Superconductivity in the Z 2 kagome metal KV 3 Sb 5
Brenden R. Ortiz,P. M. Sarte,Eric Kenney,Michael Graf,Samuel M. L. Teicher,Ram Seshadri,Stephen D. Wilson +6 more
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In this paper, the authors reported the observation of bulk superconductivity in single crystals of the two-dimensional kagome metal (KV, Rb, Cs) with magnetic susceptibility, resistivity, and heat capacity measurements.Abstract:
Here we report the observation of bulk superconductivity in single crystals of the two-dimensional kagome metal ${\mathrm{KV}}_{3}{\mathrm{Sb}}_{5}$. Magnetic susceptibility, resistivity, and heat capacity measurements reveal superconductivity below ${T}_{c}=0.93\phantom{\rule{0.28em}{0ex}}\mathrm{K}$, and density functional theory (DFT) calculations further characterize the normal state as a ${\mathbb{Z}}_{2}$ topological metal. Our results demonstrate that the recent observation of superconductivity within the related kagome metal ${\mathrm{CsV}}_{3}{\mathrm{Sb}}_{5}$ is likely a common feature across the $A{\mathrm{V}}_{3}{\mathrm{Sb}}_{5}$ ($A$: K, Rb, Cs) family of compounds and establishes them as a rich arena for studying the interplay between bulk superconductivity, topological surface states, and likely electronic density wave order in an exfoliable kagome lattice.read more
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Electronic nature of charge density wave and electron-phonon coupling in kagome superconductor KV3Sb5
TL;DR: In this paper , the electronic nature of the charge density wave (CDW) phase in high-resolution angle-resolved photoemission measurements on KV3Sb5 superconductors was revealed.
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Twofold symmetry of c-axis resistivity in topological kagome superconductor CsV3Sb5 with in-plane rotating magnetic field.
TL;DR: In this article, the anisotropic in-plane electronic state and superconductivity in a recently discovered kagome metal CsV3Sb5 by measuring c-axis resistivity with the inplane rotation of magnetic field were investigated.
Journal ArticleDOI
Charge order and superconductivity in kagome materials
TL;DR: In this article, the superconductivity and ordered states formed by interactions have been observed in a family of kagome materials with vanadium atoms, and the open problems for this field are discussed.
Journal ArticleDOI
Multiple energy scales and anisotropic energy gap in the charge-density-wave phase of the kagome superconductor CsV3Sb5
Kosuke Nakayama,Kosuke Nakayama,Yongkai Li,Takemi Kato,Min Liu,Zhiwei Wang,Takashi Takahashi,Yugui Yao,Takafumi Sato +8 more
TL;DR: In this paper, the authors investigated low-energy excitations of kagome metals by angle-resolved photoemission spectroscopy and found an energy gap of 50-70 meV at the Dirac-crossing points of linearly dispersive bands, pointing to an importance of spin-orbit coupling.
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Nodal superconductivity and superconducting domes in the topological Kagome metal CsV3Sb5
Shiyan Li,ChengCheng Zhao,Linshu Wang,Wei Xia,Qiangwei Yin,J. M. Ni,Y. Y. Huang,Chengpeng Tu,Zicheng Tao,Zhijun Tu,Chunsheng Gong,Hechang Lei,Yanfeng Guo,Xiaofan Yang +13 more
TL;DR: In this article, the authors reported the ultralow-temperature thermal conductivity and high pressure resistance measurements on CsV3Sb5 with Tc = 2.5 K, the highest among AV3sb5.
References
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