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arXiv · 2305.13357

Enhancement of Superconductivity in a Dirty Marginal Fermi Liquid

Tsz Chun Wu·Patrick A. Lee·Matthew S. Foster
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Abstract

We study superconductivity in a two-dimensional, disordered marginal Fermi liquid. At the semiclassical level, the transition temperature $T_c$ is strongly suppressed because marginal Fermi liquid effects destroy well-defined quasiparticles. However, we show that interference between quantum-critical collective modes must be included, and these enhance $T_c$, violating Anderson's theorem. Our results suggest that phase coherence in a disordered, quantum-critical system can survive and manifest in the form of collective excitations, despite the absence of coherent quasiparticles.

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Tsz Chun Wu, Patrick A. Lee, Matthew S. Foster. 2023-05-22. Enhancement of Superconductivity in a Dirty Marginal Fermi Liquid. https://doi.org/10.1103/physrevb.108.214506

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