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

Sun, Y. and Salamon, M. B. and Lee, M. and Rosenbaum, T. F. (2003) Giant magnetothermopower associated with large magnetoresistance in Ag_(2−δ)Te. Applied Physics Letters, 82 (9). pp. 1440-1442. ISSN 0003-6951. doi:10.1063/1.1558896.

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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.

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Alternate Title:Giant magnetothermopower associated with large magnetoresistance in Ag2−δTe
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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Department of Energy (DOE)DE-FG02-99ER45789
Issue or Number:9
Record Number:CaltechAUTHORS:20140707-163029363
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46959
Deposited By: George Porter
Deposited On:08 Jul 2014 21:26
Last Modified:10 Nov 2021 17:32

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