2004/03/16 by Alexandru Macridin, Mark Jarrell, Thomas Maier · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.70.113105
published as Phys. Rev. B 70, 113105 (2004)
arxiv created 2004/03/16 · openalex publication_date 2004/09/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
Using the dynamical cluster approximation (DCA) we calculate the alternating circulating-current susceptibility and investigate the transition to the d-density wave (DDW) order in the two-dimensional Hubbard model. The 2\ifmmode×\else\texttimes\fi2 cluster used in the DCA calculation is the smallest that can capture d-wave order; therefore, due to the mean-field character of our calculation, we expect to overestimate the DDW transition temperatures. Despite this, we found no transition to the DDW state. On the other hand, DCA captures well the pseudogap features, showing that the pseudogap is not caused by the DDW order. In the pseudogap region the DDW susceptibility is enhanced, as predicted by the slave boson SU(2) theory, but it still is much smaller than the d-wave pairing susceptibility.