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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Nontrivial Fermi surface topology of the kagome superconductor CsV3Sb5 probed by de Haas–van Alphen oscillations
Kiran Lall Shrestha,Ramakanta Chapai,Bal K. Pokharel,D. Miertschin,T. L. Hoai Nguyen,X. Zhou,Duck Young Chung,Mercouri G. Kanatzidis,John F. Mitchell,Ulrich Welp,Dragan Popovic,David Graf,B. Lorenz,W. K. Kwok +13 more
TL;DR: In this article , the normal state Fermi-surface properties of the kagome superconductor were investigated using torque magnetometry with applied fields up to 35 T. The torque signal shows clear de Haas-van Alphen (dHvA) oscillations above 15 T.
Journal ArticleDOI
Microscopic evidence for anisotropic multigap superconductivity in the CsV3Sb5 kagome superconductor
Ritu Gupta,Debarchan Das,C. Mielke III,Zurab Guguchia,Toni Shiroka,C. Baines,Marek Bartkowiak,Hubertus Luetkens,Rustem Khasanov,Qiangwei Yin,Zhijun Tu,Chunsheng Gong,Hechang Lei +12 more
TL;DR: In this article , anisotropic superconducting properties of kagome superconductor CsV$_3$Sb$_5$ ($T_c \simeq 2.5$ K) were investigated by means of transverse-field muon spin rotation experiments.
Journal ArticleDOI
Mechanism of exotic density-wave and beyond-Migdal unconventional superconductivity in kagome metal AV<sub>3</sub>Sb<sub>5</sub>(A = K, Rb, Cs)
TL;DR: In this article , the bond order in frustrated kagome metal AV3Sb5 and its interplay with exotic superconductivity attract increasing attention, and it is shown that moderate bond-order fluctuations mediate sizable pairing glue, which gives rise to both singlet s-wave and triplet p-wave superconductivities.
Posted Content
Higher-order topological superconductivity from repulsive interactions in kagome and honeycomb systems
TL;DR: In this paper, a pairing mechanism in interacting two-dimensional multipartite lattices was discussed, which intrinsically leads to a second order topological superconducting state with a spatially modulated gap.
Posted Content
Role of Sb in the superconducting kagome metal CsV$_3$Sb$_5$ revealed by its anisotropic compression
Alexander A. Tsirlin,Pierre Fertey,Brenden R. Ortiz,Berina Klis,Valentino Merkl,Martin Dressel,Stephen D. Wilson,Ece Uykur +7 more
TL;DR: In this paper, the authors studied the superconducting kagome metal CsV$_3$Sb$_5$ with single-crystal x-ray diffraction and density-functional band-structure calculations.
References
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Georg Kresse,Daniel P. Joubert +1 more
TL;DR: In this paper, the formal relationship between US Vanderbilt-type pseudopotentials and Blochl's projector augmented wave (PAW) method is derived and the Hamilton operator, the forces, and the stress tensor are derived for this modified PAW functional.
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Georg Kresse,Jürgen Furthmüller +1 more
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