Temperature crossovers in cuprates

Details Temperature crossovers in cuprates Temperature crossovers in cuprates

1996-06-27

arxiv.org/abs/cond-mat/9606208v3

Physics

Condensed Matter

32 Pages, REVTeX, 8 postscript figures

Scientific paper

10.1088/0953-8984/8/48/021

We study the temperature crossovers seen in the magnetic and transport properties of cuprates using a nearly antiferromagnetic Fermi liquid model (NAFLM). For the overdoped cuprates, we find, in agreement with earlier work, mean-field $z=2$ behavior of the magnetic variables associated with the fact that the damping rate of their spin fluctuations is essentially independent of temperature, while the resistivity exhibits a crossover from Fermi liquid behavior at low temperature to linear-in-T above a certain temperature $T_0$, due to the proximity of the quasiparticle Fermi surface to the magnetic Brillouin zone boundary. For the underdoped cuprates we argue that the sequence of crossovers identified by Barzykin and Pines in the low frequency magnetic behavior (from mean field $z=2$ at high temperatures, $T>T_{cr}$, to non-universal $z=1$ scaling behavior at intermediate $T$, $T_*

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