Original Paper

Anisotropy of the Γ-point effective mass and mobility in hexagonal InN

  1. T. Hofmann1,*,
  2. T. Chavdarov1,
  3. V. Darakchieva2,
  4. H. Lu3,
  5. W. J. Schaff3,
  6. M. Schubert4

Article first published online: 15 MAY 2006

DOI: 10.1002/pssc.200565467

Issue

physica status solidi (c)

physica status solidi (c)

Volume 3, Issue 6, pages 1854–1857, June 2006

Additional Information

How to Cite

Hofmann, T., Chavdarov, T., Darakchieva, V., Lu, H., Schaff, W. J. and Schubert, M. (2006), Anisotropy of the Γ-point effective mass and mobility in hexagonal InN. Phys. Status Solidi C, 3: 1854–1857. doi: 10.1002/pssc.200565467

Author Information

  1. 1

    Institut für Experimentelle Physik II, Universität Leipzig, 04103 Leipzig, Germany

  2. 2

    Department of Physics and Measurement Technology, Linköping University, 581 83 Linköping, Sweden

  3. 3

    Department of Electrical and Computer Engineering, Cornell University, USA

  4. 4

    Department of Electrical Engineering and Center for Materials Research and Analysis (CMRA), University of Nebraska-Lincoln, Lincoln, USA

*Phone: +49 341 9732 694, Fax: +49 341 9732 699

Publication History

  1. Issue published online: 12 JUN 2006
  2. Article first published online: 15 MAY 2006
  3. Manuscript Accepted: 23 DEC 2005
  4. Manuscript Received: 24 OCT 2005

SEARCH

SEARCH BY CITATION

ARTICLE TOOLS

Get PDF (247K)

Keywords:

  • 73.50.Dn;
  • 78.20.Ls;
  • 78.30.Fs;
  • 78.66.Fd

Abstract

We determine the anisotropic electron effective mass and mobility parameters in wurtzite InN thin films with free electron concentration N from 1.8 × 1017 cm–3 to 9.5 × 1018 cm–3 using Infrared Magneto-optic Generalized Ellipsometry. The room-temperature measurements were carried out with magnetic fields up to 4.5 T. For the Γ-point we estimate m*⊥ = 0.047m0 and m*‖ = 0.039m0 for polarization perpendicular and parallel to the c -axis, respectively. Scattering by impurities or ionized donors may explain the decrease of mobility for polarization parallel to the c -axis from 1600 cm2/(Vs) to 800 cm2/(Vs) with increase in N , where the perpendicular mobility is further decreased, likely caused by additional grain boundary scattering. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Get PDF (247K)