Superconductivity in the Z2 kagome metal KV3Sb5

Brenden R. Ortiz; Paul M. Sarte; Eric M. Kenney; Michael J. Graf; Samuel M.L. Teicher; Ram Seshadri; Stephen D. Wilson

doi:10.1103/PhysRevMaterials.5.034801

Superconductivity in the Z2 kagome metal KV3Sb5

Brenden R. Ortiz, Paul M. Sarte, Eric M. Kenney, Michael J. Graf, Samuel M.L. Teicher, Ram Seshadri, Stephen D. Wilson

Research output: Contribution to journal › Article › peer-review

351 Scopus citations

Abstract

Here we report the observation of bulk superconductivity in single crystals of the two-dimensional kagome metal KV3Sb5. Magnetic susceptibility, resistivity, and heat capacity measurements reveal superconductivity below Tc=0.93K, and density functional theory (DFT) calculations further characterize the normal state as a Z2 topological metal. Our results demonstrate that the recent observation of superconductivity within the related kagome metal CsV3Sb5 is likely a common feature across the AV3Sb5 (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.

Original language	English
Article number	034801
Journal	Physical Review Materials
Volume	5
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevMaterials.5.034801
State	Published - Mar 2021
Externally published	Yes

Funding

This work was supported by the National Science Foundation (NSF) through Enabling Quantum Leap: Convergent Accelerated Discovery Foundries for Quantum Materials Science, Engineering and Information (Q-AMASE-i): Quantum Foundry at UC Santa Barbara (DMR-1906325). The research made use of the shared facilities of the NSF Materials Research Science and Engineering Center at UC Santa Barbara (DMR- 1720256). The UC Santa Barbara MRSEC is a member of the Materials Research Facilities Network . B.R.O. and P.M.S. also acknowledge support from the California NanoSystems Institute through the Elings Fellowship program. S.M.L.T has been supported by the National Science Foundation Graduate Research Fellowship Program under Grant No. DGE-1650114.

Funders	Funder number
California NanoSystems Institute	DGE-1650114
Materials Science, Engineering and Information
National Science Foundation
Directorate for Mathematical and Physical Sciences	1720256
University of California, Santa Barbara	DMR-1906325

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10.1103/PhysRevMaterials.5.034801

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title = "Superconductivity in the Z2 kagome metal KV3Sb5",

abstract = "Here we report the observation of bulk superconductivity in single crystals of the two-dimensional kagome metal KV3Sb5. Magnetic susceptibility, resistivity, and heat capacity measurements reveal superconductivity below Tc=0.93K, and density functional theory (DFT) calculations further characterize the normal state as a Z2 topological metal. Our results demonstrate that the recent observation of superconductivity within the related kagome metal CsV3Sb5 is likely a common feature across the AV3Sb5 (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.",

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AU - Ortiz, Brenden R.

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AU - Teicher, Samuel M.L.

AU - Seshadri, Ram

AU - Wilson, Stephen D.

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Superconductivity in the Z2 kagome metal KV3Sb5

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