Breakdown of the Korringa Law of Nuclear Spin Relaxation in Metallic GaAs

被引：16

作者：

Koelbl, Dominikus ^{[1
]}

Zumbuehl, Dominik M. ^{[1
]}

Fuhrer, Andreas ^{[2
]}

Salis, Gian ^{[2
]}

Alvarado, Santos F. ^{[2
]}

机构：

[1] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

[2] IBM Res Corp, Zurich Res Lab, CH-8803 Ruschlikon, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 08期

关键词：

FERMI LIQUID BEHAVIOR; ELECTRICAL DETECTION; MAGNETIC-RESONANCE; LATTICE-RELAXATION; SEMICONDUCTOR; FLUCTUATIONS; POLARIZATION; INJECTION; ELECTRONS; PHASE;

D O I：

10.1103/PhysRevLett.109.086601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present nuclear spin relaxation measurements in GaAs epilayers using a new pump-probe technique in all-electrical, lateral spin-valve devices. The measured T-1 times agree very well with NMR data available for T > 1 K. However, the nuclear spin relaxation rate clearly deviates from the well-established Korringa law expected in metallic samples and follows a sublinear temperature dependence T-1(-1) proportional to T-0.6 for 0.1 K <= T <= 10 K. Further, we investigate nuclear spin inhomogeneities.

引用

页数：5

共 45 条

[1]

Abragam A., 1961, The principles of nuclear magnetism

[2] NUCLEAR SPIN-LATTICE RELAXATION IN METALS [J].

ANDERSON, AG ;

REDFIELD, AG .

PHYSICAL REVIEW, 1959, 116 (03) :583-591

[3] NEW PHASE OF DISORDERED FERMI SYSTEMS [J].

BELITZ, D ;

KIRKPATRICK, TR .

PHYSICAL REVIEW B, 1991, 44 (03) :955-968

[4] ENHANCEMENT OF THE SPIN SUSCEPTIBILITY IN DISORDERED INTERACTING ELECTRONS AND THE METAL-INSULATOR-TRANSITION [J].

CASTELLANI, C ;

DICASTRO, C ;

LEE, PA ;

MA, M ;

SORELLA, S ;

TABET, E .

PHYSICAL REVIEW B, 1986, 33 (09) :6169-6176

[5] Electrical spin injection and detection in lateral all-semiconductor devices [J].

Ciorga, M. ;

Einwanger, A. ;

Wurstbauer, U. ;

Schuh, D. ;

Wegscheider, W. ;

Weiss, D. .

PHYSICAL REVIEW B, 2009, 79 (16)

[6] ELECTRONIC ANALOG OF THE ELECTROOPTIC MODULATOR [J].

DATTA, S ;

DAS, B .

APPLIED PHYSICS LETTERS, 1990, 56 (07) :665-667

[7] Spontaneous spin coherence in n-GaAs produced by ferromagnetic proximity polarization -: art. no. 121202 [J].

Epstein, RJ ;

Malajovich, I ;

Kawakami, RK ;

Chye, Y ;

Hanson, M ;

Petroff, PM ;

Gossard, AC ;

Awschalom, DD .

PHYSICAL REVIEW B, 2002, 65 (12) :1212021-1212024

[8] Optically induced nuclear magnetic field in InP [J].

Farah, W ;

Dyakonov, M ;

Scalbert, D ;

Knap, W .

PHYSICAL REVIEW B, 1998, 57 (08) :4713-4719

[9]

FINKELSHTEIN AM, 1984, JETP LETT+, V40, P796

[10] EFFECTS OF IMPURITIES ON SPIN FLUCTUATIONS IN ALMOST FERROMAGNETIC METALS [J].

FULDE, P ;

LUTHER, A .

PHYSICAL REVIEW, 1968, 170 (02) :570-&

← 1 2 3 4 5 →