Magnetic Instability in Strongly Correlated Superconductors

Details Magnetic Instability in Strongly Correlated Superconductors Magnetic Instability in Strongly Correlated Superconductors

2003-03-03

arxiv.org/abs/cond-mat/0303045v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevLett.91.147003

Recently a new phenomenological Hamiltonian has been proposed to describe the superconducting cuprates. This so-called Gossamer Hamiltonian is an apt model for a superconductor with strong on-site Coulomb repulsion betweenthe electrons. It is shown that as one approaches half-filling the Gossamer superconductor, and hence the superconducting state, with strong repulsion is unstable toward an antiferromagnetic insulator an can undergo a quantum phase transition to such an insulator if one increases the on-site Coulomb repulsion.

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