Isotope Effect in Rattling-Induced Superconductor

Details Isotope Effect in Rattling-Induced Superconductor Isotope Effect in Rattling-Induced Superconductor

2011-07-08

arxiv.org/abs/1107.1565v2

Physics

Condensed Matter

Superconductivity

2 pages, 2 figures. Submitted to J. Phys. Soc. Jpn

Scientific paper

In order to clarify that the Cooper pair in $\beta$-pyrochlore oxides is mediated by anharmonic oscillation of guest atom, i.e., {\it rattling}, we propose an experiment to detect anomalous isotope effect. In the formula of $T_{\rm c} \propto M^{-\eta}$, where $T_{\rm c}$ is superconducting transition temperature and $M$ denotes mass of the oscillator, the exponent $\eta$ is found to increase with the increase of anharmonicity of a potential for the guest atom. We show that $\eta$ is larger than 1/2 in rattling-induced superconductor, in sharp contrast to $\eta=1/2$ for weak-coupling superconductivity due to harmonic phonons and $\eta<1/2$ for strong-coupling superconductivity with the inclusion of the effect of Coulomb repulsion.

Affiliated with

Also associated with

No associations

Rating

Isotope Effect in Rattling-Induced Superconductor does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Isotope Effect in Rattling-Induced Superconductor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isotope Effect in Rattling-Induced Superconductor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-221849