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Título: | Study of electronic properties, magnetization and persistent currents in a mesoscopic ring by controlled curvature |
Palavras-chave: | Quantum ring Aharonov-Bohm Haas-van Alphen Persistent current Curved surface Magnetization Anel quântico Corrente persistente Magnetização |
Data do documento: | Ago-2021 |
Editor: | Elsevier |
Citação: | PEREIRA, L. F. C. et al. Study of electronic properties, magnetization and persistent currents in a mesoscopic ring by controlled curvature. Physica E: Low-dimensional Systems and Nanostructures, [S. I.], v. 132, Aug. 2021. DOI: https://doi.org/10.1016/j.physe.2021.114760. |
Resumo: | We study the model of a noninteracting spinless electron gas confined to the two-dimensional localized surface of a cone in the presence of external magnetic fields. The localized region is characterized by an annular radial potential. We write the Schrödinger equation and use the thin-layer quantization procedure to calculate the wavefunctions and the energy spectrum. In such a procedure, it arises a geometry induced potential, which depends on both the mean and the Gaussian curvatures. Nevertheless, since we consider a ring with a mesoscopic size, the effects of the Gaussian curvature on the energy spectrum are negligible. The magnetization and the persistent current are analyzed. In the former, we observed the Aharonov-Bohm (AB) and de Haas-van Alphen (dHvA) types oscillations. In the latter, it is observed only the AB type oscillations. In both cases, the curvature increases the amplitude of the oscillations. |
URI: | https://doi.org/10.1016/j.physe.2021.114760 http://repositorio.ufla.br/jspui/handle/1/49546 |
Aparece nas coleções: | DFI - Artigos publicados em periódicos |
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