2001/08/31 by J. Riera, Jose A. Riera · 2 citations
Materials Science · Physics and Astronomy · #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.65.064524
minor changes, to be published in Physical Review B
arxiv created 2001/11/22 · openalex publication_date 2002/01/22 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study a two-dimensional t\ensuremath-J model close to the Ising limit in which charge inhomogeneity is stabilized by an on-site potential es, by using diagonalization in a restricted Hilbert space and finite temperature quantum Monte Carlo techniques. Both site- and bond-centered stripes are considered and their similitudes and differences are analyzed. The amplitude of charge inhomogeneity is studied as es\ensuremath→0. Moreover, we show that the antiphase domain ordering occurs at a much lower temperature than the formation of charge inhomogeneities and charge localization. Hole-hole correlations indicate a metallic behavior of the stripes with no signs of hole attraction. Kinetic energies and current susceptibilities are computed and indications of charge localization are discussed. The study of the doping dependence in the range 0.083<~x<~0.167 suggests that these features are characteristic of the whole underdoped region.