NMR imaging of the soliton lattice profile in the spin-Peierls compound CuGeO_3

Details NMR imaging of the soliton lattice profile in the spin-Peierls compound CuGeO_3 NMR imaging of the soliton lattice profile in the spin-Peierls compound CuGeO_3

1998-12-22

arxiv.org/abs/cond-mat/9812370v1

Phys. Rev. Lett. 83, (1999), pp.420-3

Physics

Condensed Matter

Strongly Correlated Electrons

3 pages, 4 eps figures, RevTeX, submitted to Physical Review Letter

Scientific paper

10.1103/PhysRevLett.83.420

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.

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