Correlation between optical phonon softening and superconducting in YBa 2 Cu 3 O x within d-wave Eliashberg theory
Articolo
Data di Pubblicazione:
2024
Citazione:
Correlation between optical phonon softening and superconducting in YBa 2 Cu 3 O x within d-wave Eliashberg theory / C. Jiang, G. Alberto Ummarino, M. Baggioli, E. Liarokapis, A. Zaccone. - In: JPHYS MATERIALS. - ISSN 2515-7639. - 7:4(2024), pp. 045002.1-045002.12. [10.1088/2515-7639/ad6c7f]
Abstract:
We provide a mathematical description, based on d-wave Eliashberg theory, of the strong
correlation between the experimentally observed softening of Raman modes associated with
in-plane oxygen motions and the corresponding superconducting critical temperature Tc, as a
function of oxygen doping x, in YBa2Cu3Ox. The theoretical model provides a direct link between
physical trends of soft optical Ag (in-plane) oxygen modes, the level of oxygen doping x, and the
superconducting Tc. Different regimes observed in the trend of Tc vs doping can be related to
corresponding regimes of optical phonon softening in the Raman spectra. These results provide
further evidence related to the physical origin of high-temperature superconductivity in rare-earth
cuprate oxides and to the significant role of electron–phonon coupling therein.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
charge density waves; cuprates; high-T superconductivity; oxygen doping; phonon softening; Raman spectroscopy; superconductors
Elenco autori:
C. Jiang, G. Alberto Ummarino, M. Baggioli, E. Liarokapis, A. Zaccone
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