Three magnon excitations in alternating quantum spin/bond chains
| 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.degree.discipline | Physics and Astronomy | en_US |
| dc.degree.level | Master of Science (M.Sc.) | en_US |
| 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.identifier.uri | http://hdl.handle.net/1993/1039 | |
| dc.language.iso | eng | en_US |
| dc.rights | open access | en_US |
| dc.title | Three magnon excitations in alternating quantum spin/bond chains | en_US |
| dc.type | master thesis | en_US |