Reference : Effects of topological band structure on thermoelectric transport of bismuthene
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/48534
Effects of topological band structure on thermoelectric transport of bismuthene
English
Gaffar, Muhammad []
Wella, Sasfan Arman []
Hasdeo, Eddwi Hesky mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
8-Nov-2021
Physical Review. B
American Physical Society
104
20
205105
Yes (verified by ORBilu)
International
2469-9950
2469-9969
[en] topology ; thermoelectric ; bismuthene
[en] Two-dimensional bismuth (Bi) layer, known as bismuthene, exhibits Z2 topological bulk states due to large spin-orbit coupling that inverts the bands. Using the tight-binding method, we calculate the band structure of buckled bismuthene to understand its topological and trivial phases. We determine the thermoelectric properties for some considered phases, incorporating the edge states contribution, by using the linearized Boltzmann transport equation with a constant relaxation time approximation. It is shown that the thermoelectric figure of merit, ZT, actually drops in undoped topological bismuthene due to the edge effects. Surprisingly, the topological edge states enhance
ZT at large doping with the Fermi energy near the bottom of bulk bands when bismuthene is nearly metallic.
FNR Core
Researchers ; Professionals ; Students
http://hdl.handle.net/10993/48534
10.1103/PhysRevB.104.205105
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.104.205105

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