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Article Dans Une Revue Physical Review B Année : 2017

Impurity-induced spin pseudogap in SrCuO₂ doped with Mg, Zn, or La

Résumé

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.
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hal-03869775 , version 1 (24-11-2022)

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Dalila Bounoua, Romuald Saint-Martin, Sylvain Petit, Patrick Berthet, Françoise Damay, et al.. Impurity-induced spin pseudogap in SrCuO₂ doped with Mg, Zn, or La. Physical Review B, 2017, 95 (22), pp.224429. ⟨10.1103/PhysRevB.95.224429⟩. ⟨hal-03869775⟩
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