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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Polarity-dependent charge density wave in the kagome superconductor <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>CsV</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Sb</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>
Takemi Kato,Yongkai Li,Kosuke Nakayama,Zhiwei Wang,Seigo Souma,Miho Kitamura,Koji Horiba,Hiroshi Kumigashira,Takashi Takahashi,Takafumi Sato +9 more
TL;DR: In this article , micro-focused angle-resolved photoemission spectroscopy of kagome superconductors was performed to investigate the polar surface and interface properties of materials.
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Effective six-band model and unconventional spin-singlet pairing in Kagome superconductor CsV3Sb5
TL;DR: Based on the band structures for CsV3Sb5 in the pristine phase, Wang et al. as mentioned in this paper construct an effective six-band model for the low-energy processes; utilizing the random phase approximation on the effective sixband model, they show that the E1u (p wave) pairing dominates in the region of 0
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Linear nonsaturating magnetoresistance in kagome superconductor CsV3Sb5 thin flakes
Xinjian Wei,Cong-Kuan Tian,H. Cui,Yongkai Li,Shaobo Liu,Yaqing Feng,Jian Cui,Yuan-Jhe Song,Zhiwei Wang,Jian Hao Chen +9 more
TL;DR: In this paper , the authors reported the observation of linear nonsaturating magnetoresistance (LMR) in layered kagome superconductor and CDW material CsV3Sb5 thin flakes, as well as the dimensional crossover and temperature (T) crossover of such LMR.
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Muon spin relaxation study of the layered kagome superconductor <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>CsV</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Sb</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>
Z. Shan,Pabitra Kumar Biswas,Sudeep Kumar Ghosh,Tolstoy Tula,Adrian D. Hillier,D. T. Adroja,S. Cottrell,Guanghan Cao,Yi Liu,Xiaofeng Xu,Yuntang Song,Huiqiu Yuan,Michael Smidman +12 more
TL;DR: In this article , the muon-spin relaxation/rotation measurements performed on a layered kagome structure with a broad temperature range were performed to uncover the nature of the charge density wave order and superconductivity in this material.
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Magnetic and charge instabilities in vanadium-based topological kagome metals
TL;DR: In this paper , the Fermi-surface instabilities of topological kagome metals were studied and a first principles theory for the current-loop state in this class of materials was provided.
References
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