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Published March 3, 2003 | Version Published
Journal Article Open

Giant magnetothermopower associated with large magnetoresistance in Ag_(2−δ)Te

Creators

  • 1. ROR icon University of Illinois Urbana-Champaign
  • 2. ROR icon University of Chicago

Abstract

We have probed the temperature and magnetic-field dependence of the thermopower and resistance of a p-type silverchalcogenide,Ag_(2−δ)Te. The application of a magnetic field causes not only a large magnetoresistance but also a giant magnetothermopower effect. The maximum change of thermopower is as high as 470 μV/K in a 7 T magnetic field. Both the magnetoresistance and the magnetothermopower show a pronounced peak and nearly linear behavior near the sign change of the thermopower. Bandcrossing and quantum confinement due to disorder appear to play key roles in the heightened response to field.

Additional Information

© 2003 American Institute of Physics. (Received 2 December 2002; accepted 13 January 2003) The authors are grateful to Tuson Park for help in the thermopower measurements. The work at University of Illinois was partially supported by NSF Grant No. EIA-0121568. The work at the University of Chicago was supported by US Department of Energy Grant No. DE-FG02-99ER45789.

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Additional details

Additional titles

Alternative title
Giant magnetothermopower associated with large magnetoresistance in Ag2−δTe

Identifiers

Eprint ID
46959
Resolver ID
CaltechAUTHORS:20140707-163029363

Funding

NSF
EIA-0121568
Department of Energy (DOE)
DE-FG02-99ER45789

Dates

Created
2014-07-08
Created from EPrint's datestamp field
Updated
2021-11-10
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Caltech groups
Physics Department