INVESTIGADORES
LAMAS Carlos Alberto
artículos
Título:
Combined analytical and numerical approach to study magnetization plateaux in doped quasi-one-dimensional antiferromagnets
Autor/es:
C. A. LAMAS; S. CAPPONI; P. PUJOL
Revista:
PHYSICAL REVIEW B
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2011 vol. 84 p. 115125 - 115126
ISSN:
1098-0121
Resumen:
We investigate the magnetic properties of quasi-one-dimensional quantum spin-S antiferromagnets.
We use a combination of analytical and numerical techniques to study
the presence of plateaux in the magnetization curve. The analytical
technique consists in a path integral formulation in terms of coherent
states. This technique can be extended to the presence of doping and has
the advantage of a much better control for large spins than the usual
bosonization technique. We discuss the appearance of doping-dependent
plateaux in the magnetization curves for spin-S chains
and ladders. The analytical results are complemented by a density
matrix renormalization group (DMRG) study for a trimerized spin-1/2 and anisotropic spin-3/2 doped chains.