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Band-gap tuning and linear magnetoresistance in the silver chalcogenides

Lee, M. and Rosenbaum, T. F. and Saboungi, M.-L. and Schnyders, H. S. (2002) Band-gap tuning and linear magnetoresistance in the silver chalcogenides. Physical Review Letters, 88 (6). Art. No. 066602. ISSN 0031-9007. doi:10.1103/PhysRevLett.88.066602.

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Optimally doped silver selenide and silver telluride exhibit linear positive magnetoresistance over decades in magnetic field and on a scale comparable to the colossal magnetoresistance compounds. We use hydrostatic pressure to smoothly alter the band structure of Ag-rich and Ag-deficient samples of semiconducting Ag_(2±δ)Te of fixed stoichiometry and disorder. We find that the magnetoresistance spikes and the linear field dependence emerges when the bands cross and the Hall coefficient changes sign.

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Additional Information:© 2002 The American Physical Society (Received 25 June 2001; published 24 January 2002) We are grateful to A. A. Abrikosov, A. Husmann, and P. B. Littlewood for illuminating discussions. The work at the University of Chicago was supported by U.S. Department of Energy Grant No. DE-FG02-99ER45789. The work at ANL was supported by the U.S. Department of Energy, Division of Materials Sciences, Office of Basic Energy Sciences, under Contract No. W-31-109-ENG-38.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-99ER45789
Department of Energy (DOE)W-31-109-ENG-38
Issue or Number:6
Classification Code:PACS numbers: 72.20.My, 72.15.Gd, 72.80.Jc
Record Number:CaltechAUTHORS:20140707-163030399
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46964
Deposited By: George Porter
Deposited On:11 Jul 2014 17:10
Last Modified:10 Nov 2021 17:32

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