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  • Letter
  • Open Access

Strong enhancements to superconducting properties of one-dimensional systems from metallic reservoirs

J. E. Ebot1,*, Sam Mardazad1, Lorenzo Pizzino2, Johannes S. Hofmann3,4, Thierry Giamarchi2, and Adrian Kantian1,†

  • *Contact author: je2011@hw.ac.uk
  • †Contact author: a.kantian@hw.ac.uk
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Phys. Rev. B 113, L140501 – Published 7 April, 2026

DOI: https://doi.org/10.1103/1szk-xwh1

Abstract

Using an asymmetric two-leg ladder comprising pairing and metallic chains, this Letter proves the striking power of reservoir-mediated boosting of superconductivity. Using many-body numerics on large systems at zero and finite temperature, we unravel the processes by which the metal parameters can impact the effective pairing strength and the ranged pair-pair coupling mediated by the metal. These then enhance key superconducting properties far above those of the isolated system. Thus, our Letter identifies a general mechanism by which reservoirs can strongly suppress the effects of the Mermin-Wagner theorem in finite-sized systems, allowing even large one-dimensional systems to appear practically ordered.

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Phys. Rev. B 113, L140501– Published 7 April, 2026
  • Received 28 July 2025
  • Revised 1 March 2026
  • Accepted 9 March 2026
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