Physics of the Solid State, volume 41, issue 6, pages 905-908

Applicability of the empirical Varshni relation for the temperature dependence of the width of the band gap

I A Vainshtein ¹

A. F. Zatsepin ¹

V S Kortov ¹

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Urals State Technical University, Ekaterinburg, Russia |

Publication type: Journal Article

Publication date: 1999-06-01

Pleiades Publishing

Journal: Physics of the Solid State

Quartile SCImago

Quartile WOS

Impact factor: 0.6

ISSN: 10637834, 10906460, 17267498

DOI: 10.1134/1.1130901

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Electronic, Optical and Magnetic Materials

Condensed Matter Physics

Abstract

We have carried out a comparison of relations used to describe the temperature dependence of the width of the band gap in crystals. It is shown that for kT≫ℏω the well-known Varshni relation can be obtained from the non-empirical Fan expression in explicit form taking account of the phonon statistics. We have calculated the temperature coefficient bof the width of the band gap for a number of materials in the range where the high-temperature condition is not met. We have found that the Varshni relation overestimates β, whereas calculations based on the Fan expression agree with experiment.

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Vainshtein I. A., Zatsepin A. F., Kortov V. S. Applicability of the empirical Varshni relation for the temperature dependence of the width of the band gap // Physics of the Solid State. 1999. Vol. 41. No. 6. pp. 905-908.

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TY - JOUR

DO - 10.1134/1.1130901

UR - https://doi.org/10.1134/1.1130901

TI - Applicability of the empirical Varshni relation for the temperature dependence of the width of the band gap

T2 - Physics of the Solid State

AU - Vainshtein, I A

AU - Zatsepin, A. F.

AU - Kortov, V S

PY - 1999

DA - 1999/06/01 00:00:00

PB - Pleiades Publishing

SP - 905-908

IS - 6

VL - 41

SN - 1063-7834

SN - 1090-6460

SN - 1726-7498

ER -

BibTex |

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BibTex Copy

@article{1999_Vainshtein,

author = {I A Vainshtein and A. F. Zatsepin and V S Kortov},

title = {Applicability of the empirical Varshni relation for the temperature dependence of the width of the band gap},

journal = {Physics of the Solid State},

year = {1999},

volume = {41},

publisher = {Pleiades Publishing},

month = {jun},

url = {https://doi.org/10.1134/1.1130901},

number = {6},

pages = {905--908},

doi = {10.1134/1.1130901}

}

MLA

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MLA Copy

Vainshtein, I. A., et al. “Applicability of the empirical Varshni relation for the temperature dependence of the width of the band gap.” Physics of the Solid State, vol. 41, no. 6, Jun. 1999, pp. 905-908. https://doi.org/10.1134/1.1130901.

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Publisher

Pleiades Publishing

Journal

Physics of the Solid State

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Quartile WOS

Impact factor

0.6

ISSN

10637834 (Print)
10906460 (Electronic)
17267498 (Print)