Abstract
The family of AV3Sb5 (A = K, Rb, Cs) kagome metals exhibits charge density wave (CDW) order, proposed to be chiral, followed by a lower temperature superconducting state. Recent studies have proposed the importance of band structure saddle points proximal to the Fermi energy in governing these two transitions. Here we show the effects of hole doping achieved via chemical substitution of Sn for Sb on the CDW and superconducting states in both KV3Sb5 and RbV3Sb5 and generate a phase diagram. Hole doping lifts the Γ pocket and van Hove singularities toward EF causing the superconducting TC in both systems to increase to about 4.5 K, while rapidly suppressing the CDW state.
| Original language | English |
|---|---|
| Article number | 074802 |
| Journal | Physical Review Materials |
| Volume | 6 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 2022 |
| 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 (Grant No. DMR-1906325). The research reported here made use of shared facilities of the NSF Materials Research Science and Engineering Center at UC Santa Barbara Grant No. DMR-1720256, a member of the Materials Research Facilities Network 31. Use of the Advanced Photon Source at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. Y.M.O. is supported by the National Science Foundation Graduate Research Fellowship Program under Grant No. DGE-1650114. F.K. acknowledges the Roy T. Eddleman Center for Quantum Innovation (ECQI) for their support.