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VOLUME 80 | ISSUE 3 | PAGE 221
Pseudogap behavior of nuclear spin relaxation in high Tc superconductors in terms of phase separation
L. P. Gor'kov, G. B. Teitel'baum+
National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA and L. D. Landau Institute for Theoretical Physics, 142432 Chernogolovka, Russia
+E. K. Zavoiskii Institute for Technical Physics RAS, 420029 Kazan, Russia


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.


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