Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session T60: Poster Session III
Thursday, March 8, 2018
LACC Room: West Hall A
Abstract: T60.00091 : Effect of Rattling Phonon on Superconductivity of KOs2O6
We model the electron coupling to anharmonic (rattling) mode in β-pyrochlore superconductor KOs2O6 by a sharply peaked electron-phonon coupling function centered at the mode energy. The strong-coupling Eliashberg equations are solved for the transition temperature and the gap function for a series of temperatures below Tc. From these solutions we obtain the temperature dependence of the gap edge, the nuclear magnetic resonance (NMR) relaxation rate and the microwave conductivity for several values of the electron-phonon coupling
parameter. The result are compared with the available experimental results.
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