Abstract
Corroborating our assertion worked out in preceding papers that the two-chain Hubbard model has a superconducting (SC) parameter region, we report new results obtained by the Lanczos diagonalization method. The SC region indicated by SC pair correlation functions show the tendency to converge to a considerable definite region in the parameter space with increase of the system size. A certain SC correlation function reveals that the SC order parameters pertinent to the two bands have different signs. The SC pair operators at two rungs keep strong spatial correlation in our SC region in striking contrast to the non-SC region. Calculation of correlation exponent K ϱ allows us to get an SC parameter region which proves to be in a qualitative agreement with the above-mentioned one.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.