Formation of clusters in the two dimensional t-J model: The mechanism for phase separation

Details Formation of clusters in the two dimensional t-J model: The mechanism for phase separation Formation of clusters in the two dimensional t-J model: The mechanism for phase separation

2006-05-09

arxiv.org/abs/cond-mat/0605229v1

J. Phys.: Condens. Matter 18 (2006) 4935-4944

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages and 3 figures

Scientific paper

10.1088/0953-8984/18/20/017

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 x L clusters. Clusters of the first type are completely occupied with electrons, i.e. they carry maximal charge Q_e=L^2 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 Q_h0.5) it turns out that hole clusters are occupied with an even number Q_h

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