Work

Corrugated flat band as an origin of large thermopower in hole doped PtSb2

Year: 2012

Type: article

Abstract: The origin of the recently discovered large thermopower in hole-doped PtSb2 is theoretically analyzed based on a model constructed from first principles band calculation. It is found that the valence band dispersion has an overall flatness combined with some local ups and downs, which gives small Fermi surfaces scattered over the entire Brillouin zone. The Seebeck coefficient is calculated using this model, which gives good agreement with the experiment. We conclude that the good thermoelectric property originates from this “corrugated flat band”, where the coexistence of large Seebeck coefficient and large electric conductivity is generally expected.

Source: AIP Advances

DOI: 10.1063/1.4759007

Authors: Kouta Mori, Hidetomo Usui, Hirofumi Sakakibara, Kazuhiko Kuroki

Institutions: University of Electro-Communications, Japan Science and Technology Agency

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,350

Funder: Japan Society for the Promotion of Science