中国物理B ›› 2011, Vol. 20 ›› Issue (6): 67201-067201.doi: 10.1088/1674-1056/20/6/067201

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

Spin-dependent Breit–Wigner and Fano resonances in photon-assisted electron transport through a semiconductor heterostructure

胡丽云, 周斌   

  1. Department of Physics, Hubei University, Wuhan 430062, China
  • 收稿日期:2010-08-10 修回日期:2011-02-25 出版日期:2011-06-15 发布日期:2011-06-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10974046), Natural Science Foundation of Hubei Province of China (Grant No. 2009CDB360), and the Key Project of Education Department of Hubei Province of China (Grant No. D20101004).

Spin-dependent Breit–Wigner and Fano resonances in photon-assisted electron transport through a semiconductor heterostructure

Hu Li-Yun(胡丽云) and Zhou Bin(周斌)   

  1. Department of Physics, Hubei University, Wuhan 430062, China
  • Received:2010-08-10 Revised:2011-02-25 Online:2011-06-15 Published:2011-06-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10974046), Natural Science Foundation of Hubei Province of China (Grant No. 2009CDB360), and the Key Project of Education Department of Hubei Province of China (Grant No. D20101004).

摘要: We theoretically investigate the electron transmission through a seven-layer semiconductor heterostructure with the Dresselhaus spin-orbit coupling under two applied oscillating fields. Numerical results show that both of the spin-dependent symmetric Breit-Wigner and the asymmetric Fano resonances appear and that the properties of these two types of resonance peaks are dependent on the amplitude and the relative phases of the two applied oscillating fields. The modulation of the spin-polarization efficiency of transmitted electrons by the relative phase is also discussed.

Abstract: We theoretically investigate the electron transmission through a seven-layer semiconductor heterostructure with the Dresselhaus spin-orbit coupling under two applied oscillating fields. Numerical results show that both of the spin-dependent symmetric Breit-Wigner and the asymmetric Fano resonances appear and that the properties of these two types of resonance peaks are dependent on the amplitude and the relative phases of the two applied oscillating fields. The modulation of the spin-polarization efficiency of transmitted electrons by the relative phase is also discussed.

Key words: spin-orbit coupling, Breit-Wigner resonance, Fano resonance

中图分类号:  (Spin polarized transport in semiconductors)

  • 72.25.Dc
71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect) 85.75.Mm (Spin polarized resonant tunnel junctions)