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Tuning charge density wave order and superconductivity in the kagome metals KV3 Sb 5–x Snx and RbV3 Sb 5–x Snx

Journal Article · · Physical Review Materials
 [1];  [1];  [1];  [1];  [1]
  1. Univ. of California, Santa Barbara, CA (United States)
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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. Furthermore, 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.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1982841
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 7 Vol. 6; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
Charge density waves
Kagome lattice
Materials Science
Unconventional superconductors