Artículo
Random Bond XXZ Chains with Modulated Couplings
Fecha de publicación:
12/2000
Editorial:
American Physical Society
Revista:
Physical Review Letters
ISSN:
0031-9007
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The magnetization behavior of q -periodic antiferromagnetic spin- 1 / 2 Heisenberg chains under uniform magnetic fields is investigated in a background of disorder exchange distributions. By means of both real space decimation procedures and numerical diagonalizations in XX chains, it is found that for binary disorder the magnetization exhibits wide plateaus at values of 1 + 2 ( p − 1 ) / q , where p is the disorder strength. In contrast, no spin gaps are observed in the presence of continuous exchange distributions. We also study the magnetic susceptibility at low magnetic fields.
Palabras clave:
decimation
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Articulos(IFLP)
Articulos de INST.DE FISICA LA PLATA
Articulos de INST.DE FISICA LA PLATA
Citación
Cabra, Daniel Carlos; De Martino, A.; Grynberg, Marcelo Daniel; Peysson, S.; Pujol, P.; Random Bond XXZ Chains with Modulated Couplings; American Physical Society; Physical Review Letters; 85; 22; 12-2000; 4791-4794
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