Effective minimal model and unconventional spin-singlet pairing in Kagome superconductor CsV3Sb5

Autor:	Xiao-Cheng Bai, Wen-Feng Wu, Han-Yu Wang, Ya-Min Quan, Xianlong Wang, Zhi Zeng, Liang-Jian Zou
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	Superconductivity (cond-mat.supr-con) Condensed Matter - Strongly Correlated Electrons Strongly Correlated Electrons (cond-mat.str-el) Condensed Matter - Superconductivity FOS: Physical sciences General Physics and Astronomy Condensed Matter::Strongly Correlated Electrons
Popis:	Recently synthesized Kagome compounds AV$_3$Sb$_5$ attract great attention due to the unusual coexistence of the topology, charge density wave and superconductivity. In this {\it Letter}, based on the band structures for CsV$_3$Sb$_5$ in pristine phase, we fit an effective 6-band model for the low-energy processes; utilizing the random phase approximation (RPA) on the effective minimal model, we obtain the momentum-resolved static spin susceptibility attributing the spin-fluctuation pairing mechanism, we find that the superconducting pairing strengths increase with the lift of the Coulomb correlation, and the superconductive pairing symmetry is singlet, the gap functions are antisymmetric with respect to the x-axis and the y-axis in the intermediate to strong Coulomb correlated regime,indicating the unconventional superconductivity in Kagome compounds AV$_3$Sb$_5$. 6 pages, 6 figures
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a3f9556bd801a3b3f03bb965d88d5e2 http://arxiv.org/abs/2201.10088 Zobrazit plný text záznamu