Negative electrohydrostatic pressure between superconducting bodies

• URL: http://arxiv.org/abs/2307.04903v3
• Date: Tue, 25 Jun 2024 17:38:16 GMT
• Title: Negative electrohydrostatic pressure between superconducting bodies
• Authors: Thomas J. Maldonado, Dung N. Pham, Alessio Amaolo, Alejandro W. Rodriguez, Hakan E. Türeci,
• Abstract summary: We predict a negative (attractive) pressure between planar superconducting bodies. The resulting surface energies are in better agreement than those predicted by the Hartree-Fock theory. The model circumvents the bulk limitations of the Bardeen-Cooper-Schrieffer and Ginzburg-Landau theories.
• Score: 39.58317527488534
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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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