Exact solution of a spin-ladder model

Дата и время публикации : 1999-01-18T17:31:17Z

Авторы публикации и институты :
Yupeng Wang

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 6page Revtex, no figure
Первичная категория: cond-mat.str-el

Все категории : cond-mat.str-el

Краткий обзор статьи: An integrable spin-ladder model with nearest-neighbor exchanges and biquadratic interactions is proposed. With the Bethe ansatz solutions of the model hamiltonian, it is found that there are three possible phases in the ground state, i.e., a rung-dimerized phase with a spin gap, and two massless phases. The possible fixed points of the system and the quantum critical behavior at the critical point $J=J_+^c$ are discussed.

Category: Physics