Pairing properties of the t t^{'}t^{″}J model
Abstract
We study the pairing properties of the twodimensional t t^{'}t^{″}J model, where t^{'} and t^{″} are second and third neighbor hoppings, at a doping level x ≈0.1 . Recent studies of the t t^{'}J model find strong pairing for t^{'}>0 , associated with electron doping, but an absence of pairing for t^{'}<0 , associated with hole doping. This is in contrast to the cuprates, where the highest transition temperatures appear for hole doping. Model parametrizations for the cuprates estimate a t^{″} comparable to t^{'}, which, in principle, might fix this discrepancy. However, we find that it does not; we observe a suppression of pairing for the holedoped system (t^{'}<0 ,t^{″}>0 ) , while for the electrondoped system (t^{'}>0 ,t^{″}<0 ) d wave pairing is robust. Extended hoppings appear to be insufficient to make the oneband t t^{'}J model capable of describing the pairing in the holedoped system.
 Publication:

Physical Review B
 Pub Date:
 November 2022
 DOI:
 10.1103/PhysRevB.106.174507
 arXiv:
 arXiv:2206.07812
 Bibcode:
 2022PhRvB.106q4507J
 Keywords:

 Condensed Matter  Superconductivity
 EPrint:
 Phys. Rev. B 106, 174507 (2022)