High Tc Phase Diagram based on the SU(2) Slave-Boson Approach to the t-J Hamiltonian
Abstract
Based on an improved SU(2) slave-boson approach to the t-J Hamiltonian, we derive a phase diagram of high Tc cuprates which displays both the superconducting and pseudogap phases in the plane of temperature vs. hole doping rate. It is shown that the inclusion of phase fluctuations in the order parameters results in a closer agreement with the observed superconducting temperature(bose condensation line) of an arch shape as a function of hole doping rate.
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