Mott gap excitations in twin-free YBa2Cu3O7-d (Tc = 93 K) studied by RIXS

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dc.creatorIshii, K.
dc.creatorTsutsui, K.
dc.creatorEndoh, Y.
dc.creatorTohyama, T.
dc.creatorKuzushita, K.
dc.creatorInami, T.
dc.creatorOhwada, K.
dc.creatorMaekawa, S.
dc.creatorMasui, T.
dc.creatorTajima, S.
dc.creatorMurakami, Y.
dc.creatorMizuki, J.
dc.date2004-09-18
dc.date.accessioned2026-07-07T03:00:54Z
dc.date.available2026-07-07T03:00:54Z
dc.descriptionMott gap excitations in the high-Tc superconductor of the optimal doped YBa2Cu3O7-d (Tc = 93 K) have been studied by the resonant inelastic x-ray scattering method. Anisotropic spectra in the ab-plane are observed in a twin-free crystal. The excitation from the one-dimensional CuO chain is enhanced at 2 eV near the zone boundary of the b* direction, while the excitation from the CuO2 plane is broad at 1.5-4 eV and almost independent of the momentum transfer. Theoretical calculation based on the one-dimensional and two-dimensional Hubbard model reproduces the observed spectra by taking the different parameters of the on-site Coulomb energy. The fact of the Mott gap of the CuO chain site is much smaller than that of CuO2 plane site is observed for the first time.
dc.identifierhttps://arxiv.org/abs/cond-mat/0409477
dc.identifierhttp://arxiv.org/abs/cond-mat/0409477
dc.identifierPhys. Rev. Lett. 94, 187002 (2005)
dc.identifierdoi:10.1103/PhysRevLett.94.187002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24897
dc.subjectStrongly Correlated Electrons
dc.titleMott gap excitations in twin-free YBa2Cu3O7-d (Tc = 93 K) studied by RIXS
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