A novel percolation theory for high temperature superconductors

A novel percolation theory for high temperature superconductors

We present a percolation theory for the high-Tc oxides pseudogap and Tc dependence on the hole level. The doping dependent inhomogeneous charge structure is modeled by a distribution which may represent the stripe morphology and yield a spatial distribution of local Tc(r). The temperature onset of spatial dependent superconducting gap is identified with the vanishing of the pseudogap temperature T*. The transition to a superconducting state corresponds to the percolation threshold among regions of different Tc. As a paradigm we use a Hubbard Hamiltonian with a mean field approximation to yield a doping and temperature dependent superconducting d-wave gap. We show here that this new approach reproduces the phase diagram, explains and gives new insights on several experimental features of high-Tc oxides.

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Main Authors: Mello,E.V.L. de, Caixeiro,E.S., Gonzaléz,J.L.
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Física 2002
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000400007
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spelling oai:scielo:S0103-973320020004000072002-12-04A novel percolation theory for high temperature superconductorsMello,E.V.L. deCaixeiro,E.S.Gonzaléz,J.L.We present a percolation theory for the high-Tc oxides pseudogap and Tc dependence on the hole level. The doping dependent inhomogeneous charge structure is modeled by a distribution which may represent the stripe morphology and yield a spatial distribution of local Tc(r). The temperature onset of spatial dependent superconducting gap is identified with the vanishing of the pseudogap temperature T*. The transition to a superconducting state corresponds to the percolation threshold among regions of different Tc. As a paradigm we use a Hubbard Hamiltonian with a mean field approximation to yield a doping and temperature dependent superconducting d-wave gap. We show here that this new approach reproduces the phase diagram, explains and gives new insights on several experimental features of high-Tc oxides.info:eu-repo/semantics/openAccessSociedade Brasileira de FísicaBrazilian Journal of Physics v.32 n.3 20022002-09-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000400007en10.1590/S0103-97332002000400007
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Mello,E.V.L. de
Caixeiro,E.S.
Gonzaléz,J.L.
spellingShingle Mello,E.V.L. de
Caixeiro,E.S.
Gonzaléz,J.L.
A novel percolation theory for high temperature superconductors
author_facet Mello,E.V.L. de
Caixeiro,E.S.
Gonzaléz,J.L.
author_sort Mello,E.V.L. de
title A novel percolation theory for high temperature superconductors
title_short A novel percolation theory for high temperature superconductors
title_full A novel percolation theory for high temperature superconductors
title_fullStr A novel percolation theory for high temperature superconductors
title_full_unstemmed A novel percolation theory for high temperature superconductors
title_sort novel percolation theory for high temperature superconductors
description We present a percolation theory for the high-Tc oxides pseudogap and Tc dependence on the hole level. The doping dependent inhomogeneous charge structure is modeled by a distribution which may represent the stripe morphology and yield a spatial distribution of local Tc(r). The temperature onset of spatial dependent superconducting gap is identified with the vanishing of the pseudogap temperature T*. The transition to a superconducting state corresponds to the percolation threshold among regions of different Tc. As a paradigm we use a Hubbard Hamiltonian with a mean field approximation to yield a doping and temperature dependent superconducting d-wave gap. We show here that this new approach reproduces the phase diagram, explains and gives new insights on several experimental features of high-Tc oxides.
publisher Sociedade Brasileira de Física
publishDate 2002
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000400007
work_keys_str_mv AT melloevlde anovelpercolationtheoryforhightemperaturesuperconductors
AT caixeiroes anovelpercolationtheoryforhightemperaturesuperconductors
AT gonzalezjl anovelpercolationtheoryforhightemperaturesuperconductors
AT melloevlde novelpercolationtheoryforhightemperaturesuperconductors
AT caixeiroes novelpercolationtheoryforhightemperaturesuperconductors
AT gonzalezjl novelpercolationtheoryforhightemperaturesuperconductors
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