Abstract
We consider the charge excitations of the half-filled Hubbard chain which are related to electron pairs occupying the same lattice site. We have shown that the empty and doubly occupied site states corresponds to antikink and kink states in a continuum field theoretical approach, or to the magnon states of the ferromagnetic Heisenberg chain; i.e. they are charge-magnon states. Considering these particles fully interacting and by solving exactly the two-body scattering problem we obtained new bound excitation states of the charge-magnons. These are charge solitons, as they correspond to the solitons of the equivalent nonlinear Schroedinger equation.
Original language | English |
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Pages (from-to) | 302-306 |
Number of pages | 5 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 184 |
Issue number | 3 |
DOIs | |
Publication status | Published - 5 May 1998 |