Session S11: Theory of Superconductivity in Cuprates I

2:30 PM–5:30 PM, Wednesday, March 12, 2008
Morial Convention Center - RO9

Sponsoring Unit: DCMP
Chair: Alexander Balatsky, Los Alamos National Laboratory

Abstract ID: BAPS.2008.MAR.S11.3

Abstract: S11.00003 : Suppression of $d$-wave superconductivity in the weakly inhomogeneous checkerboard Hubbard Model

2:54 PM–3:06 PM

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Authors:

  D.G.S.P. Doluweera
    (University of Cincinnati)

  M. Jarrell
    (University of Cincinnati)

  Th. Maier
    (Oak Ridge National Laboratory)

  A. Macridin
    (University of Cincinnati)

  Th. Pruschke
    (University of Goettingen, Germany)

Using a dynamical cluster quantum Monte Carlo approximation we investigate the $d$-wave superconducting transition temperature T$_{c}$ of the doped 2D Hubbard model with a weak inhomogeneity in the form of checkerboard pattern in the hoppings. The hopping within a 2 $\times $ 2 cluster (plaquette) is $t$ and the hopping between the plaquettes is $t'$ ( 0.8$t \le $ \textit{t' $\le $ t }). We find T$_{c}$ decreases monotonically with decreasing $t' $ for both fixed $U/t$ or $U/W$ ($U$ the on site Hubbard interaction and $W$ the bandwidth). The characteristic spin excitation energy scale and the strength of $d$-wave pairing interaction decrease with decreasing T$_{c}$ suggesting a strong correlation between these two quantities.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.MAR.S11.3