dc.contributor.author Martinez Cuellar, Jose Luis en_US dc.date.accessioned 2007-05-15T15:26:54Z dc.date.available 2007-05-15T15:26:54Z dc.date.issued 1997-06-01T00:00:00Z en_US dc.identifier.uri http://hdl.handle.net/1993/1039 dc.description.abstract In this thesis we examine the nature of three magnon excitations in alternating spin/bond ferromagnetic chains. We study a Hamiltonian that describes a chain (composed of two non-identical one-dimensional uniform and homogeneous sublattices) with alternating spin magnitudes, S and $S\sp\prime$, and alternating nearest neighbor interactions, $J\sb1$ and $J\sb2.$ The Recursion Method is used to locate the bound states and their relationship to the three-magnon continuum. The specific cases studied are the S = $S\sp\prime$ = 1/2, S = $2S\sp\prime$ = 1, and S = $S\sp\prime$ = 1 alternating spin chains. We consider not only the effects of spin alternation but also of varying strengths. For each case, we studied different bond sets, more exactly, $J\sb1$ = 1 and $J\sb2$ equal to 0, 1/4, 1/2 and 1. en_US dc.format.extent 4316691 bytes dc.format.extent 184 bytes dc.format.mimetype application/pdf dc.format.mimetype text/plain dc.language.iso eng en_US dc.rights info:eu-repo/semantics/openAccess dc.title Three magnon excitations in alternating quantum spin/bond chains en_US dc.type info:eu-repo/semantics/masterThesis dc.type master thesis en_US dc.degree.discipline Physics and Astronomy en_US dc.degree.level Master of Science (M.Sc.) en_US
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