Metal-Insulator Transition Accompanied with a Charge Ordering in the One-dimensional t-J' Model

Details Metal-Insulator Transition Accompanied with a Charge Ordering in the One-dimensional t-J' Model Metal-Insulator Transition Accompanied with a Charge Ordering in the One-dimensional t-J' Model

1998-01-21

arxiv.org/abs/cond-mat/9801205v1

Phys. Rev. B 57, 13702 (1998)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 6 Postscript figures, REVTeX, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.57.13702

We study the metal-insulator transition accompanied with a charge ordering in the one-dimensional (1D) t-J' 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'. We have found that a metal-insulator transition occurs at a finite value of t/J'; (t/J')_C = 0.18 and the transition is of first order. In the insulating phase for small t/J', there is an alternating charge ordering and the system behaves as a 1D 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 1D quantum Heisenberg antiferromagnet.

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