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Hot Electron Transport in AlN

Published online by Cambridge University Press:  17 March 2011

Ramón Collazo ,
Raoul Schlesser ,
Amy Roskowski ,
Robert F. Davis  and
Z. Sitar
Ramón Collazo
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, N.C. 27695-7919
Raoul Schlesser
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, N.C. 27695-7919
Amy Roskowski
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, N.C. 27695-7919
Robert F. Davis
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, N.C. 27695-7919
Z. Sitar
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, N.C. 27695-7919
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Abstract

The energy distribution of electrons that were transported through a thin intrinsic AlN film was directly measured as a function of the applied field. The measurements were realized by extracting the electrons into vacuum through a semitransparent Au contact and measuring their energy using an electron spectrometer. At moderate applied fields (350 kV/cm), the energy distribution followed a Maxwellian model corresponding to an electron temperature of 2700 K and a drift component below the spectrometer resolution. At higher fields, intervalley scattering was evidenced by the presence of a second peak at 0.7 eV. This coincides well with the energy position of the L-M valley in AlN. To the best of our knowledge, these are the first measurements that offer direct evidence of intervalley scattering in any solid system.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 639: Symposium G – GaN and Related Alloys-2000 , 2000 , G11.33
Copyright
Copyright © Materials Research Society 2001

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References

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