Anisotropic Exchange in Spin Chains

Authors: Dmitry Zakharov HansAlbrecht Krug von Nidda Mikhail Eremin Joachim Deisenhofer Rushana Eremina Alois Loidl

Publish Date: 2008

Volume: , Issue: , Pages: 193-238

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Abstract

Quasionedimensional 1D spin systems are highly unconventional materials which exhibit a wide variety of phenomena including spinPeierls transition and charge ordering In this paper we show that electron spin resonance ESR is a very powerful tool to study spin relaxation mechanisms in these systems We review the microscopic theory of superexchange and include a discussion of some recent experimental and theoretical developments concerning ESR in 1D solids Furthermore we evaluate the anisotropy and the temperature dependence of the ESR linewidth in three 1D systems LiCuVO4 CuGeO3 α′NaV2O5 Thus we can determine the type and the magnitude of the anisotropic exchange interactions between spins and investigate the effects of fluctuations of charge and lattice degrees of freedom in the vicinity of phase transitions in these systems

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