Nontrivial Fermi surface topology and large anomalous Hall effect in the kagome superconductor RbV3Sb5
Yuanyuan Wang, Zheng Chen, Yong Nie, Yong Zhang, Qun Niu, Guolin Zheng, Xiangde Zhu, Wei Ning, Mingliang Tian
DOI 10.1103/PhysRevB.108.035117 · Physical Review B
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Abstract
We report the systematic investigation of the magnetoresistance and Hall resistivity of the kagome superconductor RbV3Sb5 single crystals. The crystals show pronounced quantum oscillations with multifrequency. Analysis of oscillations reveals the existence of three bands that have two-dimensional character and host light effective quasiparticle mass and nontrivial Berry phase. In addition, we observed a giant anomalous Hall conductivity (AHC) that reaches up to 3.3×103Ω−1cm−1 in RbV3Sb5. The temperature dependence of AHC reveals an origin that correlated with the charge-density wave order. The anomalous Hall ratio (∼1%) shows weak temperature dependence below 30 K. These results will shed information on the nature of correlated topological physics in kagome material RbV3Sb5.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| RbV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.05 | Pressure not reported | onset |
| KV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.93 | Pressure not reported | unknown |
| CsV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.5 | Pressure not reported | unknown |
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