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Chinese Physics, 2005, Vol. 14(10): 2100-2105    DOI: 10.1088/1009-1963/14/10/029
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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

Li Zhi-Jian (李志坚)
Institute of Theoretical Physics, Shanxi University,Taiyuan 030006, China
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.
Keywords:  quantum spin transport      Aharonov--Bohm ring      quantum waveguide theory  
Received:  08 April 2005      Revised:  06 June 2005      Accepted manuscript online: 
PACS:  73.23.-b (Electronic transport in mesoscopic systems)  
  72.10.-d (Theory of electronic transport; scattering mechanisms)  
  03.65.Ta (Foundations of quantum mechanics; measurement theory)  
Fund: Project supported by the Youth Science Foundation of Shanxi Province, China (Grant No 20031003).

Cite this article: 

Li Zhi-Jian (李志坚) Quantum spin transport through Aharonov--Bohm ring with a tangent magnetic field 2005 Chinese Physics 14 2100

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