Freezing of spin dynamics in underdoped cuprates

2) ((1) J. Stefan Institute; (2) Faculty of Mathematics; I. Sega (1); Ljubljana; Physics; P. Prelovsek (1; Slovenia; Slovenia); University of Ljubljana

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Freezing of spin dynamics in underdoped cuprates

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arxiv 0902.0546 v1 pith:KAVNRK74 submitted 2009-02-03 cond-mat.str-el

I. Sega (1) , P. Prelovsek (1 , 2) ((1) J. Stefan Institute , Ljubljana , Slovenia , (2) Faculty of mathematics , Physics , University of Ljubljana

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keywords cupratesspindampingdynamicsfunctionscalingunderdopedadopting

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The Mori's memory function approach to spin dynamics in doped antiferromagnetic insulator combined with the assumption of temperature independent static spin correlations and constant collective mode damping leads to w/T scaling in a broad range. The theory involving a nonuniversal scaling parameter is used to analyze recent inelastic neutron scattering results for underdoped cuprates. Adopting modified damping function also the emerging central peak in low-doped cuprates at low temperatures can be explained within the same framework.

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