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

Abstract

Mott 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.

References in corpus (12)

• Two-Dimensional Geometry of Spin Excitations in the High Temperature Superconductor YBa2Cu3O6+x
• Electronic Structure of Mott Insulators Studied by Inelastic X-ray Scattering
• Superconducting Gap and Strong In-Plane Anisotropy in Untwinned YBa2Cu3O7-d
• Resonant inelastic x-ray scattering study of charge excitations in La2CuO4
• Momentum Dependence of Resonant Inelastic X-Ray Scattering Spectrum in Insulating Cuprates
• Momentum-Resolved Charge Excitations in a Prototype One Dimensional Mott Insulator
• Resonant inelastic x-ray scattering study of holon-antiholon continuum in SrCuO2
• Mott Gap Excitations and Resonant Inelastic X-Ray Scattering in Doped Cuprates
• Resonant inelastic x-ray scattering in one-dimensional copper oxides
• Charge and orbital excitations in Li2CuO2
• Resonant inelastic x-ray scattering study of hole-doped manganites La1-xSrxMnO3 (x=0.2 and 0.4)
• Friedel oscillations in a two-band Hubbard model for CuO chains

Cited by in corpus (23)

• Resonant Inelastic X-ray Scattering Studies of Elementary Excitations
• Self-doping processes between planes and chains in the metal-to-superconductor transition of YBa2Cu3O6.9
• Magnetic nature of the 500 meV peak in $\mathrm{L}{\mathrm{a}}_{2-\mathrm{x}}\mathrm{S}{\mathrm{r}}_{\mathrm{x}}\mathrm{Cu}{\mathrm{O}}_4$ observed with resonant inelastic x-ray scattering at the Cu $K$-edge
• Incident-energy and polarization dependent RIXS study of La2CuO4
• Evolution of plasmon excitations across the phase diagram of the cuprate superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• Theory of resonant inelastic x-ray scattering at the K edge in La${}_2$CuO${}_4$ - Multiple scattering effects -
• Doping dependence of magnetic excitations of 1D cuprates as probed by Resonant Inelastic x-ray Scattering
• Anisotropic softening of collective charge modes in the vicinity of critical doping in a doped Mott insulator
• Momentum Dependent Charge Excitations of Two-Leg Ladder: Resonant Inelastic X-ray Scattering of (La,Sr,Ca)14Cu24O41
• Real-Space Visualization of Remnant Mott Gap and Magnon Excitations
• Resonant inelastic X-ray scattering in a Mott insulator
• Comparison of Resonant Inelastic X-Ray Scattering Spectra and Dielectric Loss Functions in Copper Oxides
• Resonant inelastic X-ray scattering study of overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$
• Screening in YBCO at large wave vectors
• Resonant inelastic X-ray scattering study of intra-band charge excitations in hole-doped high-Tc cuprates
• Charge-transfer and Mott-Hubbard Excitations in FeBO3: Fe K edge Resonant Inelastic X-ray Scattering Study
• Analysis of Incident-Photon-Energy and Polarization Dependent Resonant Inelastic X-Ray Scattering from La${}_2$CuO${}_4$
• High-$T_c$ mechanism through analysis of diverging effective mass for YaBa${}_2$Cu${}_3$O${}_{6+x}$ and pairing symmetry in cuprate superconductors
• Resonant inelastic x-ray scattering in single-crystal superconducting PrFeAsO0.7
• Charge Excitations in Cuprate and Nickelate in Resonant Inelastic X-Ray Scattering
• Theory of RIXS in strongly correlated electron systems: Mott gap excitations in cuprates
• Momentum-resolved charge excitations in high-Tc cuprates studied by resonant inelastic x-ray scattering
• Analysis of Resonant Inelastic X-Ray Scattering in Stripe-Ordered Nickelate