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- Title
High-T<sub>c</sub> Hydrides: Interplay of Optical and Acoustic Modes and Comments Regarding the Upper Limit of T<sub>c</sub>.
- Authors
Kresin, Vladimir Z.
- Abstract
The phonon spectrum of many superconducting compounds and, especially, high-Tc hydrides, is broad and rather complicated, because of the presence of high-frequency optical modes. In order to analyze an interplay of optical and acoustic phonon branches, it is convenient to introduce two coupling constants, λopt. and λac., along with characteristic frequencies. The correlation between the value of Tc and this interplay is demonstrated for the family of tantal hydrides (TaH2/TaH4/TaH6). The problem of the upper limit of Tc is discussed. The phenomenon of room temperature superconductivity can be provided by the electron-phonon interaction and is described by the strong coupling theory.
- Subjects
PHONONS; CRITICAL temperature; SUPERCONDUCTIVITY; HIGH pressure chemistry; HYDRIDES
- Publication
Journal of Superconductivity & Novel Magnetism, 2018, Vol 31, Issue 11, p3391
- ISSN
1557-1939
- Publication type
Article
- DOI
10.1007/s10948-018-4839-9