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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/9098

Title: Electronic structure of Na(2)CuP(2)O(7): a nearly 2D Heisenberg antiferromagnetic system
Authors: SALUNKE, S
SINGH, VR
MAHAJAN, AV
DASGUPTA, I
Keywords: magnetic-properties
Issue Date: 2009
Publisher: IOP PUBLISHING LTD
Citation: JOURNAL OF PHYSICS-CONDENSED MATTER, 21(2), -
Abstract: We have employed first principles calculations to study the electronic structure and the implications for the magnetic properties of Na(2)CuP(2)O(7). Using the self-consistent tight-binding linearized muffin-tin orbital method and the Nth-order muffin-tin orbital downfolding method, we have calculated the various intrachain and interchain hopping parameters between the magnetic Cu(2+) ions. Our calculations for Na(2)CuP(2)O(7) reveal dominant intrachain hopping, but in contrast to the typical quantum spin chains the interchain hoppings are not negligible. The Wannier function plot of the Cu d(x2-y2) orbitals shows that the exchange interactions are primarily mediated by the oxygens and the distance between the oxygens in Na(2)CuP(2)O(7) is favorable for both intrachain and interchain interactions, suggesting the inapplicability of the one-dimensional Heisenberg model for this system, in agreement with recent experimental results.
URI: http://dx.doi.org/10.1088/0953-8984/21/2/025603
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9098
http://hdl.handle.net/10054/9098
ISSN: 0953-8984
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