Shubnikov-de Haas oscillations of two-dimensional electron gas in an InAsN/InGaAs single quantum well

D. R. Hang*, C. F. Huang, W. K. Hung, Y. H. Chang, J. C. Chen, H. C. Yang, Y. F. Chen, D. K. Shih, T. Y. Chu, H. H. Lin

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

12 引文 斯高帕斯(Scopus)

摘要

We present the first investigation of Shubnikov-de Haas (SdH) oscillations of two-dimensional electron gas formed in an InAsN/InGaAs single quantum well (QW) grown on an InP substrate using gas source molecular beam epitaxy and a radio-frequency (rf) plasma nitrogen source. The photoluminescence (PL) peak energy of the InAsN/InGaAs QW decreases compared with that of InAs/InGaAs QW. This agrees with the bowing effect due to the incorporation of nitrogen atoms. The nitrogen content can be estimated to be 0.4% using the PL peak positions as well as x-ray diffraction. From the SdH oscillations, the carrier concentration is 2.85 × 1011 cm-2 and the effective mass is 0.1 ± 0.01 m0. The enhancement of the effective mass is mainly due to the incorporation of the nitrogen atoms in the InAs lattice, which is consistent with a recent study on InAsN bulk alloys. The large increase of the effective mass cannot be explained by the simple band anticrossing model. In addition, we observe a temperature-independent magnetoresistivity at a critical magnetic field. Our analysis supports the fact that the value of the critical exponent in the quantum Hall effect is not universal.

原文英語
頁(從 - 到)999-1003
頁數5
期刊Semiconductor Science and Technology
17
發行號9
DOIs
出版狀態已發佈 - 2002 九月

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 電氣與電子工程
  • 材料化學

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