Strong particle-hole asymmetry in a 200 Kelvin superconductor

Soham S. Ghosh, Yundi Quan, and Warren E. Pickett
Phys. Rev. B 100, 094521 – Published 16 September 2019
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Abstract

The superconducting state of metals has long provided a classic example of particle-hole symmetry at low energy. Fermionic self-energy results based on first-principles theory for the electron-phonon coupling in H3S presented here illustrate strong particle-hole asymmetry in the dynamics arising from the underlying sharp structure in the fermionic density of states. Thus H3S not only is the superconductor with the highest critical temperature Tc (through 2018), but its low-energy, low-temperature properties deviate strongly from textbook behavior. The minor momentum and band dependence of the fermionic self-energy allows evaluation of the momentum-resolved and zone-averaged spectral densities and interacting thermal distribution function, all of which clearly illustrate strong particle-hole asymmetry.

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  • Received 23 May 2019
  • Revised 7 August 2019

DOI:https://doi.org/10.1103/PhysRevB.100.094521

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Soham S. Ghosh, Yundi Quan, and Warren E. Pickett*

  • Department of Physics, University of California, Davis, California 95616, USA

  • *wepickett@vcdavic.edu

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Issue

Vol. 100, Iss. 9 — 1 September 2019

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