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Formation of clusters in the 2D t-J model: The mechanism for phase separation
, Article Journal of Physics Condensed Matter ; Volume 18, Issue 20 , 2006 , Pages 4935-4944 ; 09538984 (ISSN) ; Langari, A ; Mutter, K. H ; Sharif University of Technology
2006
Abstract
The emergence of phase separation is investigated in the framework of a 2D t-J model by means of a variational product ansatz, which covers the infinite lattice by two types of L × L clusters. Clusters of the first type are completely occupied with electrons, i.e. they carry maximal charge Qe = L2 and total spin 0, and thereby form the antiferromagnetic background. Holes occur in the second type of clusters - called 'hole clusters'. They carry a charge Qh0.5) it turns out that hole clusters are occupied with an even...