Work

Giant magnetothermopower associated with large magnetoresistance in Ag2−δTe

Year: 2003

Type: article

Abstract: We have probed the temperature and magnetic-field dependence of the thermopower and resistance of a p-type silver chalcogenide, Ag2−δTe. 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.

Source: Applied Physics Letters

DOI: 10.1063/1.1558896

Authors: Young Sun, M. B. Salamon, M. Lee, T. F. Rosenbaum

Institutions: University of Illinois Urbana-Champaign, University of Chicago

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: National Science Foundation, U.S. Department of Energy, University of Illinois at Urbana-Champaign

Awards: G222768804, COHERENT EXCITATIONS IN DISORDERED QUANTUM MATERIALS, ITR/SY: Foundations of Solid-State Quantum Information Processing, A NEW CLASS OF MAGNETORESISTIVE COMPOUNDS