Artículos de revistas
INFRARED TRANSITIONS BETWEEN HYDROGENIC STATES IN CYLINDRICAL GAAS-(GA,AL)AS QUANTUM-WELL WIRES
Registro en:
Physical Review B. American Physical Soc, v. 45, n. 16, n. 9420, n. 9423, 1992.
0163-1829
WOS:A1992HR13000066
10.1103/PhysRevB.45.9420
Autor
LATGE, A
PORRASMONTENEGRO, N
OLIVEIRA, LE
Institución
Resumen
Results for the binding and infrared transition energies associated with the ground and first few excited states of a hydrogenic-donor impurity in a cylindrical GaAs-Ga1-xAlxAs quantum-well wire are presented. A variational approach for the trial envelope wave functions corresponding to each donor state is used within the effective-mass approximation. Results are obtained for several wire radii in the case of donors located at the axis of the quantum-well wire. We find that the impurity states 2p(x) (2p(y)) and 3p(x) (3p(y)) are not bounded when the wire radius is sufficiently small, a behavior similar to the one found for impurities in quantum-well heterostructures. 45 16 9420 9423