63 citations · 214 across the 15 of their papers we have counts for
15 papers
Correlation between optical phonon softening and superconducting in YBaCuO within -wave Eliashberg theory
Cunyuan Jiang, Giovanni A. Ummarino, Matteo Baggioli +2
We provide a mathematical description, based on d-wave Eliashberg theory, of the strong correlation between the experimentally observed softening of Raman modes associated with in-…
Constrains on s and d components of electron boson coupling constants in one band d wave Eliashberg theory for high Tc superconductors
Giovanni Alberto Ummarino
The phenomenology of overdoped high Tc superconductors can be described by a one band d wave Eliashberg theory where the mechanism of superconducting coupling is mediated by antife…
Magnetic interactions and the puzzling absence of any Raman mode in EuTiO3
P. Pappas, E. Liarokapis, M. Calamiotou +1
Polycrystalline ceramic samples and a single crystal of EuTiO3 have been investigated by Raman spectroscopy in the temperature range 80-300 K. Although synchrotron XRD data clearly…
Raman study of the anharmonicity in YBaCuO
E. Liarokapis
A systematic Raman study in the visible carried out on the YBa2Cu316,18Ox (x=6-7) compounds, with isotopic substitution of 18O for 16O, has detected a doping dependent deviation fr…
Local lattice distortions vs. structural phase transition in NdFeAsO1-xFx
M. Calamiotou, D. Lampakis, N. D. Zhigadlo +5
The lattice properties at low temperatures of two samples of NdFeAsO1-xFx (x=0.05 and 0.25) have been examined in order to investigate possible structural phase transition that may…
Pressure-Temperature phase diagram of multiferroic EuTiO
P. Parisiades, E. Liarokapis, J. Köhler +2
The structural transformation of multiferroic EuTiO has been intensively investigated by synchrotron x-ray diffraction at pressures up to 50.3 GPa and temperatures from 50 to 5…