Edge Magnetic Field in the xxz Spin-1/2 Chain

Details Edge Magnetic Field in the xxz Spin-1/2 Chain Edge Magnetic Field in the xxz Spin-1/2 Chain

1997-10-21

arxiv.org/abs/cond-mat/9710221v2

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, further result added, to appear in J. Phys. A

Scientific paper

10.1088/0305-4470/31/12/003

The critical behavior associated with a transverse magnetic field applied at the edge of a semi-infinite xxz S=1/2 chain is calculated using field theory techniques. Contrary to a recent claim, we find that the long-time behavior is given by a renormalization group fixed point corresponding to an infinite field which polarizes the spin at the edge. The zero temperature entropy and position-dependent magnetization are calculated.

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