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arXiv · 2011.11883

Phonon-mode specific contributions to room-temperature superconductivity in atomic hydrogen at high pressures

Ashok K. Verma·P. Modak·Fabian Schrodi·Alex Aperis·Peter M. Oppeneer
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Abstract

We investigate the role of specific phonon mode symmetries for the room temperature superconductivity in atomic hydrogen under large pressure. Using anisotropic Migdal-Eliashberg theory with ab initio input from density functional theory, we show that the $E_u$ phonon modes are the dominant driving force for obtaining such high critical temperatures. When going from 400 to 600 GPa, we find an increased transition temperature, however, the total electron-phonon coupling strength is counterintuitively reduced. Our analysis reveals that this is due to an enhanced contribution to the coupling strength by the $E_u$ phonon mode.

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Ashok K. Verma, P. Modak, Fabian Schrodi, Alex Aperis, Peter M. Oppeneer. 2020-11-24. Phonon-mode specific contributions to room-temperature superconductivity in atomic hydrogen at high pressures. https://doi.org/10.1103/physrevb.103.094505

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