A novel percolation theory for high temperature superconductors

dc.creator	Mello E.V.L. de
dc.creator	Caixeiro E.S.
dc.creator	Gonzaléz J.L.
dc.date	2002
dc.date.accessioned	2013-06-01T09:33:23Z
dc.date.available	2013-06-01T09:33:23Z
dc.date.issued	2013-06-01
dc.identifier	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000400007
dc.identifier	http://www.doaj.org/doaj?func=openurl&genre=article&issn=01039733&date=2002&volume=32&issue=3&spage=705
dc.identifier.uri	http://koha.mediu.edu.my:8181/jspui/handle/123456789/7859
dc.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.
dc.publisher	Sociedade Brasileira de Física
dc.source	Brazilian Journal of Physics
dc.title	A novel percolation theory for high temperature superconductors

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