2008/06/09 by D. G. S. P. Doluweera, Alexandru Macridin, A. Macridin +5
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Checkerboard #Condensed matter physics #Cuprate #Energy (signal processing) #Geometry #Hubbard model #Mathematics #Monte Carlo method #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum Monte Carlo #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Statistics #Superconductivity #Thermodynamics #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.78.020504
Five pages, four figures. Accepted for Phys. Rev. B (Rapid Com.)
arxiv created 2008/06/09 · openalex publication_date 2008/07/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Using a dynamical cluster quantum Monte Carlo approximation, we investigate the d-wave superconducting transition temperature Tc in the doped two-dimensional repulsive Hubbard model with a weak inhomogeneity. The inhomogeneity is introduced in the hoppings t^\ensuremath' and t in the form of a checkerboard pattern where t is the hopping within a 2\ifmmode×\else\texttimes\fi2 plaquette, and t^\ensuremath' is the hopping between the plaquettes. We find inhomogeneity suppresses Tc. The characteristic spin excitation energy and the strength of d-wave pairing interaction decrease with decreasing Tc, suggesting a strong correlation between these quantities.