Large Magnetoresistance and Fermi Surface Topology of Sn<sub>x</sub>Pb<sub>1-x</sub>Te Single Crystals
ORAL
Abstract
We have investigated the magnetotransport properties of a topological crystalline insulator, SnxPb1-xTe. Resistance shows a large positive magnetoresistance that reaches a value up to 310% at H = 13 T without showing any sign of saturation. At higher fields, both longitudinal and Hall resistance show clear Shubnikov de Haas (SdH) oscillations. There exists a single oscillation frequency, f = 59 T, however, additional frequencies show up at higher tilt angles of applied field with the normal to the sample surface. We have explored the Fermi surface topology by carrying out a detailed angle dependent measurement of quantum oscillations and Berry phase calculations.
*This work is supported in part by the U.S. Air Force Office of Scientific Research Grant FA9550-15-1-0236, the T. L. L. Temple Foundation, the John J. and Rebecca Moores Endowment, and the State of Texas through the Texas Center for Superconductivity at the University of Houston. The research at West Texas A&M University is supported by the start-up grant from the Paul Engler College of Agriculture and Natural Sciences and the Welch Foundation (Grant No. AE-025).
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Presenters
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Duncan Miertschin
- Chemistry and Physics, West Texas A&M University