Diagrammatic Quantum Monte Carlo solution of the two-dimensional Cooperon-Fermion model
Abstract
We investigate the two-dimensional cooperon-fermion model in the correlated regime with a new continuous-time diagrammatic determinant quantum Monte Carlo (DDQMC) algorithm. We estimate the transition temperature Tc, examine the effectively reduced band gap and cooperon mass, and find that delocalization of the cooperons enhances the diamagnetism. When applied to diamagnetism of the pseudogap phase in high-Tc cuprates, we obtain results in a qualitative agreement with recent torque magnetization measurements.
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