Dynamical density correlation function of one-dimensional Mott insulators in a magnetic field
We consider the one-dimensional extended Hubbard model at half filling in the presence of a magnetic field. Using field theory techniques we calculate the dynamical density-density correlation function Xnn(ω,q) in the low-energy limit. When excitons are formed, a singularity appears in Xnn(ω,q) at a...
| Autores principales: | , |
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| Formato: | Journal article |
| Lenguaje: | English |
| Publicado: |
2002
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