Effects of proximity to an electronic topological transition on normal state transport properties of the high-Tc superconductors

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dc.creatorAngilella, G. G. N.
dc.creatorPucci, R.
dc.creatorVarlamov, A. A.
dc.creatorOnufrieva, F.
dc.date2003-03-13
dc.date.accessioned2026-07-07T02:50:09Z
dc.date.available2026-07-07T02:50:09Z
dc.descriptionWithin the time dependent Ginzburg-Landau theory, the effects of the superconducting fluctuations on the transport properties above the critical temperature are characterized by a non-zero imaginary part of the relaxation rate gamma of the order parameter. Here, we evaluate Im gamma for an anisotropic dispersion relation typical of the high-Tc cuprate superconductors (HTS), characterized by a proximity to an electronic topological transition (ETT). We find that Im gamma abruptly changes sign at the ETT as a function of doping, in agreement with the universal behavior of the HTS. We also find that an increase of the in-plane anisotropy, as is given by a non-zero value of the next-nearest to nearest hopping ratio r=t'/t, increases the value of | Im gamma | close to the ETT, as well as its singular behavior at low temperature, therefore enhancing the effect of superconducting fluctuations. Such a result is in qualitative agreement with the available data for the excess Hall conductivity for several cuprates and cuprate superlattices.
dc.descriptionto appear in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0303243
dc.identifierhttp://arxiv.org/abs/cond-mat/0303243
dc.identifierPhys. Rev. B 67 (2003) 134525
dc.identifierdoi:10.1103/PhysRevB.67.134525
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21014
dc.subjectSuperconductivity
dc.titleEffects of proximity to an electronic topological transition on normal state transport properties of the high-Tc superconductors
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