NMR imaging of the soliton lattice profile in the spin-Peierls compound   CuGeO_3
  In the spin-Peierls compound CuGeO$_{3}$, the commensurate-incommensurate transition concerning the modulation of atomic position and the local spin-polarization is fully monitored at T=0 by the application of an external magnetic field ($H$) above a threshold value $H_{c}\simeq $ 13 Tesla. The solitonic profile of the spin-polarization, as well as its absolute magnitude, has been precisely imaged from $^{65}Cu$ NMR lineshapes obtained for $h=(H-H_{c})/H_{c}$ varying from 0.0015 to 2. This offers a unique possibility to test quantitatively the various numerical and analytical methods developed to solve a generic Hamiltonian in 1-D physics, namely strongly interacting fermions in presence of electron-phonon coupling at arbitrary band filling. 
M. Horvatic, Y. Fagot Revurat, C. Berthier (GHMFL, CNRS/MPI,   Grenoble), G. Dhalenne and A. Revcolevschi (LCS, CNRS, Orsay)