Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/10498
Title: Multipole modes and spin features in the Raman spectrum of nanoscopic quantum rings
Author: Emperador, Agustí
Pi Pericay, Martí
Barranco Gómez, Manuel
Lipparini, Enrico
Keywords: Espectroscòpia Raman
Semiconductors
Raman spectroscopy
Semiconductors
Issue Date: 2001
Publisher: The American Physical Society
Abstract: We present a systematic study of ground state and spectroscopic properties of many-electron nanoscopic quantum rings. Addition energies at zero magnetic field (B) and electrochemical potentials as a function of B are given for a ring hosting up to 24 electrons. We find discontinuities in the excitation energies of multipole spin and charge density modes, and a coupling between the charge and spin density responses that allow to identify the formation of ferromagnetic ground states in narrow magnetic field regions. These effects can be observed in Raman experiments, and are related to the fractional Aharonov-Bohm oscillations of the energy and of the persistent current in the ring
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.64.155304
It is part of: Physical Review B, 2001, vol. 64, núm. 15, p. 155304(1)-155304(9)
URI: http://hdl.handle.net/2445/10498
ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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