICAL REVIEW B, 2000, 62 (05) :3473-3479

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