Quantum transport in nonuniform magnetic fields: Aharonov-Bohm ring as a spin switch

被引：131

作者：

Frustaglia, D

Hentschel, M

Richter, K

机构：

[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.87.256602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study spin-dependent magnetoconductance in mesoscopic rings subject to an inhomogeneous in-plane magnetic field. We show that the polarization direction of transmitted spin-polarized electrons can be controlled via an additional magnetic flux such that spin flips are induced at half a flux quantum. This quantum interference effect is independent of the strength of the nonuniform field applied. We give an analytical explanation for one-dimensional rings and numerical results for corresponding ballistic micro structures.

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页码：256602 / 1

页数：4

相关论文

共 26 条

[1] PHASE-CHANGE DURING A CYCLIC QUANTUM EVOLUTION [J].

AHARONOV, Y ;

ANANDAN, J .

PHYSICAL REVIEW LETTERS, 1987, 58 (16) :1593-1596

[2] QUANTAL PHASE-FACTORS ACCOMPANYING ADIABATIC CHANGES [J].

BERRY, MV .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1984, 392 (1802) :45-57

[3] QUANTUM OSCILLATIONS IN ONE-DIMENSIONAL NORMAL-METAL RINGS [J].

BUTTIKER, M ;

IMRY, Y ;

AZBEL, MY .

PHYSICAL REVIEW A, 1984, 30 (04) :1982-1989

[4] Spintronics: electron spin coherence, entanglement, and transport [J].

Das Sarma, S ;

Fabian, J ;

Hu, XD ;

Zutic, I .

SUPERLATTICES AND MICROSTRUCTURES, 2000, 27 (5-6) :289-295

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

DATTA, S ;

DAS, B .

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

[6] Scattering of electrons at a magnetic protuberance of submicron size [J].

Dubonos, SV ;

Geim, AK ;

Novoselov, KS ;

Lok, JGS ;

Maan, JC ;

Henini, M .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2000, 6 (1-4) :746-750

[7] Injection and detection of a spin-polarized current in a light-emitting diode [J].

Fiederling, R ;

Keim, M ;

Reuscher, G ;

Ossau, W ;

Schmidt, G ;

Waag, A ;

Molenkamp, LW .

NATURE, 1999, 402 (6763) :787-790

[8] Ballistic quantum transport: Effect of geometrical phases [J].

Frustaglia, D ;

Richter, K .

FOUNDATIONS OF PHYSICS, 2001, 31 (02) :399-421

[9] Application of split-gate structures as tunable spin filters [J].

Gilbert, MJ ;

Bird, JP .

APPLIED PHYSICS LETTERS, 2000, 77 (07) :1050-1052

[10] Observation of spin injection at a ferromagnet-semiconductor interface [J].

Hammar, PR ;

Bennett, BR ;

Yang, MJ ;

Johnson, M .

PHYSICAL REVIEW LETTERS, 1999, 83 (01) :203-206