中国物理B ›› 2005, Vol. 14 ›› Issue (10): 2100-2105.doi: 10.1088/1009-1963/14/10/029

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Quantum spin transport through Aharonov--Bohm ring with a tangent magnetic field

李志坚   

  1. Institute of Theoretical Physics, Shanxi University,Taiyuan 030006, China
  • 收稿日期:2005-04-08 修回日期:2005-06-06 出版日期:2005-10-20 发布日期:2005-10-20
  • 基金资助:
    Project supported by the Youth Science Foundation of Shanxi Province, China (Grant No 20031003).

Quantum spin transport through Aharonov--Bohm ring with a tangent magnetic field

Li Zhi-Jian (李志坚)   

  1. Institute of Theoretical Physics, Shanxi University,Taiyuan 030006, China
  • Received:2005-04-08 Revised:2005-06-06 Online:2005-10-20 Published:2005-10-20
  • Supported by:
    Project supported by the Youth Science Foundation of Shanxi Province, China (Grant No 20031003).

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摘要： Quantum spin transport in a mesoscopic Aharonov--Bohm ring with two leads subject to a magnetic field with circular configuration is investigated by means of one-dimensional quantum waveguide theory.Within the framework of Landauer--B\"{u}ttiker formalism, the polarization direction of transmitted electrons can be controlled either by the AB magnetic flux or by the tangent magnetic field. In particular, the spin flips can be induced by hopping the AB magnetic flux or the tangent field.

关键词: quantum spin transport, Aharonov--Bohm ring, quantum waveguide theory

Abstract: Quantum spin transport in a mesoscopic Aharonov--Bohm ring with two leads subject to a magnetic field with circular configuration is investigated by means of one-dimensional quantum waveguide theory.Within the framework of Landauer--B$\ddot{\rm u}$ttiker formalism, the polarization direction of transmitted electrons can be controlled either by the AB magnetic flux or by the tangent magnetic field. In particular, the spin flips can be induced by hopping the AB magnetic flux or the tangent field.

Key words: quantum spin transport, Aharonov--Bohm ring, quantum waveguide theory

中图分类号:  (Electronic transport in mesoscopic systems)

  • 73.23.-b
72.10.-d (Theory of electronic transport; scattering mechanisms) 03.65.Ta (Foundations of quantum mechanics; measurement theory)