Sublattice modulated superconductivity in the Kagome Hubbard model

Abstract

We identify a superconducting order featuring spatial pair modulations on the kagome lattice subject to onsite Hubbard U and nearest neighbor V interactions. Within our functional renormalization group analysis, this state appears with a concomitant d-wave superconducting (SC) instability at zero lattice momentum, where it distinguishes itself through intra-unit cell modulations of the pairing function thus breaking the discrete space group symmetry. The relative weight of the sublattice modulated superconductor (SMS) and d-wave SC is influenced by the absolute interaction strength and coupling ratio V /U . Parametrically adjacent to this domain at weak coupling, we find an intra-unit cell modulated vestigial charge density wave and an s-wave SC instability. Our study provides a microscopic setting and thorough description of this novel SMS arising within a translation symmetry broken background.

6 pages, 5 figures

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Cited by in corpus (13)

• Chiral kagome superconductivity modulations with residual Fermi arcs in KV3Sb5 and CsV3Sb5
• The kagome Hubbard model from a functional renormalization group perspective
• Kagome metals
• Observation of Fermi-surface-dependent anisotropic Cooper pairing in kagome superconductor CsV3Sb5
• Higher-Order Van Hove Singularities in Kagome Topological Bands
• Interplay of superconductivity and charge-density-wave order in kagome materials
• Loop Current Order on the Kagome Lattice
• Vestigial $d$-wave charge-$4e$ Superconductivity from Bidirectional Pair Density Waves
• Switchable chiral 2x2 pair density wave in pure CsV3Sb5
• Phase-sensitive evidence for pair density waves in a kagome superconductor
• Fault-tolerant quantum simulation of generalized Hubbard models
• Spin-triplet pair density wave superconductors
• Emblems of pair density waves: dual identity of topological defects and their transport signatures