Physics – Condensed Matter – Superconductivity
Scientific paper
2001-08-06
Phys. Rev. B 65, 104508 (2002)
Physics
Condensed Matter
Superconductivity
14 eps figures. added discussion on how to calculate correlations using the CORE method, updated references
Scientific paper
10.1103/PhysRevB.65.104508
The strongly interacting Hubbard model on the square lattice is reduced to the low energy Plaquette Boson Fermion Model (PBFM). The four bosons (an antiferromagnon triplet and a d-wave hole pair), and the fermions are defined by the lowest plaquette eigenstates. We apply the Contractor Renormalization method of Morningstar and Weinstein to compute the boson effective interactions. The range-3 truncation error is found to be very small, signaling short hole-pair and magnon coherence lengths. The pair-hopping and magnon interactions are comparable, which explains the rapid destruction of antiferromagnetic order with emergence of superconductivity, and validates a key assumption of the projected SO(5) theory. A vacuum crossing at larger doping marks a transition into the overdoped regime. With hole fermions occupying small Fermi pockets and Andreev coupled to hole pair bosons, the PBFM yields several testable predictions for photoemmission, tunneling asymmetry and entropy measurements.
Altman Ehud
Auerbach Assa
No associations
LandOfFree
Plaquette Boson-Fermion Model of Cuprates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Plaquette Boson-Fermion Model of Cuprates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plaquette Boson-Fermion Model of Cuprates will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-326675