1

2

Monte Carlo data (Takahashi) on S=1 HAF

3

Neutron scattering data on NENP

4

5

Cu

local environment of Cu2+ ions alternates along chains

6

H2/3

7

soliton

breathersoliton

8

9

we have included in fit a linear term in width which comes from exchange anisotropy

10

11

12