Effect of pseudogap and van Hove singularity density of state on the isotope effect coefficient of superconductor

Author:

Chanpoom Thaipanya1

Affiliation:

1. Program of Physics, Faculty of Science and Technology, Nakhon Ratchasima Rajabhat University, Thailand

Abstract

This research was to study the isotope effect coefficient of high temperature superconductors taking into account the pseudogap. We used the BCS-like model including the effect of the vHs density of state and pseudogap. The isotope effect coefficient was derived to the analytical and the approximation form. For the effect of vHs density of state, we found that the isotope effect coefficient increased as the critical temperature increased. For the pseudogap effect, as the critical temperature increased, the isotope effect coefficient decreased to the BCS value, 0.5. For the effect of the vHs density of state and pseudogap, we found that when the critical temperature increased, the isotope effect coefficient decreased. Finally, we showed our numerical results that can fit well with the experimental data of YBa[Formula: see text]La[Formula: see text]Cu3O[Formula: see text] and Y[Formula: see text]Pr[Formula: see text]Ba2Cu3O[Formula: see text] superconductors.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Influence of pseudo-gap and interlayer coupling on isotope effect in bilayer cuprate superconductors;Physica C: Superconductivity and its Applications;2021-08

2. The dependence of the critical temperature on pressure;International Journal of Modern Physics B;2020-10-27

3. The investigation on anomalous isotope effect coefficient of LaSrCuO superconductor;International Journal of Modern Physics B;2019-12-20

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