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Long-Range Incommensurate Charge Fluctuations in (Y,Nd)Ba2Cu3O6+x
A State of High Tc Superconductivity There are strong indications that high-temperature superconductivity in the cuprates is formed amid competing orders, but only two have been observed…
SAXES, a high resolution spectrometer for resonant x-ray emission in the 400-1600 eV energy range
We present a 5m long spectrometer for soft x rays to be used at a synchrotron radiation beamline for resonant x-ray emission spectroscopy and resonant inelastic x-ray scattering in the 400–1600eV…
Energy and symmetry of dd excitations in undoped layered cuprates measured by Cu L-3 resonant inelastic x-ray scattering
We measured the high-resolution Cu L-3 edge resonant inelastic x-ray scattering (RIXS) of undoped cuprates La2CuO4, Sr2CuO2Cl2, CaCuO2 and NdBa2Cu3O6. The dominant spectral features were assigned to…
Momentum-dependent charge correlations in YBa2Cu3O6+δ superconductors probed by resonant X-ray scattering: evidence for three competing phases.
The results indicate a three-phase competition between spin-modulated, charge- modulated, and superconducting states in underdoped YBa(2)Cu(3)O(6+δ) samples with highly ordered chain arrays of oxygen acceptors.
Dispersive charge density wave excitations in Bi2Sr2CaCu2O8+[delta]
Ultrahigh-resolution resonant inelastic X-ray scattering shows how dispersive charge density wave excitations influence the charge and lattice degrees of freedom in a high-Tc cuprate, pointing to a…
Charge order and its connection with Fermi-liquid charge transport in a pristine high-T(c) cuprate.
The observation of charge-density-wave correlations in the model cuprate superconductor HgBa2CuO(4+δ) (T(c)=72 K) via bulk Cu L3-edge-resonant X-ray scattering points to a unifying picture in which these two phenomena are preceded at the higher pseudogap temperature by q=0 magnetic order and the build-up of significant dynamic antiferromagnetic correlations.
Intense paramagnon excitations in a large family of high-temperature superconductors
In the copper oxide superconductors, spin fluctuations might be involved in the electronic pairing mechanism. The case for such magnetically mediated superconductivity is now strengthened by the…
Directly characterizing the relative strength and momentum dependence of electron-phonon coupling using resonant inelastic x-ray scattering
T. P. Devereaux,1, 2 A. M. Shvaika,3 K. Wu,1 K. Wohlfeld,4 C. J. Jia,1 Y. Wang,1 B. Moritz,1 L. Chaix,1 W.-S. Lee,1 Z.-X. Shen,1, 2, 5 G. Ghiringhelli,6 and L. Braicovich6 Stanford Institute for…
Dynamical charge density fluctuations pervading the phase diagram of a Cu-based high-Tc superconductor
A comprehensive study of charge density fluctuations in a cuprate family, varying doping and temperature found that short-range dynamic charge fluctuations were present in a large portion of the phase diagram, at temperatures considerably higher than those at which the CDW order disappears.
Influence of apical oxygen on the extent of in-plane exchange interaction in cuprate superconductors
A detailed resonant inelastic X-ray scattering (RIXS) study of a series of well-known cuprate superconductors reveals a correlation between the number of apical oxygens in these systems, and the…