β-detected NMR of 8Li in the normal state of 2H-NbSe2

被引：8

作者：

Wang, D

Hossain, MD

Salman, Z

Arseneau, D

Chow, KH

Daviel, S

Keeler, TA

Kiefl, RF ^{[1
]}

Kreitzman, SR

Levy, CDP

Morris, GD

Miller, RI

MacFarlane, WA

Parolin, TJ

Saadaoui, H

机构：

[1] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[2] Univ British Columbia, TRIUMF, Vancouver, BC V6T 2A3, Canada

[3] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

[4] Univ British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, Canada

来源：

PHYSICA B-CONDENSED MATTER | 2006年 / 374卷

关键词：

beta-detected nuclear magnetic resonance; superconductivity; vortices;

D O I：

10.1016/j.physb.2005.11.064

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

beta-NMR of isolated Li-8 has been investigated in the normal state of 2H-NbSe2. In a high magnetic field of 3 T a single resonance is observed with a Gaussian line width of 3.5 kHz. The line shape varies weakly as function of magnetic field and temperature but has a strong orientation dependence. The nuclear electric quadrupole splitting is unresolved implying that the electric field gradients are 10-100 times smaller than in other non-cubic crystals. The nuclear spin relaxation rate is also anomalously small but varies linearly with temperature as expected for Korringa relaxation in a metal. These results suggest that Li adopts an interstitial position between the weakly coupled NbSe2 layers and away from the conduction band. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：239 / 242

页数：4

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