Observation of linear and quadratic magnetic field-dependence of magneto-photocurrents in InAs/GaSb superlattice

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• 作者：Yuan Li (6)
  Yu Liu (6)
  Chongyun Jiang (6)
  Laipan Zhu (6)
  Xudong Qin (6)
  Hansong Gao (6)
  Wenquan Ma (7)
  Xiaolu Guo (7)
  Yanhua Zhang (7)
  Yonghai Chen (6)
  
  6. Key Laboratory of Semiconductor Materials Science ; Institute of Semiconductors ; Chinese Academy of Sciences ; No.A35 ; Tshinghua East Road ; Haidian District ; Beijing ; 100083 ; China
  7. Laboratory of Nano-Optoelectronics ; Institute of Semiconductors ; Chinese Academy of Sciences ; No.A35 ; Tshinghua East Road ; Haidian District ; Beijing ; 100083 ; China
  
• 关键词：Magneto ; photocurrents ; Asymmetric excitation and relaxation ; Spin ; orbit interaction
• 刊名：Nanoscale Research Letters
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：9
• 期：1
• 全文大小：523 KB
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• 刊物主题：Nanotechnology; Nanotechnology and Microengineering; Nanoscale Science and Technology; Nanochemistry; Molecular Medicine;
• 出版者：Springer US
• ISSN：1556-276X

文摘

We experimentally studied the magneto-photocurrents generated by direct interband transition in InAs/GaSb type II superlattice. By varying the magnetic field direction, we observed that an in-plane magnetic field induces a photocurrent linearly proportional to the magnetic field; however, a magnetic field tilted to the sample plane induces a photocurrent presenting quadratic magnetic field dependence. The magneto-photocurrents in both conditions are insensitive to the polarization state of the incident light. Theoretical models involving excitation, relaxation and Hall effect are utilized to explain the experimental results.