TY - JOUR
T1 - Suppression of d -wave superconductivity in the checkerboard Hubbard model
AU - Doluweera, D. G.S.P.
AU - Macridin, A.
AU - Maier, T. A.
AU - Jarrell, M.
AU - Pruschke, Th
PY - 2008/7/9
Y1 - 2008/7/9
N2 - 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′ and t in the form of a checkerboard pattern where t is the hopping within a 2×2 plaquette, and t′ 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.
AB - 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′ and t in the form of a checkerboard pattern where t is the hopping within a 2×2 plaquette, and t′ 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.
UR - http://www.scopus.com/inward/record.url?scp=47349125694&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.78.020504
DO - 10.1103/PhysRevB.78.020504
M3 - Article
AN - SCOPUS:47349125694
SN - 1098-0121
VL - 78
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 2
M1 - 020504
ER -