Confinement of spin-orbit induced Dirac states in quantum point contacts

被引：0

作者：

Li, Tommy ^{[1
]}

机构：

[1] Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 08期

基金：

澳大利亚研究理事会;

关键词：

CONDUCTANCE; ELECTRONS;

D O I：

10.1103/PhysRevB.92.085302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The quantum transmission problem for a particle moving in a quantum point contact in the presence of a Rashba spin-orbit interaction and applied magnetic field is solved semiclassically. A strong Rashba interaction and parallel magnetic field form emergent Dirac states at the center of the constriction, leading to the appearance of resonances which carry spin current and become bound at high magnetic fields. These states can be controlled in situ by modulation of external electric and magnetic fields, and can be used to turn the channel into a spin pump which operates at zero bias. It is shown that this effect is currently experimentally accessible in p-type quantum point contacts.

引用

页数：6

共 39 条

[21] Ballistic spin-polarized transport and Rashba spin precession in semiconductor nanowires [J].

Mireles, F ;

Kirczenow, G .

PHYSICAL REVIEW B, 2001, 64 (02)

[22] Effect of the spin-orbit interaction on the band structure and conductance of quasi-one-dimensional systems [J].

Moroz, AV ;

Barnes, CHW .

PHYSICAL REVIEW B, 1999, 60 (20) :14272-14285

[23] Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices [J].

Mourik, V. ;

Zuo, K. ;

Frolov, S. M. ;

Plissard, S. R. ;

Bakkers, E. P. A. M. ;

Kouwenhoven, L. P. .

SCIENCE, 2012, 336 (6084) :1003-1007

[24] Spin-orbit splitting and effective masses in p-type GaAs two-dimensional hole gases [J].

Nichele, Fabrizio ;

Pal, Atindra Nath ;

Winkler, Roland ;

Gerl, Christian ;

Wegscheider, Werner ;

Ihn, Thomas ;

Ensslin, Klaus .

PHYSICAL REVIEW B, 2014, 89 (08)

[25] Helical Liquids and Majorana Bound States in Quantum Wires [J].

Oreg, Yuval ;

Refael, Gil ;

von Oppen, Felix .

PHYSICAL REVIEW LETTERS, 2010, 105 (17)

[26] EVOLUTION OF HALF PLATEAUS AS A FUNCTION OF ELECTRIC-FIELD IN A BALLISTIC QUASI-ONE-DIMENSIONAL CONSTRICTION [J].

PATEL, NK ;

NICHOLLS, JT ;

MARTINMORENO, L ;

PEPPER, M ;

FROST, JEF ;

RITCHIE, DA ;

JONES, GAC .

PHYSICAL REVIEW B, 1991, 44 (24) :13549-13555

[27] Effect of spin-orbit interaction and in-plane magnetic field on the conductance of a quasi-one-dimensional system [J].

Pershin, YV ;

Nesteroff, JA ;

Privman, V .

PHYSICAL REVIEW B, 2004, 69 (12)

[28] Electron-positron pairs in physics and astrophysics: From heavy nuclei to black holes [J].

Ruffini, Remo ;

Vereshchagin, Gregory ;

Xue, She-Sheng .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2010, 487 (1-4) :1-140

[29] Fano-Rashba effect in a quantum wire [J].

Sanchez, David ;

Serra, Llorenc .

PHYSICAL REVIEW B, 2006, 74 (15)

[30] ON GAUGE INVARIANCE AND VACUUM POLARIZATION [J].

SCHWINGER, J .

PHYSICAL REVIEW, 1951, 82 (05) :664-679

← 1 2 3 4 →