Electronic specific heat of two-band layered superconductors: Analysis within the generalized two-band alpha modelстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 25 декабря 2013 г.
Аннотация:The generalized two-band alpha model of superconductivity is consistently developed by taking into account the interband electron-phonon interaction. The model is applied to calculate the electronic contribution to the specific heat, superconducting gaps, and electron-phonon coupling constants of the multiband layered superconductors MgB2 and Ba(Fe0.925Co0.075)(2)As-2. For both compounds, the energy gaps and electron-phonon coupling constants are determined, and the temperature behavior of the specific heat is obtained that describes the experimental data well. It is shown that the well-known two-band alpha model that assumes independent bands is formally valid only in the case of relatively strong interband scattering in the band with a smaller gap.