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

scimago Q4

SJR: 0.189

CiteScore: 1.7

Impact factor: 0.9

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

PB - Pleiades Publishing

SP - 905-908

IS - 6

VL - 41

SN - 1063-7834

SN - 1090-6460

SN - 1726-7498

ER -

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@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}

}

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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

scimago Q4

SJR

0.189

CiteScore

1.7

Impact factor

0.9

ISSN

10637834 (Print)

10906460 (Electronic)

17267498 (Print)