Dimerization transition of alkali-TCNQ salts: Charge degrees of freedom near the CDW boundary

Kumar, Manoranjan and Ramasesha, S and Pascal, RA and Soos, ZG (2008) Dimerization transition of alkali-TCNQ salts: Charge degrees of freedom near the CDW boundary. In: Europhysics Letters, 83 (3). pp. 37001-1.

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Abstract

Stacks of TCNQ − radical ions in 1 : 1 alkali salts are shown to be near the chargedensity- wave (CDW) boundary, where charge degrees of freedom induce strong dimerization δ.Charge-transfer absorption and δ(V ) are obtained for a one-dimensional (1D) Hubbard model with long-range Coulomb interactions V that ranges from spin-Peierls at V =0 to the CDW boundary at Vc and beyond. Cation dimerization lifts the degeneracy of Peierls systems and confers 3D contributions to the dimerization transition of alkali-TCNQ salts.

Item Type:	Journal Article
Additional Information:	Copyright of this article belongs to EPLA.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	20 Mar 2009 06:28
Last Modified:	19 Sep 2010 04:50
URI:	http://eprints.iisc.ernet.in/id/eprint/15987

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