Strongly enhanced temperature dependence of the chemical potential in FeSe

Luke Rhodes, Matthew Watson, A. A. Haghighirad, Matthias Eschrig, Timur 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 ∼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.
Original languageEnglish
Article number195111
Pages (from-to)1-7
Number of pages7
JournalPhysical Review B
Volume95
Issue number19
DOIs
Publication statusPublished - 8 May 2017

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