Superconductivity and Normal-State Properties of Kagome Metal RbV3Sb5 Single Crystals

By Q. Yin 殷, Z. Tu 涂, C. Gong 龚, Y. Fu 付, Shaohua 少华 Yan 闫, H. Lei 雷. Chinese Physics Letters, 2021

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We report the discovery of superconductivity and detailed normal-state physical properties of RbV3Sb5 single crystals with V kagome lattice. RbV3Sb5 single crystals show a superconducting transition at T c ∼ 0.92 K. Meanwhile, resistivity, magnetization and heat capacity measurements indicate that it exhibits anomalies of properties at T * ∼ 102–103 K, possibly related to the formation of charge ordering state. When T is lower than T *, the Hall coefficient R H undergoes a drastic change and sign reversal from negative to positive, which can be partially explained by the enhanced mobility of hole-type carriers. In addition, the results of quantum oscillations show that there are some very small Fermi surfaces with low effective mass, consistent with the existence of multiple highly dispersive Dirac band near the Fermi energy level.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/b6e899f8ebd6a4f55e97b4b277a53c801197ff03

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Citations in the corpus

Theory of the charge density wave in AV3Sb5 kagome metals (2021, background): “[14] Qiangwei Yin, Zhijun Tu, Chunsheng Gong, Yang Fu,”
Observation of Unconventional Charge Density Wave without Acoustic Phonon Anomaly in Kagome Superconductors AV3Sb5 ( A=Rb , Cs) (2021, methodology): “999%) using the self-flux method, similar to the growth of RbV3Sb5 [13].”
Three-state nematicity and magneto-optical Kerr effect in the charge density waves in kagome superconductors (2022, background): “The newly discovered kagome metals AV 3 Sb 5 (A=K, Rb, Cs) are recent examples of hosting charge density waves (CDWs) below T CDW ≈ 80-100 K and super-conductivity below T C ≈ 0.9-2.5 K [13–24].”
Electronic nature of chiral charge order in the kagome superconductor CsV3Sb5 (2021, background): “Recently, another layered kagome superconductor AV3Sb5 (A = K, Rb, Cs) was discovered with TC up to 2.5K for A=Cs [13-15], providing new research avenues, particularly for transport and STM studies [13-26].”
Fermi Surface Mapping and the Nature of Charge-Density-Wave Order in the Kagome Superconductor CsV3Sb5 (2021, background): “edu CDW order [18–23] followed by the onset of superconductivity at lower temperatures [20, 21, 24].”