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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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|
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