Pairing Properties of the --- model
arXiv:2206.07812 · doi:10.1103/PhysRevB.106.174507
Abstract
We study the pairing properties of the two-dimensional --- model, where and are second and third neighbor hoppings, at a doping level . Recent studies of the -- model find strong pairing for , associated with electron doping, but an absence of pairing for associated with hole doping. This is in contrast to the cuprates, where the highest transition temperatures appear for hole doping. Model parameterizations for the cuprates estimate a comparable to , which, in principle, might fix this discrepancy. However, we find that it does not; we observe a suppression of pairing for the hole-doped system () while for the electron-doped system () -wave pairing is robust. Extended hoppings appear to be insufficient to make the one-band -- model capable of describing the pairing in the hole doped system.
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