Tuning of the flat band and its impact on superconductivity in Mo₅Si_3-xP_x.

ABSTRACT: The superconductivity in systems containing dispersionless (flat) bands is seemingly paradoxical, as traditional Bardeen-Cooper-Schrieffer theory requires an infinite enhancement of the carrier masses. However, the combination of flat and steep (dispersive) bands within the multiple band scenario might boost superconducting responses, potentially explaining high-temperature superconductivity in cuprates and metal hydrides. Here, we report on the magnetic penetration depths, the upper critical field, and the specific heat measurements, together with the first-principles calculations for the Mo₅Si_3-xP_x superconducting family. The band structure features a flat band that gradually approaches the Fermi level as a function of phosphorus doping x, reaching the Fe

SUBMITTER: Khasanov R 

PROVIDER: S-EPMC10928102 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature