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- W4308241966 abstract "Motivated by the observation of a pair density wave (PDW) in the kagome metal CsV${}_3$Sb${}_5$, we consider the fate of electrons near a p-type van Hove singularity (vHS) in the presence of local repulsive interactions. We study the effect of such interactions on Fermi surface patches at the vHS. We show how a feature unique to the Kagome lattice known as sublattice interference crucially affects the form of the interactions among the patches. The renormalization group (RG) flow of such interactions results in a regime where the nearest neighbor interaction $V$ exceed the onsite repulsion $U$. We identify this condition as being favorable for the formation of charge-density-wave (CDW) and PDW orders. In the weak coupling limit, we find a complex CDW order as the leading instability, which breaks time reversal symmetry. Beyond RG, we perform a Hartree-Fock study to a $V$-only model and find the pair-density-wave order indeed sets in at some intermediate coupling." @default.
- W4308241966 created "2022-11-09" @default.
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- W4308241966 date "2022-11-02" @default.
- W4308241966 modified "2023-10-17" @default.
- W4308241966 title "Sublattice Interference promotes Pair Density Wave order in Kagome Metals" @default.
- W4308241966 doi "https://doi.org/10.48550/arxiv.2211.01388" @default.
- W4308241966 hasPublicationYear "2022" @default.
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