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arXiv · 1103.3003

Diagrammatic Quantum Monte Carlo solution of the two-dimensional Cooperon-Fermion model

Kai-Yu Yang·E. Kozik·Xin Wang·M. Troyer
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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 $T_{c}$, 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-$T_{c}$ cuprates, we obtain results in a qualitative agreement with recent torque magnetization measurements.

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Kai-Yu Yang, E. Kozik, Xin Wang, M. Troyer. 2011-03-15. Diagrammatic Quantum Monte Carlo solution of the two-dimensional Cooperon-Fermion model. https://doi.org/10.1103/physrevb.83.214516

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