Shift of the critical temperature in superconductors: a self-consistent approach
Anno: 2020
Autori: Salasnich L., Cappellaro A.
Affiliazione autori: Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, via Marzolo 8, 35131, Padova, Italy; CNR-INO, via Nello Carrara, 1 – 50019, Sesto Fiorentino, Italy
Abstract: Within the Ginzburg-Landau functional framework for the superconducting transition, we analyze the fluctuation-driven shift of the critical temperature. In addition to the order parameter fluctuations, we also take into account the fluctuations of the vector potential above its vacuum. We detail the approximation scheme to include the fluctuating fields contribution, based on the Hartree-Fock-Bogoliubov-Popov framework. We give explicit results for d = 2 and d = 3 spatial dimensions, in terms of easily accessible experimental parameters such as the Ginzburg-Levanyuk number Gi((d)), which is related to the width of the critical region where fluctuations cannot be neglected, and the Ginzburg-Landau parameter kappa, defined as the ratio between the magnetic penetration length and the coherence one.
Giornale/Rivista: SCIENTIFIC REPORTS
Volume: 10 (1) Da Pagina: 9088-1 A: 9088-10
Parole chiavi: Ginzburg-Landau equation; hole superconductivity; transition-temperatue; phase-transitions; density; oxides; gas; thermal fluctuations; critical temperatureDOI: 10.1038/s41598-020-65790-8Citazioni: 1dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-14Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui