On the Determination of Electron Effective Mass in 2DEGs in Gallium Nitride HEMT Structures

  • Manna Kumari Mishra
  • Rachna Manchanda
  • Sushil Lamba
  • O. P. Thakur
  • R. K. Sharma
  • R. Muralidharan
Conference paper
Part of the Environmental Science and Engineering book series (ESE)

Abstract

Temperature dependence of the Shubnikov de Haas oscillation observed in the temperature range of 1.8–6 K due to doubly occupied subbands in the two-dimensional electron gas (2DEG) in AlGaN/GaN HEMT structures grown by MBE inhouse has been used to determine the effective mass m* using a novel method of nonlinear curve fitting method which is assigned to be more accurate which is reflected by the R-squared value of the fitting than discussed by previous workers using conventional approximation in linear-curve fitting model. Also the range in which the approximation of the conventional method is valid has been found out.

Keywords

GaN HEMT Effective mass and Shubnikov de Haas oscillation 

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Notes

Acknowledgments

The corresponding author acknowledges the DST financial assistance received under the grant No.DST/INSPIRE Fellowship/2012/347. The Authors would like to thank Dr. Raghvendra Sahai Saxena, SSPL, Delhi for his useful contribution.

References

  1. 1.
    L. Hsu, W. Walukiewicz, Phys. Rev. B, 56, 3 (1997)Google Scholar
  2. 2.
    A.Saxler, et.al MRS-Proceedings/Volume-595/1999Google Scholar
  3. 3.
    M. J. Manfra, S. H. Simon, K. W. Baldwin, A. M. Sergent, and K. W. West, R. J. Molnar and J. Caissie, Appl. Phy. Letters, VOL. 85, 22 (2004)Google Scholar
  4. 4.
    T. Y. Lin,et al, Phy. Rev. B,. 58, 20, (1998)Google Scholar
  5. 5.
    T. Hofmann, P. Kuhne, S. Schoche, Jr-Tai Chen, U. Forsberg, E. Janzen, N. Ben Sedrine, C. M. Herzinger, J. A. Woollam, M. Schubert, and V. Darakchieva, Appl. Phy. Letters, VOL. 101, 192102 (2012)Google Scholar

Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Manna Kumari Mishra
    • 1
    • 2
  • Rachna Manchanda
    • 1
  • Sushil Lamba
    • 1
  • O. P. Thakur
    • 2
  • R. K. Sharma
    • 1
  • R. Muralidharan
    • 1
  1. 1.Solid State Physics LaboratoryTimarpurIndia
  2. 2.Netaji Subhas Institute of TechnologyDwarkaIndia

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