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arXiv · 1702.06321

Strongly enhanced temperature dependence of the chemical potential in FeSe

L. C. Rhodes·M. D. Watson·A. A. Haghighirad·M. Eschrig·T. K. Kim
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Abstract

Employing a 10-orbital tight binding model, we present a new set of hopping parameters fitted directly to our latest high resolution angle-resolved photoemission spectroscopy (ARPES) data for the high temperature tetragonal phase of FeSe. Using these parameters we predict a large 10 meV shift of the chemical potential as a function of temperature. In order to confirm this large temperature dependence, we performed ARPES experiments on FeSe and observed a $\sim$25 meV rigid shift to the chemical potential between 100 K and 300 K. This unexpectedly strong shift has important implications for theoretical models of superconductivity and of nematic order in FeSe materials.

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L. C. Rhodes, M. D. Watson, A. A. Haghighirad, M. Eschrig, T. K. Kim. 2017-02-21. Strongly enhanced temperature dependence of the chemical potential in FeSe. https://doi.org/10.1103/physrevb.95.195111

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