Coupled donors in quantum ring in a threading magnetic field

Aharonov-Bohm Effect in Quantum Nanocups

“…The Scrhödinger equation is solved using the effective mass framework and its lateral dimension, parameters R 1 and R 2 , is considered greater than the H 1 and H 2 dimensions. For this situation, and using the adiabatic approximation formalism [2,18], the wave function Φ(ρ; z) can be choose as where f(ρ,z) is, for a fixed r:…”

“…Dias da Silva [17] studied the interplay between impurity scattering and Coulomb interaction effects in the absorption spectrum of neutral bound magnetoexcitons confined in quantum-ring structures, they shows that, although a strong impurity scattering kills the AB oscillations in the energy levels. Gutierrez et al [18] studied the electronic states of a singly ionized double donor system (D2 + ) confined in a nanostructure with a ring-like geometry in a threading magnetic field, they show that the relative position between impurities affect the Aharonov-Bohm oscillations of the far-infrared spectra and produce a quenching of oscillations of the impurity lower energy levels. Čucaric et al [19] studied the electronic structure of the conduction and valence bands of a nanocup consists of a GaAs nanodisk (the cups bottom) and a GaAs nanoring which encircles the disk, they analyzed how the electronic structure with the size of the structure…”

Hydrostatic pressure, temperature and aluminum concentration effects on the ground state of coupled donors in a GaAs–Ga1−xAlxAs quantum well

“…Despite neutral donor impurities have attracted much attention, nowadays, the singly ionized double donor system (two fixed nuclei sharing an electron) in a thin semiconductor host has become an interesting case of study, due to the possibility to build novel high‐tech opto‐electronic devices intended for quantum computing . According to the information provided in several theoretical works , by appropriated manipulation of the molecular properties such as the energy level separation and spatial electronic distribution in the system, it is possible to encode logical information either on the spin or on the charge degrees of freedom of the electron. Stirred by this fact, as well as by the experimental reports about hydrostatic pressure effects on semiconductor nanostructures, in this work we have analyzed some physical properties of in a two‐dimensional space.…”

Estados Energéticos De Una Impureza Bi-Hidrogenoide Confinada en Un Anillo Cuántico Semiconductor

“…Por esta razón, muchas investigaciones se han centrado en el estudio del espectro energético de diferentes tipos de estos sistemas hidrogenoides en QDs. En particular, el sistema bi-hidrogenoide D 2 + (Shuai et al, 2008;Gutiérrez et al, 2010), compuesto por dos donadoras (centros de carga fija de naturaleza positiva) que se ligan entre sí a través de un electrón, se ha venido estudiando en losúltimos años, ya que a través de una manipulación conveniente de sus propiedades moleculares, permitiría la obtención de un sistema de dos niveles de energía: "enlace" y "anti-enlace". Con estos dos niveles se podría codificar información cuánti-ca, bien sea a través del espín electrónico o a través del control de los grados de libertad del electrón.…”