Magnetic penetration depth and $T_c$ in superconducting nickelates

F. Bernardini; V. Olevano; A. Cano

doi:10.1103/PhysRevResearch.2.013219

Magnetic penetration depth and $T_c$ in superconducting nickelates

Superconductivity 2020-03-03 v1 Materials Science Strongly Correlated Electrons

Authors: F. Bernardini , V. Olevano , A. Cano

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Abstract

We compute the nominal magnetic penetration depth of $R$ NiO $_2$ ( $R =$ La, Nd) from first principles calculations and discuss the results in relation to the superconducting $T_c$ . We find a marked discrepancy with the well established phenomenology that correlates these two quantities in cuprates (Uemura plot). We also consider the 2D ultrathin limit and estimate the maximum attainable $T_c$ to be $\sim 180$ K according to the Nelson-Kosterliz universal relation between the superfluid density and the transition temperature.

Keywords

nickelates magnetic penetration depth superconducting tc first-principles calculation uemura plot superfluid density

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@article{arxiv.1910.13269,
  title  = {Magnetic penetration depth and $T_c$ in superconducting nickelates},
  author = {F. Bernardini and V. Olevano and A. Cano},
  journal= {arXiv preprint arXiv:1910.13269},
  year   = {2020}
}

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3 pages, 1 table, 2 figures

Magnetic penetration depth and $T_c$ in superconducting nickelates

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