Soliton Approach to Spin-Peierls Antiferromagnets: Large-Scale Numerical Results

Details Soliton Approach to Spin-Peierls Antiferromagnets: Large-Scale Numerical Results Soliton Approach to Spin-Peierls Antiferromagnets: Large-Scale Numerical Results

1998-05-28

arxiv.org/abs/cond-mat/9805386v1

Phys Rev B 58, R14701 (1998)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 included eps figures, RevTex 3.0, requires float.sty

Scientific paper

10.1103/PhysRevB.58.R14701

A simple intuitive picture of spin-Peierls antiferromagnets arises from regarding the elementary excitations as S=1/2 solitons. In a strictly one-dimensional system these excitations are assumed not to form bound-states and to be repelled by impurities. Couplings to the three-dimensional lattice are assumed to produce an effective confining potential which binds solitons to antisolitons and to impurities, with the number of bound-states increasing as the interchain coupling goes to 0. We investigate these various assumptions numerically in a phononless model where spontaneous dimerization arises from frustration and the interchain coupling is treated in mean field theory.

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