Quasiparticle excitation in and around the vortex core of underdoped YBa2Cu4O8 studied by site-selective NMR -: art. no. 060503

被引：64

作者：

Kakuyanagi, K ^{[1
]}

Kumagai, K

Matsuda, Y

机构：

[1] Hokkaido Univ, Grad Sch Sci, Div Phys, Kita Ku, Sapporo, Hokkaido 0600810, Japan

[2] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.65.060503

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a site-selective O-17 spin-lattice relaxation rate T-1(-1) in the vortex state of underdoped YBa2Cu4O8, We found that T-1(-1) at the planar sites exhibits an unusual nonmonotonic NMR frequency dependence. In the region well outside the vortex core, T-1(-1) cannot be simply explained by the density of states of the Doppler-shifted quasiparticles in the d-wave superconductor. Based on T-1(-1) in the vortex core region, we establish strong evidence that the local density of states within the vortex core is strongly reduced.

引用

页码：1 / 4

页数：4

共 35 条

[1] SO(5) theory of insulating vortex cores in high-Tc materials [J].

Andersen, BM ;

Bruus, H ;

Hedegård, P .

PHYSICAL REVIEW B, 2000, 61 (09) :6298-6302

[2] Superconducting vortex with antiferromagnetic core [J].

Arovas, DP ;

Berlinsky, AJ ;

Kallin, C ;

Zhang, SC .

PHYSICAL REVIEW LETTERS, 1997, 79 (15) :2871-2874

[3] Evidence for field-induced excitations in low-temperature thermal conductivity of Bi2Sr2CaCu2O8 [J].

Aubin, H ;

Behnia, K ;

Ooi, S ;

Tamegai, T .

PHYSICAL REVIEW LETTERS, 1999, 82 (03) :624-627

[4] 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

[5] EFFECT OF VORTEX FLUCTUATIONS ON TL-205 SPIN-LATTICE RELAXATION IN THE MIXED-STATE OF TL2BA2CUO6 [J].

BULAEVSKII, LN ;

KOLESNIKOV, NN ;

SCHEGOLEV, IF ;

VYASELEV, OM .

PHYSICAL REVIEW LETTERS, 1993, 71 (12) :1891-1894

[6] WEAK-COUPLING MODEL OF SPIN FLUCTUATIONS IN THE SUPERCONDUCTING STATE OF THE LAYERED CUPRATES [J].

BULUT, N ;

SCALAPINO, DJ .

PHYSICAL REVIEW B, 1992, 45 (05) :2371-2384

[7] Low-energy quasiparticles in cuprate superconductors: A quantitative analysis [J].

Chiao, M ;

Hill, RW ;

Lupien, C ;

Taillefer, L ;

Lambert, P ;

Gagnon, R ;

Fournier, P .

PHYSICAL REVIEW B, 2000, 62 (05) :3554-3558

[8] 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

[9] Quasiparticle spectra in the vicinity of a d-wave vortex [J].

Franz, M ;

Tesanovic, Z .

PHYSICAL REVIEW B, 1999, 60 (05) :3581-3588

[10] Self-consistent electronic structure of a dx2-y2 and a dx2-y2+idxy vortex [J].

Franz, M ;

Tesanovic, Z .

PHYSICAL REVIEW LETTERS, 1998, 80 (21) :4763-4766

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