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

[1] ELECTRONIC-PROPERTIES OF TWO-DIMENSIONAL SYSTEMS [J].

ANDO, T ;

FOWLER, AB ;

STERN, F .

REVIEWS OF MODERN PHYSICS, 1982, 54 (02) :437-672

[2] Nature of electron states and symmetry breaking in quantum point contacts according to the local spin density approximation [J].

Berggren, Karl-Fredrik ;

Yakimenko, Irina I. .

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

[3] QUANTIZED TRANSMISSION OF A SADDLE-POINT CONSTRICTION [J].

BUTTIKER, M .

PHYSICAL REVIEW B, 1990, 41 (11) :7906-7909

[4] Transition between quantum states in a parallel-coupled double quantum dot [J].

Chen, JC ;

Chang, AM ;

Melloch, MR .

PHYSICAL REVIEW LETTERS, 2004, 92 (17) :176801-1

[5] Non-Kondo zero-bias anomaly in quantum wires [J].

Chen, T. -M. ;

Graham, A. C. ;

Pepper, M. ;

Farrer, I. ;

Ritchie, D. A. .

PHYSICAL REVIEW B, 2009, 79 (15)

[6] High-quality quantum point contacts in GaN/AlGaN heterostructures -: art. no. 073108 [J].

Chou, HT ;

Lüscher, S ;

Goldhaber-Gordon, D ;

Manfra, MJ ;

Sergent, AM ;

West, KW ;

Molnar, RJ .

APPLIED PHYSICS LETTERS, 2005, 86 (07) :1-3

[7] Low-temperature fate of the 0.7 structure in a point contact: A Kondo-like correlated state in an open system [J].

Cronenwett, SM ;

Lynch, HJ ;

Goldhaber-Gordon, D ;

Kouwenhoven, LP ;

Marcus, CM ;

Hirose, K ;

Wingreen, NS ;

Umansky, V .

PHYSICAL REVIEW LETTERS, 2002, 88 (22) :226805/1-226805/4

[8] A tunable Kondo effect in quantum dots [J].

Cronenwett, SM ;

Oosterkamp, TH ;

Kouwenhoven, LP .

SCIENCE, 1998, 281 (5376) :540-544

[9]

CRONENWETT SM, 2001, THESIS STANFORD U, P75708

[10] Zero-field Kondo splitting and quantum-critical transition in double quantum dots [J].

Dias da Silva, Luis G. G. V. ;

Sandler, Nancy P. ;

Ingersent, Kevin ;

Ulloa, Sergio E. .

PHYSICAL REVIEW LETTERS, 2006, 97 (09)

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