Driving perpendicular heat flow: (p×n)-type transverse thermoelectrics for microscale and cryogenic peltier cooling

Chuanle Zhou*, S. Birner, Yang Tang, K. Heinselman, M. Grayson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

Whereas thermoelectric performance is normally limited by the figure of merit ZT, transverse thermoelectrics can achieve arbitrarily large temperature differences in a single leg even with inferior ZT by being geometrically tapered. We introduce a band-engineered transverse thermoelectric with p-type Seebeck in one direction and n-type orthogonal, resulting in off-diagonal terms that drive heat flow transverse to electrical current. Such materials are advantageous for microscale devices and cryogenic temperatures - exactly the regimes where standard longitudinal thermoelectrics fail. InAs/GaSb type II superlattices are shown to have the appropriate band structure for use as a transverse thermoelectric.

Original languageEnglish (US)
Article number227701
JournalPhysical review letters
Volume110
Issue number22
DOIs
StatePublished - May 31 2013

ASJC Scopus subject areas

  • General Physics and Astronomy

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