Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains
We study the magnetic excitations on top of the plateaux states recently discovered in spin-Peierls systems in a magnetic field. We show by means of extensive density matrix renormalization group (DMRG) computations and an analytic approach that one single spin-flip on top of M = 1-2/N (N=3,4,…) pla...
| Autores principales: | , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2007
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/126409 https://journals.aps.org/prb/abstract/10.1103/PhysRevB.75.165104 |
| Aporte de: |
| id |
I19-R120-10915-126409 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Física spin-Peierls systems magnetic field density matrix renormalization group |
| spellingShingle |
Ciencias Exactas Física spin-Peierls systems magnetic field density matrix renormalization group Gazza, Claudio Dobry, Ariel Cabra, Daniel Carlos Vekua, T. Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains |
| topic_facet |
Ciencias Exactas Física spin-Peierls systems magnetic field density matrix renormalization group |
| description |
We study the magnetic excitations on top of the plateaux states recently discovered in spin-Peierls systems in a magnetic field. We show by means of extensive density matrix renormalization group (DMRG) computations and an analytic approach that one single spin-flip on top of M = 1-2/N (N=3,4,…) plateau decays into N elementary excitations each carrying a fraction 1/N of the spin. This fractionalization goes beyond the well-known decay of one magnon into two spinons taking place on top of the M=0 plateau. Concentrating on the 1/3 plateau (N=3) we unravel the microscopic structure of the domain walls which carry fractional spin-1/3, both from theory and numerics. These excitations are shown to be noninteracting and should be observable in x-ray and nuclear magnetic resonance experiments. |
| format |
Articulo Articulo |
| author |
Gazza, Claudio Dobry, Ariel Cabra, Daniel Carlos Vekua, T. |
| author_facet |
Gazza, Claudio Dobry, Ariel Cabra, Daniel Carlos Vekua, T. |
| author_sort |
Gazza, Claudio |
| title |
Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains |
| title_short |
Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains |
| title_full |
Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains |
| title_fullStr |
Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains |
| title_full_unstemmed |
Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains |
| title_sort |
excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains |
| publishDate |
2007 |
| url |
http://sedici.unlp.edu.ar/handle/10915/126409 https://journals.aps.org/prb/abstract/10.1103/PhysRevB.75.165104 |
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Repositorios |
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