%0 Journal Article %1 PhysRevLett.127.177001 %A Wu, Xianxin %A Schwemmer, Tilman %A Müller, Tobias %A Consiglio, Armando %A Sangiovanni, Giorgio %A Di Sante, Domenico %A Iqbal, Yasir %A Hanke, Werner %A Schnyder, Andreas P %A Denner, M Michael %A Fischer, Mark H %A Neupert, Titus %A Thomale, Ronny %D 2021 %I American Physical Society %J Phys. Rev. Lett. %K a %N 17 %P 177001 %R 10.1103/PhysRevLett.127.177001 %T Nature of unconventional pairing in the kagome puperconductors AV$_3$Sb$_5$ (A = K, Rb, Cs) %U https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.127.177001 %V 127 %X The recent discovery of AV3Sb5 (A = K, Rb, Cs) has uncovered an intriguing arena for exotic Fermi surface instabilities in a kagome metal. Among them, superconductivity is found in the vicinity of multiple van Hove singularities, exhibiting indications of unconventional pairing. We show that the sublattice interference mechanism is central to understanding the formation of superconductivity in a kagome metal. Starting from an appropriately chosen minimal tight-binding model with multiple van Hove singularities close to the Fermi level for AV3Sb5, we provide a random phase approximation analysis of superconducting instabilities. Nonlocal Coulomb repulsion, the sublattice profile of the van Hove bands, and the interaction strength turn out to be the crucial parameters to determine the preferred pairing symmetry. Implications for potentially topological surface states are discussed, along with a proposal for additional measurements to pin down the nature of superconductivity in AV3Sb5.

@article{PhysRevLett.127.177001, abstract = {The recent discovery of AV3Sb5 (A = K, Rb, Cs) has uncovered an intriguing arena for exotic Fermi surface instabilities in a kagome metal. Among them, superconductivity is found in the vicinity of multiple van Hove singularities, exhibiting indications of unconventional pairing. We show that the sublattice interference mechanism is central to understanding the formation of superconductivity in a kagome metal. Starting from an appropriately chosen minimal tight-binding model with multiple van Hove singularities close to the Fermi level for AV3Sb5, we provide a random phase approximation analysis of superconducting instabilities. Nonlocal Coulomb repulsion, the sublattice profile of the van Hove bands, and the interaction strength turn out to be the crucial parameters to determine the preferred pairing symmetry. Implications for potentially topological surface states are discussed, along with a proposal for additional measurements to pin down the nature of superconductivity in AV3Sb5.}, added-at = {2023-03-17T15:10:46.000+0100}, author = {Wu, Xianxin and Schwemmer, Tilman and Müller, Tobias and Consiglio, Armando and Sangiovanni, Giorgio and Di Sante, Domenico and Iqbal, Yasir and Hanke, Werner and Schnyder, Andreas P and Denner, M Michael and Fischer, Mark H and Neupert, Titus and Thomale, Ronny}, biburl = {https://www.bibsonomy.org/bibtex/2dca2a6a87d18938d6288f910306d1464/ctqmat}, day = 19, description = {Nature of Unconventional Pairing in the Kagome Superconductors AV3Sb5 (A = K, Rb, Cs)}, doi = {10.1103/PhysRevLett.127.177001}, interhash = {4e8f677550ef239d5690b8f8e55e5fad}, intrahash = {dca2a6a87d18938d6288f910306d1464}, journal = {Phys. Rev. Lett.}, keywords = {a}, month = {11}, number = 17, numpages = {7}, pages = 177001, publisher = {American Physical Society}, timestamp = {2023-10-19T10:43:42.000+0200}, title = {Nature of unconventional pairing in the kagome puperconductors AV$_{\mathbf{3}}$Sb$_{\mathbf{5}}$ (A = K, Rb, Cs)}, url = {https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.127.177001}, volume = 127, year = 2021 }