Tunable Quantum Spin Liquidity in the 1/6th-Filled Breathing Kagome Lattice

We present measurements on a series of materials, Li_{2}In_{1-x}Sc_{x}Mo_{3}O_{8}, that can be described as a 1/6th-filled breathing kagome lattice. Substituting Sc for In generates chemical pressure which alters the breathing parameter nonmonotonically. Muon spin rotation experiments show that this...

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Bibliographic Details
Published in:Physical review letters 2018-06, Vol.120 (22), p.227201-227201
Main Authors: Akbari-Sharbaf, A, Sinclair, R, Verrier, A, Ziat, D, Zhou, H D, Sun, X F, Quilliam, J A
Format: Article
Language:English
Subjects:
Antiferromagnetism
Breathing
Kagome lattice
Liquid phases
Long range order
Magnetic permeability
Muon spin rotation
Organic chemistry
Parameters
Spin liquid
Symmetry
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Summary:We present measurements on a series of materials, Li_{2}In_{1-x}Sc_{x}Mo_{3}O_{8}, that can be described as a 1/6th-filled breathing kagome lattice. Substituting Sc for In generates chemical pressure which alters the breathing parameter nonmonotonically. Muon spin rotation experiments show that this chemical pressure tunes the system from antiferromagnetic long range order to a quantum spin liquid phase. A strong correlation with the breathing parameter implies that it is the dominant parameter controlling the level of magnetic frustration, with increased kagome symmetry generating the quantum spin liquid phase. Magnetic susceptibility measurements suggest that this is related to distinct types of charge order induced by changes in lattice symmetry, in line with the theory of Chen et al. [Phys. Rev. B 93, 245134 (2016)PRBMDO2469-995010.1103/PhysRevB.93.245134]. The specific heat for samples at intermediate Sc concentration, which have the minimum breathing parameter, show consistency with the predicted U(1) quantum spin liquid.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.120.227201