# Effect of Coulomb repulsion on the London penetration depth in cuprate superconductors

Source: [Effect of Coulomb repulsion on the London penetration depth in cuprate superconductors](<https://www.sota2.com/research/paper/68fa3bbb1e209131ce8d516a>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T00:45:55.387Z

Authors: K K Komarov, D M Dzebisashvili

Published: 2019-12-10T08:46:11.000Z

## Abstract

We study the effect of Coulomb repulsion between oxygen holes on the London penetration depth $\\lambda$ based on the concept of spin-polaron nature of Fermi quasiparticles in cuprates superconductors. It is shown that for the generally accepted values of the parameters of the spin-fermion model, taking into account the Coulomb interaction, both the one-site Hubbard $U\_p$ and interaction between the holes on next-nearest-neighbor oxygen ions $V\_2$, allows one to achieve a much better agreement of the calculated temperature dependencies of the value $\\lambda^{-2}$ with the experimental data in La$\_{2-x}$Sr$\_{x}$CuO$\_4$ in a wide range around optimal doping.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1912.04577>)

[PDF](<https://arxiv.org/pdf/1912.04577.pdf>)