Zobrazeno 1 - 3
of 3
pro vyhledávání: '"Laukamp, Markus"'
Publikováno v:
Europ. Phys. J. B 7, 67 (1999)
A quantum mechanical picture is presented to describe the behavior of confined spinons in a variety of S=1/2 chains. The confinement is due to dimerization and frustration and it manifests itselfas a nonlinear potential V(x)~ |x|^b, centered at chain
Externí odkaz:
http://arxiv.org/abs/cond-mat/9805245
Autor:
Laukamp, Markus, Martins, George Balster, Gazza, Claudio J., Malvezzi, Andre L., Dagotto, Elbio, Hansen, Patricia M., Lopez, Alfredo C., Riera, Jose
Spin models that have been proposed to describe dimerized chains, ladders, two dimensional antiferromagnets, and other compounds are here studied when some spins are replaced by spinless vacancies, such as it occurs by $Zn$ doping. A small percentage
Externí odkaz:
http://arxiv.org/abs/cond-mat/9707261
Publikováno v:
Phys Rev Lett 78, 3563 (1997)
The local enhancement of antiferromagnetic correlations near vacancies observed in a variety of spin systems is analyzed in a single framework. Variational calculations suggest that the resonating-valence-bond character of the spin correlations at sh
Externí odkaz:
http://arxiv.org/abs/cond-mat/9704185