Electronic Structure of Novel Cation-Radical Salts in High Magnetic Fields
J. S. Brooks, L. Balicas, K. Storr, B. H. Ward, S. Uji, T. Terashima, C. Terakura, J. A. Schlueter, R. W. Winter, J. Mohtasham, G. L. Gard, G. C. Papavassiliou, M. Tokumoto
Abstract
Two organic conducting materials, where unusual aspects of their composition play important roles, are explored: beta''-(BEDT-TTF)2SF5XSO3 which exhibits superconductivity, or a metal-insulator transition (for X=CH2CF2 or CHF respectively), and tau-(P-S, S -DMEDT-TTF)2 (AuBr2) (AuBr2)y which exhibits a large, hysteretic, negative magnetoresistance. Detailed angular dependent magnetoresistance studies that allow a tomographic view of the electronic structure of these materials with increasing magnetic fields are presented.
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