Coexistence of static and dynamic magnetism in the Kitaev spin liquid material
Journal Article
·
· Physical Review B
- Boston College, Chestnut Hill, MA (United States)
- Illinois Inst. of Technology, Chicago, IL (United States)
- Univ. Rennes, Rennes (France)
- Lab. CRISMAT, Caen (France)
- Rutherford Appleton Lab., Didcot (United Kingdom)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland)
- Argonne National Lab. (ANL), Argonne, IL (United States)
Searching for a Kitaev spin liquid phase motivated intense research on the honeycomb iridate materials. However, access to a spin liquid ground state has been hindered by magnetic ordering. Cu2IrO3 is a new honeycomb iridate without thermodynamic signatures of a long-range order. Here, we use muon spin relaxation to uncover the magnetic ground state of Cu2IrO3. We find a two-component depolarization with slow- and fast-relaxation rates corresponding to distinct regions with dynamic and static magnetism coexisting in the material. X-ray absorption spectroscopy and first-principles calculations identify a mixed copper valence as the origin of this behavior. Furthermore, our results suggest that a minority of Cu2+ ions nucleate regions of static magnetism, whereas the majority of Cu+/Ir4+ on the honeycomb lattice give rise to a Kitaev spin liquid.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- Agence Nationale de la recherche (ANR); National Science Foundation (NSF); USDOE; USDOE Office of Science (SC); United Kingdom Science and Technology Facilities Council
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1579924
- Alternate ID(s):
- OSTI ID: 1561397
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 9 Vol. 100; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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