Interaction between impurities and solitons in quasi one-dimensional spin-Peierls systems

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dc.creatorAugier, D.
dc.creatorHansen, P.
dc.creatorPoilblanc, D.
dc.creatorRiera, J.
dc.creatorSorensen, E.
dc.date1998-07-18
dc.date.accessioned2026-07-07T03:11:06Z
dc.date.available2026-07-07T03:11:06Z
dc.descriptionThe role of the spin-phonon coupling in spin-Peierls chains doped with spin-0 or spin-1 impurities is investigated by various numerical methods such as exact diagonalization, quantum Monte Carlo simulations and Density Matrix Renormalization Group. Various treatments of the lattice, in a fully quantum mechanical way, classically in the adiabatic approximation or using a fixed three-dimensional dimerization pattern are compared. For an isolated chain, strong bonds form between the two spin-1/2 sites next to the impurity site, leading to the appearance of magneto-elastic solitons. We also show that these excitations do not bind to spin-0 impurities but are weakly attracted by spin-1 impurities. However, the interchain elastic coupling generates an effective confining potential at the non-magnetic impurity site which can lead to the formation of soliton-impurity bound states. We also predict that a soliton and an antisoliton bound to two impurities on the same chain can annihilate each other when the separation between the impurities is smaller than a critical value depending on the interchain elastic constant.
dc.description10 pages, Revtex, 14 figures embedded in the text
dc.identifierhttps://arxiv.org/abs/cond-mat/9807265
dc.identifierhttp://arxiv.org/abs/cond-mat/9807265
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/28449
dc.subjectStrongly Correlated Electrons
dc.subjectStatistical Mechanics
dc.titleInteraction between impurities and solitons in quasi one-dimensional spin-Peierls systems
dc.typetext

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