中国物理B ›› 2005, Vol. 14 ›› Issue (1): 196-200.doi: 10.1088/1009-1963/14/1/036

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Spin-polarized transport through a double Aharonov-Bohm ring in the presence of magnetic impurity

高迎芳, 张永平, 梁九卿   

  1. Institute of Theoretical Physics, Shanxi University, Taiyuan,030006, China
  • 收稿日期:2004-07-22 修回日期:2004-08-25 出版日期:2005-01-20 发布日期:2005-01-20

Spin-polarized transport through a double Aharonov-Bohm ring in the presence of magnetic impurity

Gao Ying-Fang (高迎芳), Zhang Yong-Ping (张永平), Liang Jiu-Qing (梁九卿)   

  1. Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China
  • Received:2004-07-22 Revised:2004-08-25 Online:2005-01-20 Published:2005-01-20

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摘要： The Aharonov--Bohm (AB) interference oscillations manifested through transmission of an electron in a mesoscopic device with a double-ring in the presence of a magnetic impurity serving as the spin-flipper are studied.The spin-flipper is demonstrated to indeed cause the partial decoherence of the AB interference. Moreover, it is found that the spin-up/down transmission coefficients are asymmetric in the flux reversal while the reflection coefficients as well as that the total transmission coefficient are symmetric.

关键词: spin-polarized transport, Aharonov--Bohm ring, magnetic impurity atom

Abstract: The Aharonov--Bohm (AB) interference oscillations manifested through transmission of an electron in a mesoscopic device with a double-ring in the presence of a magnetic impurity serving as the spin-flipper are studied.The spin-flipper is demonstrated to indeed cause the partial decoherence of the AB interference. Moreover, it is found that the spin-up/down transmission coefficients are asymmetric in the flux reversal while the reflection coefficients as well as that the total transmission coefficient are symmetric.

Key words: spin-polarized transport, Aharonov--Bohm ring, magnetic impurity atom

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  • 7290