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arXiv · 2307.04903

Negative electrohydrostatic pressure between superconducting bodies

Thomas J. Maldonado·Dung N. Pham·Alessio Amaolo·Alejandro W. Rodriguez·Hakan E. Türeci
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Abstract

By applying a hydrodynamic representation of non-relativistic scalar electrodynamics to the superconducting order parameter, we predict a negative (attractive) pressure between planar superconducting bodies. For conventional superconductors with London penetration depth $\lambda_\text{L} \approx 100 \text{ nm}$, the pressure reaches tens of $\text{N/mm}^2$ at angstrom separations. The resulting surface energies are in better agreement with experimental values than those predicted by the Hartree-Fock theory, and the emergent electric-field screening length is comparable to that of the Thomas-Fermi theory. The model circumvents the bulk limitations of the Bardeen-Cooper-Schrieffer and Ginzburg-Landau theories to the analysis of superconducting quantum devices.

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Thomas J. Maldonado, Dung N. Pham, Alessio Amaolo, Alejandro W. Rodriguez, Hakan E. Türeci. 2023-07-10. Negative electrohydrostatic pressure between superconducting bodies. https://doi.org/10.1103/physrevb.110.014508

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