Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2001-04-04
Phys. Rev. B 64, 134419 (2001)
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages RevTeX, 5 PostScript figures included. Final version to appear in PRB
Scientific paper
10.1103/PhysRevB.64.134419
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 plateaux are obtained by means of Abelian bosonization methods which give 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.
Arlego Marcelo
Cabra Daniel C.
Grynberg Marcelo D.
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