中国物理B ›› 2010, Vol. 19 ›› Issue (11): 117501-117501.doi: 10.1088/1674-1056/19/11/117501

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Thermal effect mechanism of magnetoresistance in p-type diamond films

方亮1, 秦国平2, 孔春阳2, 阮海波2, 黄桂娟2, 崔玉亭2   

  1. (1)Department of Applied Physics, Chongqing University, Chongqing 400044, China; (2)Key Laboratory of Optical Engineering, Chongqing Normal University, Chongqing 400047, China
  • 收稿日期:2010-03-22 修回日期:2010-05-17 出版日期:2010-11-15 发布日期:2010-11-15
  • 基金资助:
    Project supported by the Chongqing City Education Commission of China (Grant No. 040804).

Thermal effect mechanism of magnetoresistance in p-type diamond films

Qin Guo-Ping(秦国平)a), Kong Chun-Yang(孔春阳)a)†, Ruan Hai-Bo(阮海波)a), Huang Gui-Juan(黄桂娟)a), Cui Yu-Ting(崔玉亭)a), and Fang Liang(方亮)b)   

  1. a Key Laboratory of Optical Engineering, Chongqing Normal University, Chongqing 400047, China; b Department of Applied Physics, Chongqing University, Chongqing 400044, China
  • Received:2010-03-22 Revised:2010-05-17 Online:2010-11-15 Published:2010-11-15
  • Supported by:
    Project supported by the Chongqing City Education Commission of China (Grant No. 040804).

摘要: Based on the analysis and the discussion of the influence of thermal ionization energy and various scatterings on magnetoresistance(MR) of p-type diamond films, a revised model of valence band split-off over temperature is put forward, and a corresponding calculation formula is given for the MR of p-type diamond films (Corbino discs). It is shown that the theoretical calculation that the MR of diamond films changes with temperature is consistent with the experiment. The influence of Fermi energy level on MR of diamond films is discussed. Additionally, the thermal effect mechanism of MR in p-type diamond films is also explored.

Abstract: Based on the analysis and the discussion of the influence of thermal ionization energy and various scatterings on magnetoresistance(MR) of p-type diamond films, a revised model of valence band split-off over temperature is put forward, and a corresponding calculation formula is given for the MR of p-type diamond films (Corbino discs). It is shown that the theoretical calculation that the MR of diamond films changes with temperature is consistent with the experiment. The influence of Fermi energy level on MR of diamond films is discussed. Additionally, the thermal effect mechanism of MR in p-type diamond films is also explored.

Key words: diamond film, magnetoresistance, valence-band split-off

中图分类号:  (Semiconductor compounds)

  • 71.20.Nr
73.50.Jt (Galvanomagnetic and other magnetotransport effects) 73.61.Cw (Elemental semiconductors)