Interplay of structural and electronic phase separation in single-crystalline La 2 CuO 4.05 studied by neutron and Raman scattering

  title={Interplay of structural and electronic phase separation in single-crystalline La 2 CuO 4.05 studied by neutron and Raman scattering},
  author={Vladimir Gnezdilov and Yu. Pashkevich and John M. Tranquada and Peter Lemmens and Gernot Guentherodt and Andrei V. Yeremenko and Sergei N. Barilo and Sergey V. Shiryaev and L. A. Kurnevich and P. M. Gehring},
  journal={Physical Review B},
We report a neutron- and Raman-scattering study of a single crystal of La2CuO4.05 prepared by hightemperature electrochemical oxidation. Elastic neutron-scattering measurements show the presence of two phases, corresponding to the two edges of the first miscibility gap, all the way up to 300 K. An additional oxygen redistribution, driven by electronic energies, is identified at 250 K in Raman scattering ~RS! experiments by the simultaneous onset of two-phonon and two-magnon scattering, which… 
7 Citations

Figures from this paper

Temperature behavior of conductivity in a La2CuO4 + δ single crystal upon the paramagnetic-antiferromagnetic transition

The temperature dependence of the resistance of a La2CuO4 + δ (δ ≈ 0.05) single crystal with the Neel temperature TN ≈ 205 K was investigated in order to establish the correlation between the

Phase separation in iron chalcogenide superconductor Rb0.8+xFe1.6+ySe2 as seen by Raman light scattering and band structure calculations

We report Raman light scattering in the phase separated superconducting single crystal Rb0.77Fe1.61Se2 with Tc = 32 K over a wide temperature region 3–500 K. The observed phonon lines from the

Excess oxygen doping in chemically oxidized La2CuO4+δ films studied by x-ray diffraction and Raman scattering

High-quality c-axis oriented La2CuO4 films were prepared by an off-axis magnetron sputtering method on a LaSrAlO4(001) substrate. After a chemical oxidation treatment at room temperature using NaClO

Ordering and spin waves inNaNiO2: A stacked quantum ferromagnet

Neutron scattering measurements on powder $\mathrm{Na}\mathrm{Ni}{\mathrm{O}}_{2}$ reveal magnetic Bragg peaks and spin waves characteristic of strongly correlated $s=1∕2$ magnetic moments arranged

Élaboration et caractérisation de films minces de cuprate de lanthane

Lanthanum cuprate is an antiferromagnetique insulator that becomes superconducting when sufficiently oxidized. The aim of this study is to show the feasibility of the lanthanum cuprate thin film

CO 2 -assisted formation of grain boundaries for efficient CO-CO coupling on a derived Cu catalyst

  • Materials Science, Chemistry
  • 2022
: The electrochemical CO 2 reduction reaction (CO 2 RR) on Cu catalyst holds great promise for converting CO 2 into valuable multicarbon (C 2+ ) compounds, but still suffers poor selectivity due to



Gap anisotropy and phonon self-energy effects in single-crystal YBa2Cu3O7- delta.

Gap anisotropy is evidenced by the damping behavior of the 340 cm/sup -1/ Raman-active phonon below T/sub c/, which displays increased attenuation due to phonon-induced pair breaking, consistent with a T = 0 gap.

Raman scattering investigation of the superconducting gap anisotropy in La2−xSrxCuO4

The low energy electronic Raman continua of a La1.83Sr0.17CuO4 single crystal have been obtained in several different scattering geometries, and for temperatures above and below Tc. Based upon the

Phonon Raman scattering in (La1-xSrx)2CuO4 single crystals.

  • Sugai
  • Chemistry
    Physical review. B, Condensed matter
  • 1989

Light-scattering study of the superconducting energy gap in YBa2Cu3O7 single crystals.

Raman scattering experiments have been performed on single-crystal samples of YBa/sub 2/Cu/sub 3/O/sub 7/ in order to investigate superconducting gap excitations. The electronic contribution to the

Carrier relaxation, pseudogap, and superconducting gap in high-Tc cuprates: A Raman scattering study

We describe results of electronic Raman-scattering experiments in differently doped single crystals of Y-123 and Bi-2212. The comparison of AF insulating and metallic samples suggests that at least

Investigation of the superconducting order parameter in Bi2Sr2CaCu2O8 single crystals.

Single crystals of Bi 2 Sr 2 CaCu 2 O 8+δ with different oxygen concentrations were investigated by Raman scattering, finding the superconducting order parameter Δ is temperature dependent and almost constant in the essentially two-dimensional argon-annealed samples.

Dynamics of spin fluctuations in lanthanum cuprate.

The two-dimensional nature of the fluctuations suggested by earlier neutron scattering work is indicated here by the insensitivity of the spectra to temperature as well as to departures from stoichiometry which strongly influence the three-dimensional ordering temperature T/sub N/.

Electronic Raman scattering of superconducting YBa2Cu3Oy single crystals

TheA1g andB1g low-energy Raman continua of YBa2Cu3Oy (Y123) single crystals, withy=7.0, 6.99, and 6.93, have been investigated. It is found that the peak frequency of theA1g continuum is equal to