6 papers · 1 filter
On the scaling of the (H-T)-phase diagram of CuGeO
J. Zeman, G. Martinez, P. H. M. van Loosdrecht +2
The H-T phase diagram of CuGeO has been determined, for different values of the hydrostatic pressure, utilizing optical absorption spectroscopy on the Cu d-d transitions…
Dopant-Bound Spinons in Cu_(1-x)Zn_xGeO_3
G. Els, G. S. Uhrig, P. Lemmens +7
Polarized inelastic light scattering experiments on Cu_(1-x)Zn_xGeO_3 (0<= x <= 0.045) single crystals show for x<>0 a new distinct mode at nearly half the energy of the singlet re…
Revival of the spin-Peierls transition in Cu_xZn_(1-x)GeO_3 under pressure
M. Fischer, P. H. M. van Loosdrecht, P. Lemmens +8
Pressure and temperature dependent susceptibility and Raman scattering experiments on single crystalline Cu_xZn_(1-x)GeO_3 have shown an unusually strong increase of the spin-Peier…
Optical spectroscopy on the spin-Peierls compound CuGeO
P. H. M. van Loosdrecht
An overview is given of Raman and infrared spectroscopic studies of the inorganic spin-Peierls compound CuGeO, with an emphasis on the magnetic fluctuations in the uniform, dim…
Observation of three-magnon light scattering in CuGeO_3
G. Els, P. H. M. van Loosdrecht, P. Lemmens +7
Temperature and magnetic field dependent polarized Brillouin spectra of CuGeO_3 are reported. In addition to a bound singlet state at 30 cm^{-1}, a new feature has been observed at…
Magnetic interactions and the pressure phase-diagram of CuGeO3
P. H. M. van Loosdrecht, J. Zeman, G. Martinez +3
A pressure and temperature dependent Raman study of the vibrational and spin dynamics in CuGeO3 is presented. A new low temperature, high pressure phase has been identified, and a…