Solitons in the Peierls condensate. II. Amplitude solitons
- 15 January 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 35 (2), 734-745
- https://doi.org/10.1103/physrevb.35.734
Abstract
Charge-density waves whose phase is constrained have amplitude solitons. Exact soliton and soliton lattice solutions for an electron-phonon system in one dimension are constructed by a mapping into the sine-Gordon system. The method is extended to systems with an extrinsic gap parameter as in (AB polymers. Soliton-soliton interactions in the continuum limit are exponential and repulsive. Discrete lattice effects lead to competing interactions which decay as the inverse distance: an attractive force from the finite momentum cutoff and a (usually stronger) repulsive force from coupling with acoustic phonons.
Keywords
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