The Supersymmetric t-J Model with a Boundary

Details The Supersymmetric t-J Model with a Boundary The Supersymmetric t-J Model with a Boundary

1996-05-29

arxiv.org/abs/cond-mat/9605180v2

J. Phys A29 (1996) 6183-6203

Physics

Condensed Matter

23 pages of revtex, discussion on analytic structure of holon S-matrix changed

Scientific paper

10.1088/0305-4470/29/19/006

An open supersymmetric t-J chain with boundary fields is studied by means of the Bethe Ansatz. Ground state properties for the case of an almost half-filled band and a bulk magnetic field are determined. Boundary susceptibilities are calculated as functions of the boundary fields. The effects of the boundary on excitations are investigated by constructing the exact boundary S-matrix. From the analytic structure of the boundary S-matrices one deduces that holons can form boundary bound states for sufficiently strong boundary fields.

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