中国物理B ›› 2008, Vol. 17 ›› Issue (1): 296-302.doi: 10.1088/1674-1056/17/1/052

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Spin-flip process through double quantum dots coupled to two half-metallic ferromagnetic leads

闫从华1, 吴绍全1, 孙威立1, 黄睿2   

  1. (1)College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, China; (2)College of Sciences of Southwest Petroleum University, Chengdu 610500, China
  • 出版日期:2008-01-20 发布日期:2008-01-20
  • 基金资助:
    Project supported by Scientific Research Fund of Sichuan Provincial Education Department of China (Grant No 2006A069) and Funds for Major Basic Research Project of Sichuan Province, China (Grant No 2006J13-155).

Spin-flip process through double quantum dots coupled to two half-metallic ferromagnetic leads

Yan Cong-Hua(闫从华)a)†,Wu Shao-Quan(吴绍全)a), Huang Rui(黄睿)b), and Sun Wei-Li(孙威立)a)   

  1. a College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, China; b College of Sciences of Southwest Petroleum University, Chengdu 610500, China
  • Online:2008-01-20 Published:2008-01-20
  • Supported by:
    Project supported by Scientific Research Fund of Sichuan Provincial Education Department of China (Grant No 2006A069) and Funds for Major Basic Research Project of Sichuan Province, China (Grant No 2006J13-155).

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摘要： We investigate the spin-flip process through double quantum dots coupled to two half-metallic ferromagnetic leads in series. By means of the slave-boson mean-field approximation, we calculate the density of states in the Kondo regime for two different configurations of the leads. It is found that the transport shows some remarkable properties depending on the spin-flip strength. These effects may be useful in exploiting the role of electronic correlation in spintronics.

Abstract: We investigate the spin-flip process through double quantum dots coupled to two half-metallic ferromagnetic leads in series. By means of the slave-boson mean-field approximation, we calculate the density of states in the Kondo regime for two different configurations of the leads. It is found that the transport shows some remarkable properties depending on the spin-flip strength. These effects may be useful in exploiting the role of electronic correlation in spintronics.

Key words: spin-flip, double quantum dots, half-metallic ferromagnetic leads

中图分类号:  (Surface states, band structure, electron density of states)

  • 73.20.At
73.21.La (Quantum dots) 75.30.Mb (Valence fluctuation, Kondo lattice, and heavy-fermion phenomena) 75.50.Cc (Other ferromagnetic metals and alloys) 72.25.Mk (Spin transport through interfaces)