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Chin. Phys. B, 2009, Vol. 18(10): 4430-4436    DOI: 10.1088/1674-1056/18/10/054
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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)
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
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.
Keywords:  magnetization      de Haas--van Alphen oscillations      edge state      Rashba spin-orbit coupling      heavy holes  
Received:  08 March 2009      Revised:  17 April 2009      Accepted manuscript online: 
PACS:  75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)  
  71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)  
  75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos 60821061, 60776061, 10604010 and 60776063).

Cite this article: 

Fang Cheng(方诚), Wang Zhi-Gang(王志刚), Li Shu-Shen(李树深), and Zhang Ping(张平) Magnetization of two-dimensional heavy holes with boundaries in a perpendicular magnetic field 2009 Chin. Phys. B 18 4430

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