We study the interplay between a (quasi) periodic coupling array and an external magnetic field in a spin-1/2 XXZ chain. A new class of magnetization plateau is obtained by means of Abelian bosonization methods which gives rise to a sufficient quantization condition. The investigation of magnetic phase diagrams via exact diagonalization of finite clusters finds a complete agreement with the continuum treatment in a variety of situations.
Información general
Fecha de publicación:12 de septiembre de 2001
Idioma del documento:Inglés
Revista:Physical Review B; vol. 64, no. 13
Institución de origen:Instituto de Física La Plata