We report the temperature dependence of the crystal-field-excitation spectrum in La5/3Sr1/3NiO4 by resonant inelastic x-ray scattering at the Ni K edge. Two distinct excitations are observed in the 1-3 eV energy range, in agreement with optical conductivity studies. The temperature dependence of the low-energy spectral weight is found to be closely related to the appearance and suppression of charge ordering. The relation between these crystal-field excitations and the stripe ordering is discussed.
d-d excitations and charge ordering in La5/3Sr1/3NiO4 / L., Simonelli; S., Huotari; M., Filippi; Saini, Naurang Lal; G., Monaco. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 81:(2010), pp. 195124-1-195124-5. [10.1103/physrevb.81.195124]
d-d excitations and charge ordering in La5/3Sr1/3NiO4
SAINI, Naurang Lal;
2010
Abstract
We report the temperature dependence of the crystal-field-excitation spectrum in La5/3Sr1/3NiO4 by resonant inelastic x-ray scattering at the Ni K edge. Two distinct excitations are observed in the 1-3 eV energy range, in agreement with optical conductivity studies. The temperature dependence of the low-energy spectral weight is found to be closely related to the appearance and suppression of charge ordering. The relation between these crystal-field excitations and the stripe ordering is discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
