Isotope effects in high-<i>T</i><sub>c</sub>cuprate superconductors as support for the bipolaron theory of superconductivity
A. S. AlexandrovDepartment of Physics, Loughborough University, Loughborough LE11 3TU, UKGuangyao ZhaoDepartment of Physics and Astronomy, California State University, Los Angeles, CA 90032, USA
2012en
ABI
Abstract
We provide a unified parameter-free explanation of the observed oxygen-isotope effects on the critical temperature, the magnetic-field penetration depth and on the normal-state pseudogap for underdoped cuprate superconductors within the framework of the multi-(bi)polaron theory with strong Coulomb and Fröhlich interactions. We also quantitatively explain the measured critical temperature and the magnitude of the magnetic-field penetration depth. This paper thus represents an important support for the bipolaron theory of high-temperature superconductivity, compatible with many other independent observations.
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Cited by 30 references