288 citations · 3.1k across the 78 of their papers we have counts for
8 papers · 1 filter
Incommensurability in the magnetic excitations of the bilinear-biquadratic spin-1 chain
O. Golinelli, Th. Jolicoeur, E. Sorensen
We study the magnetic excitation spectrum of the S=1 quantum Heisenberg spin chain with Hamiltonian : H = sum_i cos(theta) S_i S_i+1 + sin(theta) (S_i S_i+1)^2. We focus on the ran…
Investigation of soliton bound states in the Raman spectrum of pure and doped spin-Peierls chains
D. Augier, E. Sorensen, J. Riera +1
We investigate the occurrence of singlet bound states in the Raman spectrum of dimerized spin 1/2 chains by Exact Diagonalization and Density Matrix Renormalization Group technique…
Interaction between impurities and solitons in quasi one-dimensional spin-Peierls systems
D. Augier, P. Hansen, D. Poilblanc +2
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, quant…
Soliton Approach to Spin-Peierls Antiferromagnets: Large-Scale Numerical Results
E. Sorensen, I. Affleck, D. Augier +1
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 excitatio…
Dynamical effects of phonons on soliton binding in spin-Peierls systems
D. Augier, D. Poilblanc, E. Sorensen +1
The role of dynamical magneto-elastic coupling in spin-Peierls chains is investigated by numerical and analytical techniques. We show that a Heisenberg spin chain coupled to dynami…
Chain-Boundary Excitations in the Haldane Phase of 1D Systems
E. Polizzi, F. Mila, E. S. Sorensen
The chain-boundary excitations occurring in the Haldane phaseof antiferromagnetic spin chains are investigated. The bilinear-biquadratic hamiltonian is used to study…