1998/01/21 by Tetsuya Mutou, Naokazu Shibata, Kazuo Ueda · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum many-body systems #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.57.13702
published as Phys. Rev. B 57, 13702 (1998) · 4 pages, 6 Postscript figures, REVTeX, submitted to Phys. Rev. B
arxiv created 1998/01/21 · openalex publication_date 1998/06/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the metal-insulator transition accompanied with a charge ordering in the one-dimensional t-J^\ensuremath' model at quarter filling by the density-matrix renormalization-group method. In this model the nearest-neighbor hopping energy t competes with the next-nearest-neighbor exchange energy J^\ensuremath'. We have found that a metal-insulator transition occurs at a finite value of t/J^\ensuremath'; (t/J^\ensuremath')C\ensuremath≃0.18 and the transition is of first order. In the insulating phase for small t/J^\ensuremath', there is an alternating charge ordering and the system behaves as a one-dimensional quantum Heisenberg antiferromagnet. The metallic side belongs to the universality class of the Tomonaga-Luttinger liquids. The quantum phase transition is an example of melting of the one-dimensional quantum Heisenberg antiferromagnet.