Observation of Quantum Oscillations in the Low Temperature Specific Heat of SmB<sub>6</sub>
ORAL
Abstract
We report measurements of the low-temperature specific heat of Al-flux-grown samples of SmB6 in magnetic fields up to 32T. Quantum oscillations periodic in 1/H are observed between 8 and 32 T at selected angles between [001] and [111]. The observed frequencies and their angular dependence are consistent with previous magnetic torque measurements of SmB6 but the effective masses (inferred from Lifshitz-Kosevich theory) are significantly larger than those inferred from magnetic torque. The magnetic field dependence of the oscillation amplitude is inconsistent with that expected to arise from aluminum inclusions. Instead, our results suggest a bulk density of states origin for the quantum oscillations.
*A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by the National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida. This work was also supported in part by the U.S. Department of Energy Office of Basic Energy Science, Division of Condensed Matter Physics grant DE-SC0017862.
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Presenters
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Nathanael A Fortune
- Smith College