2014/07/21 by F. S. Razavi, Fereidoon S Razavi, Razavi, Fereidoon S +14
Computer Science · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Nuclear materials and radiation effects #Seismology and Earthquake Studies #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.1407.5695
14 pages, 9 figures
arxiv created 2014/07/21 · openalex publication_date 2014/07/21 · arxiv updated 2014/07/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The magnitude and the temperature dependence of the superconducting order parameter Δ(T) of single-crystals of Cd2Re2O7 (Tc = 1.02 K) was measured using point contact spectroscopy. In order to fit the conductance spectra and to extract the order parameter at different temperatures we generalized the Blonder-Tinkham-Klapwijk theory by including the self-energy of the quasiparticles into the Bogoliubov equations. This modification enabled excellent fits of the conductance spectra. Δ(T) increases steeply below the superconducting transition temperature of 1.02 K and levels off below about 0.8 K depending on measurement directions where its value varied from 0.22(1) meV to 0.26(1) meV. Our results indicate the presence of a strong electron-phonon interaction and an enhanced quasiparticle damping and may be related to a possible phase transition within the superconducting region at about 0.8 K.