Isotope effect on the superfluid density in conventional and high-temperature superconductors

Serbyn M, Lee P. 2011. Isotope effect on the superfluid density in conventional and high-temperature superconductors. Physical Review B - Condensed Matter and Materials Physics. 83(2).


Journal Article | Published
Author
Abstract
We investigate the isotope effect on the London penetration depth of a superconductor which measures n S/m*, the ratio of superfluid density to effective mass. We use a simplified model of electrons weakly coupled to a single phonon frequency ω E, but assume that the energy gap Δ does not have any isotope effect. Nevertheless, we find an isotope effect for n S/m* which is significant if Δ is sufficiently large that it becomes comparable to ω E, a regime of interest to high-T c cuprate superconductors and possibly other families of unconventional superconductors with relatively high T c. Our model is too simple to describe the cuprates and it gives the wrong sign of the isotope effect when compared with experiment, but it is a proof of principle that the isotope effect exists for n S/m* in materials where the pairing gap and T c are not of phonon origin and have no isotope effect.
Publishing Year
Date Published
2011-01-19
Journal Title
Physical Review B - Condensed Matter and Materials Physics
Volume
83
Issue
2
IST-REx-ID
969

Cite this

Serbyn M, Lee P. Isotope effect on the superfluid density in conventional and high-temperature superconductors. Physical Review B - Condensed Matter and Materials Physics. 2011;83(2). doi:10.1103/PhysRevB.83.024506
Serbyn, M., & Lee, P. (2011). Isotope effect on the superfluid density in conventional and high-temperature superconductors. Physical Review B - Condensed Matter and Materials Physics. American Physical Society. https://doi.org/10.1103/PhysRevB.83.024506
Serbyn, Maksym, and Patrick Lee. “Isotope Effect on the Superfluid Density in Conventional and High-Temperature Superconductors.” Physical Review B - Condensed Matter and Materials Physics. American Physical Society, 2011. https://doi.org/10.1103/PhysRevB.83.024506.
M. Serbyn and P. Lee, “Isotope effect on the superfluid density in conventional and high-temperature superconductors,” Physical Review B - Condensed Matter and Materials Physics, vol. 83, no. 2. American Physical Society, 2011.
Serbyn M, Lee P. 2011. Isotope effect on the superfluid density in conventional and high-temperature superconductors. Physical Review B - Condensed Matter and Materials Physics. 83(2).
Serbyn, Maksym, and Patrick Lee. “Isotope Effect on the Superfluid Density in Conventional and High-Temperature Superconductors.” Physical Review B - Condensed Matter and Materials Physics, vol. 83, no. 2, American Physical Society, 2011, doi:10.1103/PhysRevB.83.024506.
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