title: Band-gap tuning and linear magnetoresistance in the silver chalcogenides.
abstract: 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 +/-delta)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.
authors.affiliation: The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA.
authors.forename: M
authors.initials: M
authors.lastname: Lee
authors.forename: T F
authors.initials: TF
authors.lastname: Rosenbaum
authors.forename: M L
authors.initials: ML
authors.lastname: Saboungi
authors.forename: H S
authors.initials: HS
authors.lastname: Schnyders