Zero-bias anomaly in quantum wires

被引：42

作者：

Sarkozy, S. ^{[1
]}

Sfigakis, F. ^{[1
]}

Das Gupta, K. ^{[1
]}

Farrer, I. ^{[1
]}

Ritchie, D. A. ^{[1
]}

Jones, G. A. C. ^{[1
]}

Pepper, M. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 16期

基金：

英国工程与自然科学研究理事会;

关键词：

gallium arsenide; Kondo effect; semiconductor heterojunctions; semiconductor quantum wires; spin polarised transport; Zeeman effect; SADDLE-POINT CONSTRICTION; DIMENSIONAL ELECTRON-GAS; CONDUCTANCE; CONTACTS; TRANSPORT; LIMIT; DOTS;

D O I：

10.1103/PhysRevB.79.161307

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use quantum wires fabricated on undoped GaAs/AlGaAs heterostructures in which the average impurity separation is greater than the device size to compare the behavior of the zero-bias anomaly against predictions from Kondo and spin-polarization models. Both theories display shortcomings, the most dramatic of which is the linear electron-density dependence of the zero-bias anomaly spin splitting at fixed magnetic field B and the suppression of the Zeeman effect at pinch off.

引用

页数：4

共 39 条

[11]

GLAZMAN LI, 1988, JETP LETT+, V47, P452

[12] SCATTERING TIME AND SINGLE-PARTICLE RELAXATION-TIME IN A DISORDERED TWO-DIMENSIONAL ELECTRON-GAS [J].

GOLD, A .

PHYSICAL REVIEW B, 1988, 38 (15) :10798-10811

[13] Kondo effect in a single-electron transistor [J].

Goldhaber-Gordon, D ;

Shtrikman, H ;

Mahalu, D ;

Abusch-Magder, D ;

Meirav, U ;

Kastner, MA .

NATURE, 1998, 391 (6663) :156-159

[14] Energy-level pinning and the 0.7 spin state in one dimension: GaAs quantum wires studied using finite-bias spectroscopy [J].

Graham, A. C. ;

Sawkey, D. L. ;

Pepper, M. ;

Simmons, M. Y. ;

Ritchie, D. A. .

PHYSICAL REVIEW B, 2007, 75 (03)

[15]

GRIFFITHS JP, 2009, THESIS U CAMBRIDGE, P75708

[16] Fabrication of high-quality one- and two-dimensional electron gases in undoped GaAs/AlGaAs heterostructures [J].

Harrell, RH ;

Pyshkin, KS ;

Simmons, MY ;

Ritchie, DA ;

Ford, CJB ;

Jones, GAC ;

Pepper, M .

APPLIED PHYSICS LETTERS, 1999, 74 (16) :2328-2330

[17] The Kondo effect in an artificial quantum dot molecule [J].

Jeong, H ;

Chang, AM ;

Melloch, MR .

SCIENCE, 2001, 293 (5538) :2221-2223

[18] Measurements of Kondo and spin splitting in single-electron transistors [J].

Kogan, A ;

Amasha, S ;

Goldhaber-Gordon, D ;

Granger, G ;

Kastner, MA ;

Shtrikman, H .

PHYSICAL REVIEW LETTERS, 2004, 93 (16) :166602-1

[19] Bias and temperature dependence of the 0.7 conductance anomaly in quantum point contacts [J].

Kristensen, A ;

Bruus, H ;

Hansen, AE ;

Jensen, JB ;

Lindelof, PE ;

Marckmann, CJ ;

Nygard, J ;

Sorensen, CB ;

Beuscher, F ;

Forchel, A ;

Michel, M .

PHYSICAL REVIEW B, 2000, 62 (16) :10950-10957

[20] Measured deviations from the saddle potential description of clean quantum point contacts [J].

Lindelof, Poul Erik ;

Aagesen, Martin .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2008, 20 (16)

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