IFLP 13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
A COMPARISON BETWEEN DISORDERED QUANTUM SPIN 1/2 CHAINS
Autor/es:
C. A. LAMAS; D. C. CABRA; M. D. GRYNBERG; G. L. ROSSINI
Revista:
PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS
Editorial:
American Physical Society
Referencias:
Lugar: New York; Año: 2006 vol. 74 p. 224435 - 224443
ISSN:
0163-1829
Resumen:
We study the magnetic properties of two types of one dimensional$XX$ spin $1/2$ chains. The first type has only nearest neighborinteractions which can be either antiferromagnetic orferromagnetic and the second type which has both nearest neighborand next nearest neighbor interactions, but only antiferromagneticin character. We study these systems in the presence of lowtransverse magnetic fields both analytically and numerically.Comparison of results show a close relation between the twosystems, which is in agreement with results previously found inHeisenberg chains by means of a numerical real spacerenormalization group procedure.
