Aharonov-Bohm oscillation of photoionization cross section in a quantum ring with a repulsive scattering center

作者：Xie; Wenfang

来源：Physics Letters A, 2013, 377(12): 903-906.

DOI：10.1016/j.physleta.2013.02.006

• Quantum ring
• Photoionization
• Aharonov-Bohm effect

The photoionization cross section (PCS) associated with intersubband transitions in quantum rings which include a repulsive scattering centre is investigated for the case with the presence of an external magnetic field. Calculations are carried out by using the matrix diagonalization method of the Hamiltonian matrix within the effective-mass approximation. Our results show that both the magnetic field, the ring radius and the impurity can affect the PCS of quantum rings. In addition, we found that the resonant peak of the PCS shows the Aharonov-Bohm oscillation with changing the magnetic field and the ring radius. Moreover, the width of the ring can influence the Aharonov-Bohm oscillation in peak while the resonant peak value of the PCS decreases as the ring width increases in the same ring geometry.

• 出版日期2013-5-3
• 单位广州大学