We reconsider transport experiments in strongly anisotropic high-T-c superconducting cuprates and we find that the universal Aslamazov-Larkin paraconductivity in two dimensions is surprisingly robust, even in the underdoped regime below the pseudogap crossover temperature T (*). We also establish that the underlying normal-state resistivity in the pseudogap region is (almost) linear in temperature, with all the deviations being quantitatively accounted for by Aslamazov-Larkin paraconductivity. The disappearance of paraconductivity is ruled by the suppression of Gaussian pair fluctuations at an energy scale related to T (*).
Extended paraconductivity regime in underdoped cuprates / Caprara, Sergio; Grilli, Marco; B., Leridon; J., Lesueur. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 72:10(2005), pp. 104509-1-104509-6. [10.1103/physrevb.72.104509]
Extended paraconductivity regime in underdoped cuprates
CAPRARA, SERGIO;GRILLI, Marco;
2005
Abstract
We reconsider transport experiments in strongly anisotropic high-T-c superconducting cuprates and we find that the universal Aslamazov-Larkin paraconductivity in two dimensions is surprisingly robust, even in the underdoped regime below the pseudogap crossover temperature T (*). We also establish that the underlying normal-state resistivity in the pseudogap region is (almost) linear in temperature, with all the deviations being quantitatively accounted for by Aslamazov-Larkin paraconductivity. The disappearance of paraconductivity is ruled by the suppression of Gaussian pair fluctuations at an energy scale related to T (*).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.