2014/02/28 by Philippe Corboz, T. M. Rice, Matthias Troyer · 2 citations
Physics and Astronomy · #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.113.046402
published as Phys. Rev. Lett. 113, 046402 (2014) · 6 pages, 4 figures, 4 pages of supplemental material
arxiv created 2014/08/20 · arxiv updated 2015/06/18
Variational studies of the t-J model on the square lattice based on infinite projected-entangled pair states (iPEPS) confirm an extremely close competition between a uniform d-wave superconducting state and different stripe states. The site-centered stripe with an in-phase d-wave order has an equal or only slightly lower energy than the stripe with anti-phase d-wave order. The optimal stripe filling is not constant but increases with J/t. A nematic anisotropy reduces the pairing amplitude and the energies of stripe phases are lowered relative to the uniform state with increasing nematicity.