Interlayer magnetic-frustration-driven quantum spin disorder in the honeycomb compound In3Cu2VO9
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AbstractIn this paper we present the electronic and magnetic properties of the honeycomb compound In3Cu2VO9. We find that the band dispersions display Dirac cone features in the nonmagnetic phase, as observed in graphene. The parent phase is a charge transfer insulator with an energy gap of about 1.5 eV. Singly occupied d(3z2-r2) electrons of copper ions contribute an S = 1/2 spin, while vanadium ions show nonmagnetism. The planar nearest-neighbor, next-nearest-neighbor and interplane superexchange couplings of Cu spins are J(1) approximate to 16.2meV, J(2) approximate to 0.3meV and J(z) approximate to 1.2meV, suggesting a low-dimensional antiferromagnet rather than a spin liquid. We propose that the magnetic frustration along the c-axis leads to a quantum spin disorder in In3Cu2VO9, in accordance with recent experiments. Copyright (C) EPLA, 2013
All Author(s) ListLiu DY, Guo Y, Zhang XL, Wang JL, Zeng Z, Lin HQ, Zou LJ
Journal nameEPL
Volume Number103
Issue Number4
PublisherEuropean Physical Society
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesPhysics; Physics, Multidisciplinary; PHYSICS, MULTIDISCIPLINARY

Last updated on 2021-27-02 at 00:18