Quantum dephasing of kagome superconductivity

TL;DR

This paper investigates quantum dephasing in kagome superconductors, highlighting a potential new mechanism influenced by correlation and topology, with implications for understanding phase fragility and charge order interactions.

Contribution

It proposes a novel quantum dephasing mechanism in kagome superconductivity, connecting correlation effects, topology, and charge order interactions.

Findings

Evidence of fluctuating superconductivity at a magic pressure

Discussion of a new quantum dephasing mechanism

Analysis of phase fragility and charge order effects

Abstract

Recent observations for a pressurized kagome superconductor through transport, muon spin relaxation, nuclear magnetic resonance, and point contact spectroscopy demonstrate striking fluctuating superconductivity at a magic pressure. This discovery may hint at a new quantum dephasing mechanism, which can be discussed from the perspectives of correlation and topology. Three outstanding questions should be considered in decoding this mechanism: one is the intrinsic phase fragile nature of kagome superconductivity; second is the role of Coulomb interactions within different charge-ordered phases; third is the geometrical phase compatibility between superconductivity and different charge orders.