Electronic correlations in uranium hydride UH5under pressure

Alexey O. Shorikov, Sergey L. Skornyakov, Vladimir I. Anisimov, Artem R. Oganov

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We report results of calculations based on density functional theory and dynamical mean-field theory for the electronic structure of uranium hydride UH5 under pressure, a compound of the uranium-based hydride family some members of which have been predicted to be superconducting. The effective electronic mass enhancement m∗/m ∼ 1.4 indicates that the Coulomb correlations have a moderate strength. However, the topology of the Fermi surface changes strongly at the influence of the correlation effects: one hourglass-like pocket running along the Γ-A direction splits into two elliptical pockets centered at the A point. This result shows the possibility of an unconventional pairing mechanism for uranium hydrides in addition to the electron-phonon pairing that was studied in previous investigations.

Original languageEnglish
Article number385602
JournalJournal of Physics Condensed Matter
Volume32
Issue number38
DOIs
Publication statusPublished - 9 Sep 2020

Keywords

  • electron correlation effects
  • high pressure
  • Lifshitz transition
  • Uranium hydrides

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