Interplay between quasi-periodicity and disorder in quantum spin chains in a magnetic field

Details Interplay between quasi-periodicity and disorder in quantum spin chains in a magnetic field Interplay between quasi-periodicity and disorder in quantum spin chains in a magnetic field

2002-01-24

arxiv.org/abs/cond-mat/0201443v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 RevTeX pages, 5 Postscript figures included

Scientific paper

10.1103/PhysRevB.66.052419

We study the interplay between disorder and a quasi periodic coupling array in an external magnetic field in a spin-1/2 XXZ chain. A simple real space decimation argument is used to estimate the magnetization values where plateaux show up. The latter are in good agreement with exact diagonalization results on fairly long XX chains. Spontaneous susceptibility properties are also studied, finding a logarithmic behaviour similar to the homogeneously disordered case.

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