32 citations · 78 across the 5 of their papers we have counts for
5 papers
Nematic Fluctuations and Phase Transitions in LaFeAsO: a Raman Scattering Study
U. F. Kaneko, P. F. Gomes, A. F. Garcia-Flores +5
Raman scattering experiments on LaFeAsO with splitted antiferromagnetic (T_AFM = 140 K) and tetragonal-orthorhombic (T_S = 155 K) transitions show a quasi-elastic peak (QEP) in B2g…
Collective Phase-like Mode and the Role of Lattice Distortions at TN~TC in RMn2O5 (R= Pr, Sm, Gd, Tb, Bi)
Néstor E. Massa, Ali F. García-Flores, Domingos De Sousa Meneses +5
We report on electronic collective excitations in RMn2O5 (R= Pr, Sm, Gd, Tb) showing condensation starting at and below TN\simTC\sim40-50 K. Its origin is understood as partial del…
Spin-Electron-Phonon Excitation in Re-based Half-Metallic Double Perovskites
A. F. Garcia-Flores, A. F. L. Moreira, U. F. Kaneko +6
A remarkable hardening (~ 30 cm-1) of the normal mode of vibration associated with the symmetric stretching of the oxygen octahedra for the Ba2FeReO6 and Sr2CrReO6 double perovskit…
Unconventional Landau levels in bulk graphite revealed by Raman spectroscopy
A. F. Garcia-Flores, H. Terashita, E. Granado +1
The electronic Raman scattering of bulk graphite at zero magnetic field reveals a structureless signal characteristic of a metal. For T<~100 K and B > 2 T, several peaks at energie…
Magnetoelastic and thermal effects in the BiMn2O5 lattice: a high-resolution x-ray diffraction study
E. Granado, M. S. Eleoterio, A. F. Garcia-Flores +3
High-resolution synchrotron x-ray diffraction measurements were performed on single crystalline and powder samples of BiMn2O5. A linear temperature dependence of the unit cell volu…