Artículo
Pygmy resonances in artificial nuclei far-infrared absorption by electron-hole droplets
Autor/es | Capote, Roberto
Delgado, Alain González, Augusto |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2001-01-30 |
Fecha de depósito | 2017-09-06 |
Publicado en |
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Resumen | The structure of E1 resonances has been examined in a microscopic random phase approximation calculation for neutral, symmetric, closed shell and electron-hole systems in a quantum dot. The number of electron-hole pairs, ... The structure of E1 resonances has been examined in a microscopic random phase approximation calculation for neutral, symmetric, closed shell and electron-hole systems in a quantum dot. The number of electron-hole pairs, N, is varied from 6 to 42. The occurrence of small, but distinct, E1 peaks in the far-infrared spectra located in the low energy tail of the giant dipole resonance consisting of highly coherent electron-hole excitations is predicted. These pygmy resonances account for about 2% of the dipole energy-weighted photoabsorption sum rule. A very weak dependence of the average pygmy resonance energy on the number of electron-hole pairs is found. |
Cita | Capote, R., Delgado, A. y González, A. (2001). Pygmy resonances in artificial nuclei far-infrared absorption by electron-hole droplets. Modern Physics Letters B, 15 (2), 81-87. |
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