Abstract
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 between the electrons. It is shown that at half-filling the Gossamer superconductor with strong repulsion is unstable toward an antiferromagnetic insulator. The superconducting state undergoes a quantum phase transition to an antiferromagnetic insulator as one increases the on-site Coulomb repulsion. Near the transition the Gossamer superconductor becomes spectroscopically indistinguishable from the insulator.
Original language | English (US) |
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Journal | Physical review letters |
Volume | 91 |
Issue number | 14 |
DOIs | |
State | Published - 2003 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy