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 |
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Article number | 034801 |
Journal | Physical Review Materials |
Volume | 5 |
Issue number | 3 |
DOIs | |
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 |
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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 |