Year: 2006
Type: preprint
Abstract: Isotope effects in a multiband superconductor with a leading interband pairing channel are investigated. A relatively small electron-phonon contribution into the pair-transfer interaction can cause effects of observed magnitude. A multiband model which interpolates the cuprate properties is used for illustrative calculations. Isotope exponents of the transition temperature ($α$), supercarrier density ($α_n$), paired carrier effective mass ($α_m$) and of the penetration depth ($α_λ$) on the doping scale have been obtained. The known opposite trend of $α$ and $T_c$ is reflected. The trends of $α$ and $α_n$ are similar. In contrast with the usual assumption in the interband case $α_λ$ is driven by $α_n$, which overwhelmes $α_m$.
Source: arXiv (Cornell University)
Authors: Kristoffel, N., Rubin, P.
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1629499659