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VOLUME 80 (2004) | ISSUE 3 | PAGE 221
Pseudogap behavior of nuclear spin relaxation in high Tc superconductors in terms of phase separation
PACS: 74.25.Ha, 74.72.-h, 76.60.-k
Abstract
We analyze anew experiments on the NMR in cuprates and find an important information on their phase separation and its stripe character hidden in the dependence of 1/63T1 on degree of doping. In a broad class of materials 1/63T1 is the sum of two terms: the temperature independent one attributed to "incommensurate" stripes that occur at external doping, and an "universal" temperature dependent term ascribed to moving metallic and antiferromagnetic sub-phases. We argue that the frustrated first order phase transition in a broad temperature interval bears a dynamical character.