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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Rotation symmetry breaking in the normal state of a kagome superconductor KV3Sb5
TL;DR: In this article , the authors used spectroscopic-imaging scanning tunneling microscopy to reveal a pronounced intensity anisotropy between different 2a0 charge density wave (CDW) directions in KV3Sb5.
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Coherent phonon spectroscopy and interlayer modulation of charge density wave order in the kagome metal CsV 3 Sb 5
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Electronic correlations in the normal state of the kagome superconductor KV 3 Sb 5
TL;DR: In this paper, the authors investigated the correlated electronic structure and magnetic properties of the kagome-lattice materials in the normal state and showed that these materials are good metals with weak local correlations.
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Discovery of unconventional chiral charge order in kagome superconductor KV3Sb5.
Yu-Xiao Jiang,Jiaxin Yin,M. Michael Denner,Nana Shumiya,Brenden R. Ortiz,Gang Xu,Zurab Guguchia,Junyi He,Shafayat Hossain,Xiaoxiong Liu,Jacob Ruff,Linus Kautzsch,Songtian S. Zhang,Guoqing Chang,Ilya Belopolski,Qi Zhang,Tyler A. Cochran,Daniel Multer,Maksim Litskevich,Zijia Cheng,Xian P. Yang,Ziqiang Wang,Ronny Thomale,Titus Neupert,Stephen D. Wilson,M. Zahid Hasan +25 more
TL;DR: In this article, the authors used high-resolution scanning tunnelling microscopy (STM) to discover an unconventional charge order in a kagome material KV3Sb5, with both a topological band structure and a superconducting ground state.
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Anisotropic superconducting properties of Kagome metal CsV3Sb5
Shunli Ni,Sheng Ma,Yuhang Zhang,Jie Yuan,Haitao Yang,Zouyouwei Lu,N. L. Wang,Jianping Sun,Zhen Zhao,Dong Li,Shaobo Liu,Hua Zhang,Hui Chen,Kui Jin,Jinguang Cheng,Li Yu,Fang Zhou,Xiaoli Dong,Jiangping Hu,Hong-Jun Gao,Zhongxian Zhao +20 more
TL;DR: In this article, the superconducting and mixed state properties of high-quality CsV3Sb5 single crystals with Tc ~ 35 K were systematically measured and it was found that the upper critical field Hc2(T) exhibits a large anisotropic ratio of Hc 2^(ab)/Hc2^(c) ~ 9 at zero temperature and fitting its temperature dependence requires a minimum two-band effective model.
References
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