Anharmonic theory of superconductivity in the high-pressure materials
Entidad
UAM. Departamento de Física TeóricaEditor
American Physical SocietyFecha de edición
2021-03-29Cita
10.1103/PhysRevB.103.094519
Physical Review B 103.9 (2021): 094519
ISSN
1098-0121 (print); 1550-235X (online)DOI
10.1103/PhysRevB.103.094519Proyecto
Gobierno de España. SEV-2012-0249Versión del editor
https://doi.org/10.1103/PhysRevB.103.094519Materias
Anharmonicities; Applied Pressure; Effect of Pressure; Function of Pressure; Optical Phonon Energies; Optical Phonons; Room-Temperature Superconductors; FísicaDerechos
© 2021 American Physical SocietyResumen
Electron-phonon superconductors at high pressures have displayed the highest values of critical superconducting temperature Tc on record, now rapidly approaching room temperature. Despite the importance of high-P superconductivity in the quest for room-temperature superconductors, a mechanistic understanding of the effect of pressure and its complex interplay with phonon anharmonicity and superconductivity is missing, as numerical simulations can bring only system-specific details, clouding out key players controlling the physics. Here we develop a minimal model of electron-phonon superconductivity under an applied pressure which takes into account the anharmonic decoherence of the optical phonons. We find that Tc behaves nonmonotonically as a function of the ratio Γ/ω0, where Γ is the optical phonon damping and ω0 is the optical phonon energy at zero pressure and momentum. Optimal pairing occurs for a critical ratio Γ/ω0 when the phonons are on the verge of decoherence ("diffusonlike"limit). Our framework gives insights into recent experimental observations of Tc as a function of pressure in the complex BCS material TlInTe2
Lista de ficheros
Google Scholar:Setty, Chandan
-
Baggioli, Matteo
-
Zaccone, Alessio
Lista de colecciones del ítem
Registros relacionados
Mostrando ítems relacionados por título, autor, creador y materia.
-
Effective theory of superconductivity in strongly coupled amorphous materials
Baggioli, Matteo; Setty, Chandan; Zaccone, Alessio
2020-06-03 -
Anharmonic phonon damping enhances the Tc of BCS-type superconductors
Setty, Chandan; Baggioli, Matteo; Zaccone, Alessio
2020-11-19 -
Universal L−3 finite-size effects in the viscoelasticity of amorphous systems
Phillips, Anthony E.; Baggioli, Matteo; Sirk, Timothy W.; Trachenko, Kostya; Zaccone, Alessio
2021-03-05