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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Sociedade Brasileira de Física
2002
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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 |
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Mello,E.V.L. de Caixeiro,E.S. Gonzaléz,J.L. |
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Mello,E.V.L. de Caixeiro,E.S. Gonzaléz,J.L. A novel percolation theory for high temperature superconductors |
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Mello,E.V.L. de Caixeiro,E.S. Gonzaléz,J.L. |
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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. |
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Sociedade Brasileira de Física |
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2002 |
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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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