2023
DOI: 10.1021/acs.nanolett.2c04103
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Nodeless Superconductivity in Kagome Metal CsV3Sb5 with and without Time Reversal Symmetry Breaking

Abstract: The kagome metal CsV3Sb5 features an unusual competition between the charge-density-wave (CDW) order and superconductivity. Evidence for time reversal symmetry breaking (TRSB) inside the CDW phase has been accumulating. Hence, the superconductivity in CsV3Sb5 emerges from a TRSB normal state, potentially resulting in an exotic superconducting state. To reveal the pairing symmetry, we first investigate the effect of nonmagnetic impurity. Our results show that the superconducting critical temperature is insensit… Show more

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Cited by 28 publications
(12 citation statements)
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“…However, both KV 3 Sb 5 and RbV 3 Sb 5 should also be investigated to build an overall picture to understandthis family of V-based kagome superconductors. For instance, a µSR experiment shows that the superconducting energy gap can be tuned from nodal at ambient pressure to nodeless under pressure in RbV 3 Sb 5 and KV 3 Sb 5 [32], but this tunability is absent in CsV 3 Sb 5 , where the gap is found to be nodeless over a large pressure range [37,38]. Whether the observed nodal gap is related to TRSB needs to be addressed.…”
Section: Introductionmentioning
confidence: 99%
“…However, both KV 3 Sb 5 and RbV 3 Sb 5 should also be investigated to build an overall picture to understandthis family of V-based kagome superconductors. For instance, a µSR experiment shows that the superconducting energy gap can be tuned from nodal at ambient pressure to nodeless under pressure in RbV 3 Sb 5 and KV 3 Sb 5 [32], but this tunability is absent in CsV 3 Sb 5 , where the gap is found to be nodeless over a large pressure range [37,38]. Whether the observed nodal gap is related to TRSB needs to be addressed.…”
Section: Introductionmentioning
confidence: 99%
“…1 b, which is the even-parity modulation in the hopping integral (=real) 6 12 . Below the BO transition temperature T BO , superconductivity (SC) with highly anisotropic gap emerges for A = Cs 13 , 14 , and the gap structure changes to isotropic by introducing impurities. Also, nodal to nodeless crossover is induced by the external pressure in A = Rb,K 15 .…”
Section: Introductionmentioning
confidence: 99%
“…46,47 In this work, we investigate Cr 3 Se 4 and Fe 3 S 4 monolayers with kagome structures, which is ignited by the discovery of kagome bulk materials ATM 3 X 5 (A = K, Cs, Rb), which are identified to hold excellent physical properties, such as superconductivity, large anomalous Hall conductivity, and nontrivial topology. [48][49][50] However, most TM 3 X 5 monolayers have been determined to be dynamically unstable. Alternatively, we further eliminated the X atom at the center of hexagons to form…”
Section: Introductionmentioning
confidence: 99%