Donor impurity states in elliptical quantum rings subjected to a magnetic field

Effects of Geometry on the Electronic Properties of Semiconductor Elliptical Quantum Rings

“…A special use for THz range devices is the detection of explosives at a distance, since the substances that usually compose them have a response at those frequencies 35 . In addition, some studies related to impurities in two dimensional elliptical quantum rings have been carried out focusing on their influence on persistent current features 10,36,37 .…”

“…Despite the advances achieved in growth techniques such as molecular beam epitaxy and metal chemical vapor deposition, that have allowed to fabricate QRs with geometries close to the circular one -which have been studied by many groups in recent years 8 – 16 , the actual rings do have a more complex structure due to the presence of impurities and, more importantly, geometrical imperfections 10 , 17 , 18 . For instance, the deviations from the ideal toric-shape can be observed from AFM images of QRs obtained via droplet epitaxy 19 , 20 .…”

Controlling the magnetic susceptibility in an artificial elliptical quantum ring by magnetic flux and external Rashba effect

“…[11][12][13][14][15][16][17][18][19][20][21] The quantum interferences are affected by the symmetry of the structure which is disturbed by the disorder. [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] For instance, Maiti has studied the sign of the currents in a one-dimensional (1D) quantum ring in the presence of impurity. 38 He found that the sign of the currents strongly depends on the total number of electrons and also on the disordered configurations of these systems.…”