%0 Journal Article %1 PhysRevB.108.L081117 %A Wu, Yi-Ming %A Thomale, Ronny %A Raghu, S. %D 2023 %I American Physical Society %J Phys. Rev. B %K a %N 8 %P L081117 %R 10.1103/PhysRevB.108.L081117 %T Sublattice interference promotes pair density wave order in kagome metals %U https://link.aps.org/doi/10.1103/PhysRevB.108.L081117 %V 108 %X Motivated by the observation of a pair density wave (PDW) in the kagome metal CsV3Sb5, we consider the fate of electrons near a p-type Van Hove singularity (vHS) of the kagome lattice with on-site Hubbard U and the nearest-neighbor repulsion V. 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 exceeds the on-site 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.

@article{PhysRevB.108.L081117, abstract = {Motivated by the observation of a pair density wave (PDW) in the kagome metal CsV3Sb5, we consider the fate of electrons near a p-type Van Hove singularity (vHS) of the kagome lattice with on-site Hubbard U and the nearest-neighbor repulsion V. 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 exceeds the on-site 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.}, added-at = {2023-09-08T08:04:19.000+0200}, author = {Wu, Yi-Ming and Thomale, Ronny and Raghu, S.}, biburl = {https://www.bibsonomy.org/bibtex/2fb74841c029036ae3cef2752649923d3/ctqmat}, day = 22, description = {Phys. Rev. B 108, L081117 (2023) - Sublattice interference promotes pair density wave order in kagome metals}, doi = {10.1103/PhysRevB.108.L081117}, interhash = {5126d01e2e020633ecb1e7644005e27a}, intrahash = {fb74841c029036ae3cef2752649923d3}, journal = {Phys. Rev. B}, keywords = {a}, month = {08}, number = 8, numpages = {6}, pages = {L081117}, publisher = {American Physical Society}, timestamp = {2023-10-31T11:13:01.000+0100}, title = {Sublattice interference promotes pair density wave order in kagome metals}, url = {https://link.aps.org/doi/10.1103/PhysRevB.108.L081117}, volume = 108, year = 2023 }