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Pi excitation of the t-J model
Eugene Demler, Hiroshi Kohno, Shou-Cheng Zhang
In this paper, we present analytical and numerical calculations of the pi resonance in the t-J model. We show in detail how the pi resonance in the particle-particle channel couple…
Proximity Effect and Josephson Coupling in the SO(5) Theory of High-Tc Superconductivity
E. Demler, A. J. Berlinsky, C. Kallin +2
We consider proximity effect coupling in Superconducting/Antiferromagnetic/Superconducting (S-A-S) sandwiches using the recently developed SO(5) effective theory of high temperatur…
Microscopic Electron Models with Exact SO(5) Symmetry
Silvio Rabello, Hiroshi Kohno, Eugene Demler +1
We construct a class of microscopic electron models with exact SO(5) symmetry between antiferromagnetic and d-wave superconducting ground states. There is an exact one-to-one corre…
Response to Greiter's Comment
Eugene Demler, Shou-Cheng Zhang, Stefan Meixner +1
Greiter claimed erroneously that the pi-excitation of the Hubbard model has an energy of the order of U. This mistake originates from a inconsistent treatment of the two particle H…
Search for the πResonance in Two Particle Tunneling Experiments of YBCO Superconductors
Y. Bazaliy, E. Demler, S. C. Zhang
A recent theory of the resonant neutron scattering peaks in YBCO superconductors predicts the existence of a sharp spin triplet two particle collective mode (the ``πresonance") in…
Finite-Size Studies on the SO(5) Symmetry of the Hubbard Model
Stefan Meixner, Werner Hanke, Eugene Demler +1
We present numerical evidence for the approximate SO(5) symmetry of the Hubbard model on a 10 site cluster. Various dynamic correlation functions involving the operators, the g…