Dynamical density correlation function of 1D Mott insulators in a magnetic field

Details Dynamical density correlation function of 1D Mott insulators in a magnetic field Dynamical density correlation function of 1D Mott insulators in a magnetic field

2002-04-28

arxiv.org/abs/cond-mat/0204594v1

Phys. Rev. B 66, 165112 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 4 figures

Scientific paper

10.1103/PhysRevB.66.165112

We consider the one dimensional (1D) 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 $\chi_{nn}(\omega,q)$ in the
low-energy limit. When excitons are formed, a singularity appears in
$\chi_{nn}(\omega,q)$ at a particular energy and momentum transfer.

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