Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/11556
Title: Ballistic thermoelectric transport properties of two-dimensional group III-VI monolayers
Authors: Çınar, Mustafa Neşet
Özbal Sargın, Gözde
Sevim, Koray
Özdamar, Burak
Kurt, Gizem
Sevinçli, Haldun
Keywords: Monolayers
Issue Date: 2021
Publisher: American Physical Society
Abstract: Ballistic transport and thermoelectric properties of group III-VI compounds (XY: X = B, Al, Ga, In, Tl; Y = O, S, Se, Te, Po) are investigated based on first-principles calculations and Landauer formalism. This large family is composed of 25 compounds which stands out with their unique electronic band structures. Mexican hat shaped valence band, which exhibits quartic energy-momentum relation gives rise to a sharp peak in the density of states as well as a steplike electronic transmission spectrum near the valence band edge. The intriguing electronic band structure and transport properties motivate us to explore thermoelectric properties of group III-VI monolayers. We find that, in addition to the stepwise transmission at the band edge, flat bands, valley degeneracy, and band degeneracy are the factors that enhance thermoelectric efficiencies. For heavier compounds, better thermoelectric efficiencies are possible for both n-type and p-type carriers.
URI: https://doi.org/10.1103/PhysRevB.103.165422
https://hdl.handle.net/11147/11556
ISSN: 2469-9950
2469-9969
Appears in Collections:Materials Science and Engineering / Malzeme Bilimi ve Mühendisliği
Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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