paper

Coexistence of strong nematic and superconducting correlations in a two-dimensional Hubbard model

arXiv:1110.5297 · doi:10.1103/PhysRevB.84.220506

Abstract

Using a dynamic cluster quantum Monte Carlo approximation, we study a two-dimensional Hubbard model with a small orthorhombic distortion in the nearest neighbor hopping integrals. We find a large nematic response in the low-frequency single-particle scattering rate which develops with decreasing temperature and doping as the pseudogap region is entered. At the same time, the d-wave superconducting gap function develops an s-wave component and its amplitude becomes anisotropic. The strength of the pairing correlations, however, is found to be unaffected by the strong anisotropy, indicating that d-wave superconductivity can coexist with strong nematicity in the system.

4 pages, 4 figures, published as PRB 84, 220506(R) (2011)

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