| Revue: | Brazilian journal of physics |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000310494 |
| ISSN: | 0103-9733 |
| Autores: | Orozco, Eduardo A1 González, Jesús D2 Barrera, Martha L |
| Instituciones: | 1Universidad Santo Tomás, Facultad de Ingeniería de Telecomunicaciones, Bucaramanga, Santander. Colombia 2Universidad Autónoma de Bucaramanga, Facultad de Ingeniería y Ciencias Naturales, Bucaramanga, Santander. Colombia |
| Año: | 2006 |
| Periodo: | Sep |
| Volumen: | 36 |
| Número: | 3B |
| Paginación: | 890-893 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | We analyze the effect of the potential shape on the ground state energy of the off-axis neutral donor in GaAs/Ga1-xAl xAs cylindrical nanotube in the presence of the uniform magnetic field applied along the symmetry axis. To take into account the mixing of the low lying subbands we express the wave function as a product of combination of 1s and 2p x,y wave functions with an unknown envelope function that depends only on electron-ion separation. By using variational principle and the functional derivative procedure we derive a one-dimensional differential equation for the envelope function, which we solve numerically by using of the trigonometric sweep method. Results of calculation of the ground state binding energy dependencies on the distance from the donor position to the axis and on the strength of the external magnetic field for square-well, soft-edge-barrier and parabolic bottom potentials are presented. It is shown that the additional peaks in the curves of the density of impurity states appear due to the presence of the repulsive core is nanotube |
| Disciplinas: | Física y astronomía |
| Palabras clave: | Física de materia condensada, Estructura de bandas, Campo magnético, Impurezas, Nanotubos, Energía de enlace |
| Keyword: | Physics and astronomy, Condensed matter physics, Band structure, Magnetic field, Impurities, Nanotubes, Binding energy |
| Texte intégral: | Texto completo (Ver HTML) |
