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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)999-1003
Number of pages5
JournalSemiconductor Science and Technology
Volume17
Issue number9
DOIs
Publication statusPublished - 2002 Sep
Externally publishedYes

ASJC Scopus subject areas

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

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