Reference : Thermoelectric properties of Mexican-hat band structures
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
Thermoelectric properties of Mexican-hat band structures
Nurhuda, M []
Nugraha, ART []
Hanna, MY []
Suprayoga, E []
Hasdeo, Eddwi Hesky mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Advances in Natural Sciences: Nanoscience and Nanotechnology
IOP Publishing
Yes (verified by ORBilu)
United Kingdom
[en] Thermoelectrics ; 2D materials ; Flat bands
[en] Materials with Mexican-hat electronic energy dispersions emerging from heterostructures, substrate effects, or spin–orbit couplings are believed to exhibit excellent thermoelectric properties due to its van Hove singularity of density of states in two-dimension. However, within a constant relaxation time approximation, we disprove this belief and we find that the singularity effect is cancelled down by the group velocity contribution in the thermoelectric transport distribution. Nevertheless, the band parameters can still be optimised to reach thermoelectric figure of merit larger than 2 in a wide bandwidth, thus keeping the potential of materials with Mexican-hat bands for thermoelectric applications.

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