Laboratoire Léon Brillouin
UMR12 CEA-CNRS, Bât. 563 CEA Saclay
91191 Gif sur Yvette Cedex, France
D. Bounoua, R. Saint-Martin, S. Petit, P. Berthet, F. Damay, Y. Sidis, F. Bourdarot, and L. Pinsard-Gaudart, Phys. Rev. B 95, 224429
The low energy magnetic excitations spectra of the pristine and doped quasi-one-dimensional spin chains cuprates SrCuO2 have been investigated by inelastic neutron scattering. The momentum-integrated magnetic dynamical structure factor yields a constant integrated intensity with regard to energy in the pure compound, while it shows a strong decay, at low energies, in the compounds doped with nonmagnetic impurities, namely, SrCu0.99M0.01O2 (with M=Zn or Mg) and Sr0.99La0.01CuO2 (Cu+ carrying S=0 created within the chains). These results evidence the opening of a spin pseudogap in the two-spinon continuum of SrCuO2 upon doping, stemming from disruptions of the spin chains by quantum impurities.
• Physics, chemistry, nanoscience and materials around large instruments › Physique de la matière condensée, étude par l’interaction rayonnement matière Statistical physics and complex systems › Statistical physics and complex systems Physique, chimie, nanosciences et matériaux autour des grands instruments Systèmes complexes et transition énergétique
• Laboratoire Léon Brillouin (LLB) • Leon Brillouin Laboratory (LLB)
• Strongly correlated quantum materials and magnetism