Spin transport in an Aharonov-Bohm ring with exchange interaction

被引：0

作者：

Savenko, I. G. ^{[1
,2
,3
]}

Polozkov, R. G. ^{[4
]}

Shelykh, I. A. ^{[1
,5
]}

机构：

[1] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland

[2] Aalto Univ, Sch Sci, COMP CoE, Dept Appl Phys, FI-00076 Aalto, Finland

[3] Aalto Univ, Sch Sci, Low Temp Lab OVLL, FI-00076 Aalto, Finland

[4] St Petersburg State Polytech Univ, St Petersburg 195251, Russia

[5] Nanyang Technol Univ, Div Phys & Appl Phys, Singapore 637371, Singapore

来源：

PHYSICAL REVIEW B | 2013年 / 88卷 / 19期

关键词：

ONE-DIMENSIONAL CONSTRICTION; SINGLE-ELECTRON TRANSISTOR; NORMAL-METAL RINGS; OSCILLATIONS; CONDUCTANCE; PHASE; INTERFEROMETER; QUANTIZATION; POLARIZATION; WIRES;

D O I：

10.1103/PhysRevB.88.195430

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate spin-dependent conductance through a quantum Aharonov-Bohm ring containing localized electrons which interact with the propagating flow of electrons via exchange interaction of the ferromagnetic or antiferromagnetic type. We analyze the conductance oscillations as a function of both the chemical potential (particle concentration) and external magnetic field. It is demonstrated that the amplitude of the conductance oscillations in the ballistic regime is determined by the value of the noncompensated spin localized in the ring. The results are in agreement with the concept of fractional quantization of the ballistic conductance, proposed by us earlier

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页数：8

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