Charge-2esuperconductivity from a disordered pair density wave

arXiv:2509.20435 · cond-mat.str-el, cond-mat.supr-con · Submitted 2025-09-24 · Read on arXiv

cond-mat.str-el, cond-mat.supr-con

Submitted: 2025-09-24

Updated: 2026-09-15

Comments: 4.5 pages, 1 figure

Journal ref: Phys. Rev. Lett. 137, 116003 - Published 11 September, 2026

License: http://creativecommons.org/licenses/by/4.0/

The gist: We investigate the effects of disorder on a system that in the clean limit is a pair density wave (PDW) superconductor.

Terminology

Frustration — 4× in this paper · explained in 2 episodes
Redundancy — 3× in this paper · explained in 2 episodes
Coherence Length — 2× in this paper · explained in 2 episodes
Effective Hamiltonian — 2× in this paper · explained in 2 episodes
Phase Transitions — 2× in this paper · explained in 2 episodes
Supplemental Material — 2× in this paper
Topological Order — 2× in this paper · explained in 2 episodes
Decoupling — 1× in this paper · explained in 2 episodes
Generalization — 1× in this paper · explained in 13 episodes
Topological Defects — 1× in this paper · explained in 2 episodes

Abstract

We investigate the effects of disorder on a system that in the clean limit is a pair density wave (PDW) superconductor. The charge order of the clean PDW is inevitably lost (via Imry-Ma), but the fate of the superconducting order is less clear. Here, we consider a strongly inhomogeneous limit in which the system consists of a random collection of PDW puddles embedded in a metallic background. When the puddles are dilute, they become phase coherent at low temperatures, resulting in a state that is macroscopically equivalent to a charge-2e s-wave superconductor. This is a mechanism by which a PDW can have zero resistance, even in the presence of disorder, and is thermodynamically distinct from the "vestigial" charge-2e superconductivity that has been proposed to arise in weakly disordered PDWs.

Sources

Order Fractionalization

Terminology

Abstract

Sources

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