2010/01/23 by Fedor V. Prigara, Prigara, Fedor V.
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #Superconductivity in MgB2 and Alloys
paper · pdf · doi:10.48550/arxiv.1001.4152
openalex publication_date 2010/01/23 · openalex created_date 2022/10/03 · openalex updated_date 2026/07/28
It is shown that a ferroelastic lattice distortion is associated with the\nsuperconducting transition both in low- and high-temperature superconductors.\nIn layered tetragonal superconductors with a sufficiently high transition\ntemperature, a ferroelastic distortion is improper and is caused by an\nout-of-plane charge ordering. The relation between the out-of-plane charge gap\nand the maximum superconducting transition temperature for these\nsuperconductors is obtained. It is shown also that the specific heat jump at\nthe superconducting transition temperature in pnictide and cuprate\nsuperconductors is produced by ferroelastic fluctuations just below the\ntransition temperature. The amplitude of the corresponding lattice distortion\nis estimated.\n