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Title: Spin Hamiltonian of hyper-kagome Na{sub 4}Ir{sub 3}O{sub 8}.

Abstract

We derive the spin Hamiltonian for the quantum spin liquid Na{sub 4}Ir{sub 3}O{sub 8}, and then estimate the direct and superexchange contributions between near neighbor iridium ions using a tight-binding parametrization of the electronic structure. We find a magnitude of the exchange interaction comparable to experiment for a reasonable value of the on-site Coulomb repulsion. For one of the two tight-binding parametrizations we have studied, the direct exchange term, which is isotropic, dominates the total exchange. This provides support for those theories proposed to describe this quantum spin liquid that assume an isotropic Heisenberg model.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
979889
Report Number(s):
ANL/MSD/JA-66336
Journal ID: ISSN 1098-0121; TRN: US1003402
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B
Additional Journal Information:
Journal Volume: 81; Journal Issue: 2010; Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
ENGLISH
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 74 ATOMIC AND MOLECULAR PHYSICS; COULOMB FIELD; ELECTRONIC STRUCTURE; EXCHANGE INTERACTIONS; HAMILTONIANS; HEISENBERG MODEL; IRIDIUM IONS; SPIN

Citation Formats

Micklitz, T, Norman, M R, Materials Science Division, and Freie Univ. Spin Hamiltonian of hyper-kagome Na{sub 4}Ir{sub 3}O{sub 8}.. United States: N. p., 2010. Web. doi:10.1103/PhysRevB.81.174417.
Micklitz, T, Norman, M R, Materials Science Division, & Freie Univ. Spin Hamiltonian of hyper-kagome Na{sub 4}Ir{sub 3}O{sub 8}.. United States. https://doi.org/10.1103/PhysRevB.81.174417
Micklitz, T, Norman, M R, Materials Science Division, and Freie Univ. 2010. "Spin Hamiltonian of hyper-kagome Na{sub 4}Ir{sub 3}O{sub 8}.". United States. https://doi.org/10.1103/PhysRevB.81.174417.
@article{osti_979889,
title = {Spin Hamiltonian of hyper-kagome Na{sub 4}Ir{sub 3}O{sub 8}.},
author = {Micklitz, T and Norman, M R and Materials Science Division and Freie Univ.},
abstractNote = {We derive the spin Hamiltonian for the quantum spin liquid Na{sub 4}Ir{sub 3}O{sub 8}, and then estimate the direct and superexchange contributions between near neighbor iridium ions using a tight-binding parametrization of the electronic structure. We find a magnitude of the exchange interaction comparable to experiment for a reasonable value of the on-site Coulomb repulsion. For one of the two tight-binding parametrizations we have studied, the direct exchange term, which is isotropic, dominates the total exchange. This provides support for those theories proposed to describe this quantum spin liquid that assume an isotropic Heisenberg model.},
doi = {10.1103/PhysRevB.81.174417},
url = {https://www.osti.gov/biblio/979889}, journal = {Phys. Rev. B},
issn = {1098-0121},
number = 2010,
volume = 81,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2010},
month = {Fri Jan 01 00:00:00 EST 2010}
}