Charge-magnon and -soliton states in the one-dimensional Hubbard model

A. R. Bishop, M. Gulacsi*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    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 languageEnglish
    Pages (from-to)302-306
    Number of pages5
    JournalJournal of Magnetism and Magnetic Materials
    Volume184
    Issue number3
    DOIs
    Publication statusPublished - 5 May 1998

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