Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-07-18
Physics
Condensed Matter
Strongly Correlated Electrons
10 pages, Revtex, 14 figures embedded in the text
Scientific paper
The 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.
Augier David
Hansen Palle
Poilblanc Didier
Riera Jose
Sorensen Erik
No associations
LandOfFree
Interaction between impurities and solitons in quasi one-dimensional spin-Peierls systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Interaction between impurities and solitons in quasi one-dimensional spin-Peierls systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interaction between impurities and solitons in quasi one-dimensional spin-Peierls systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-357108