Magnetoelectric phenomena in nanoelectronics

Tunnelling through Oscillating Barrier

“…Photo-stimulated tunnelling for quantum computation A quantum bit (qubit = twolevel quantum system) can be implemented in two different space states [14], in particular, in two quantum dots. The possible states of the system are whether an electron is placed in one quantum dot or in another.…”

Magneto-gyrotropic photogalvanic effects in semiconductor quantum wells

“…The experiments on the MPGE under direct optical transitions observed in asymmetric QW structures are interpreted in terms of the asymmetric spin-independent electron energy dispersion, ε(k, B) = ε(−k, B), analysed by Gorbatsevich et al [16]; see also [17,18]. The simplest contribution to the electron effective Hamiltonian representing such a kind of asymmetric dispersion is the diamagnetic term H…”

“…Photocurrents which require simultaneously gyrotropy and the presence of a magnetic field may be gathered in a class of magneto-optical phenomena denoted as magneto-gyrotropic photogalvanic effects. So far such currents have been intensively studied in low-dimensional structures at direct interband and inter-subband transitions [15][16][17][18][19][20][21][22]. In these investigations the magneto-induced photocurrents were related to spin-independent mechanisms, except for [15,20], where direct optical transitions between branches of the spin-split electron subband were considered.…”

Magnetoelectricity

“…As discussed by Gorbatsevich et al (1994), mentioned phenomena lead to the appearance of an induced electric dipole, which is magnetoelectricity.…”