Incipient order in the t-J model at high temperatures.
We analyze the high-temperature behavior of the susceptibilities towards a number of possible ordered states in the t-J-V model using the high-temperature series expansion. From all diagrams with up to ten edges, reliable results are obtained down to temperatures of order J, or (with some optimism) to J/2. In the unphysical regime, t<J, large superconducting susceptibilities are found which, moreover, increase with decreasing temperatures, but for t>J, these susceptibilities are small and decreasing with decreasing temperature; this suggests that the t-J model does not support high-temperature superconductivity. We also find modest evidence of a tendency toward nematic and d-density wave orders.
Department of Physics, University of California, Riverside, California 92521, USA. leonid@landau.ucr.edu
Leonid P
LP
Pryadko
Steven A
SA
Kivelson
Oron
O
Zachar