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

研究成果: 雜誌貢獻文章

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 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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    Hang, D. R., Huang, C. F., Hung, W. K., Chang, Y. H., Chen, J. C., Yang, H. C., Chen, Y. F., Shih, D. K., Chu, T. Y., & Lin, H. H. (2002). Shubnikov-de Haas oscillations of two-dimensional electron gas in an InAsN/InGaAs single quantum well. Semiconductor Science and Technology, 17(9), 999-1003. https://doi.org/10.1088/0268-1242/17/9/317