中国物理B ›› 2009, Vol. 18 ›› Issue (10): 4430-4436.doi: 10.1088/1674-1056/18/10/054

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Magnetization of two-dimensional heavy holes with boundaries in a perpendicular magnetic field

王志刚1, 张平2, 李树深3, 方诚4   

  1. (1)Institute of Applied Physics and Computational Mathematics, Beijing 100088, China; (2)Institute of Applied Physics and Computational Mathematics, Beijing 100088, China \sjd) Center for Applied Physics and Technology, Peking University, Beijing 100871, China; (3)State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; (4)State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;Physics Department, East China Institute of Technology, Fuzhou 344000, Jiangxi Province, China;Institute of Applied
  • 收稿日期:2009-03-08 修回日期:2009-04-17 出版日期:2009-10-20 发布日期:2009-10-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60821061, 60776061, 10604010 and 60776063).

Magnetization of two-dimensional heavy holes with boundaries in a perpendicular magnetic field

Fang Cheng(方诚)a)b)c), Wang Zhi-Gang(王志刚)c), Li Shu-Shen(李树深)a), and Zhang Ping(张平)c)d)†   

  1. a State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; b Physics Department, East China Institute of Technology, Fuzhou 344000, Jiangxi Province, China; c Institute of Applied Physics and Computational Mathematics, Beijing 100088, China; d Center for Applied Physics and Technology, Peking University, Beijing 100871, China
  • Received:2009-03-08 Revised:2009-04-17 Online:2009-10-20 Published:2009-10-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60821061, 60776061, 10604010 and 60776063).

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摘要： The magnetisation of heavy holes in III--V semiconductor quantum wells with Rashba spin-orbit coupling (SOC) in an external perpendicular magnetic field is studied theoretically. We concentrate on the effects on the magnetisation induced by the system boundary, the Rashba SOC and the temperature. It is found that the sawtooth-like de Haas--van Alphen (dHvA) oscillations of the magnetisation will change dramatically in the presence of such three factors. Especially, the effects of the edge states and Rashba SOC on the magnetisation are more evident when the magnetic field is smaller. The oscillation center will shift when the boundary effect is considered and the Rashba SOC will bring beating patterns to the dHvA oscillations. These effects on the dHvA oscillations are preferably observed at low temperatures. With increasing temperature, the dHvA oscillations turn to be blurred and eventually disappear.

Abstract: The magnetisation of heavy holes in III--V semiconductor quantum wells with Rashba spin-orbit coupling (SOC) in an external perpendicular magnetic field is studied theoretically. We concentrate on the effects on the magnetisation induced by the system boundary, the Rashba SOC and the temperature. It is found that the sawtooth-like de Haas--van Alphen (dHvA) oscillations of the magnetisation will change dramatically in the presence of such three factors. Especially, the effects of the edge states and Rashba SOC on the magnetisation are more evident when the magnetic field is smaller. The oscillation center will shift when the boundary effect is considered and the Rashba SOC will bring beating patterns to the dHvA oscillations. These effects on the dHvA oscillations are preferably observed at low temperatures. With increasing temperature, the dHvA oscillations turn to be blurred and eventually disappear.

Key words: magnetization, de Haas--van Alphen oscillations, edge state, Rashba spin-orbit coupling, heavy holes

中图分类号:  (Magnetization curves, hysteresis, Barkhausen and related effects)

  • 75.60.Ej
71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect) 75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))