Extremely Narrow Superconducting Band with Crystal Spin <inline-formula><math display="inline"><semantics><mfrac bevelled="false"><mi mathvariant="bold">3</mi><mi mathvariant="bold">2</mi></mfrac></semantics></math></inline-formula><i>ℏ</i> in LaH₁₀

Abstract

We show that the high-temperature superconductor LaH10 possesses an unusual superconducting band in its band structure. We examine this band by group-theoretical methods and report evidence that the special features of the band support the characteristics of the superconducting state in LaH10 at megabar pressures, i.e., the strong electron–phonon coupling and the high superconducting transition temperature.

Keywords

• LaH₁₀
• superconducting band
• superconducting eigenstates
• non-adiabatic Heisenberg model
• group theory