Effects of Electric Field on Electronic and Optical Properties of SnSe: A First-Principle Study

Electric field (E-field) effects on electric and optical properties of α-, β- and δ-SnSe have been investigated. Under the E-field, a tunable band gap of δ-SnSe appears, ranging from 2.23 to 1.26 eV. The band gap of β-SnSe could be mildly regulated by the E-field, just from 2.32 to 2.01 eV. For α-Sn...

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Bibliographic Details
Published inIntegrated ferroelectrics Vol. 211; no. 1; pp. 167 - 174
Main Authors Luo, Min, Yin, Haihong
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 12.10.2020
Taylor & Francis Ltd
Subjects
DFT calculations
electric field
Electric fields
Energy gap
First principles
optical
Optical properties
SnSe
Tin selenide
tunable gap
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Summary:Electric field (E-field) effects on electric and optical properties of α-, β- and δ-SnSe have been investigated. Under the E-field, a tunable band gap of δ-SnSe appears, ranging from 2.23 to 1.26 eV. The band gap of β-SnSe could be mildly regulated by the E-field, just from 2.32 to 2.01 eV. For α-SnSe, the E-field has little effect on its band gap. We further find that the Sn-p and Se-p states mainly contribute to the variations of the band structures. Moreover, due to the application of the E-field, the absorption strength of α-SnSe in visible light might be enhanced.
ISSN:1058-4587
1607-8489
DOI:10.1080/10584587.2020.1803684