INVESTIGADORES
BEJAS Matias Hector
artículos
Título:
Close inspection of plasmon excitations in cuprate superconductors
Autor/es:
GRECO, ANDRÉS; YAMASE, HIROYUKI; BEJAS, MATÍAS
Revista:
Physical Review B
Editorial:
American Physical Society
Referencias:
Año: 2020 vol. 102
ISSN:
2469-9950
Resumen:
Recently resonant inelastic x-ray scattering experiments reported fine details of the charge excitations around the in-plane momentum q∥=(0,0) for various doping rates in electron-doped cuprates La2−xCexCuO4. We find that those new experimental data are well captured by acousticlike plasmon excitations in a microscopic study of the layered t−J model with the long-range Coulomb interaction. The acousticlike plasmon is not a usual plasmon typical to the two-dimensional system, but has a small gap proportional to the interlayer hopping tz.
