Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 58: Focus Session: Electron-Phonon Interactions II
O 58.4: Vortrag
Mittwoch, 3. April 2019, 16:00–16:15, H15
No superconductivity in iron polyhydrides at high pressures — •Lilia Boeri1, Christoph Heil2, and Giovanni Bachelet1 — 1Dipartimento di Fisica, Sapienza Universita' di Roma, Italy — 2ITP-CP, Graz University of Technology, Austria
A recent experimental study [1] reported the formation of several new iron polyhydrides FeHx at pressures in the megabar range and spotted FeH5, which forms above 130 GPa, as a potential high-Tc superconductor because of an alleged layer of dense metallic hydrogen. Shortly after, two studies based on ab initio Migdal-Eliashberg theory seemed to independently confirm such a conjecture. We conversely find, on the same theoretical-numerical basis, that neither FeH5 nor its precursor, FeH3, shows any conventional superconductivity and explain why this is the case.
[1] C. Pepin et al., Science 357, 382 (2017).