5 papers · 1 filter
Quantum dots based on spin properties of semiconductor heterostructures
M. Valin-Rodriguez, A. Puente, L. Serra
The possibility of a novel type of semiconductor quantum dots obtained by spatially modulating the spin-orbit coupling intensity in III-V heterostructures is discussed. Using the e…
Roto-vibrational spectrum and Wigner crystallization in two-electron parabolic quantum dots
Antonio Puente, Llorens Serra, Rashid G. Nazmitdinov
We provide a quantitative determination of the crystallization onset for two electrons in a parabolic two-dimensional confinement. This system is shown to be well described by a ro…
Spin splitting and precession in quantum dots with spin-orbit coupling: the role of spatial deformation
Manuel Valin-Rodriguez, Antonio Puente, Llorens Serra
Extending a previous work on spin precession in GaAs/AlGaAs quantum dots with spin-orbit coupling, we study the role of deformation in the external confinement. Small elliptical de…
Electron spin precession in semiconductor quantum wires with Rashba spin-orbit coupling
Manuel Valin-Rodriguez, Antonio Puente, Llorens Serra
The influence of the Rashba spin-orbit coupling on the electron spin dynamics is investigated for a ballistic semiconductor quantum wire with a finite width. We monitor the spin ev…
Symmetry breaking and the random-phase approximation in small quantum dots
Llorens Serra, Rashid G. Nazmitdinov, A. Puente
The random-phase approximation has been used to compute the properties of parabolic two-dimensional quantum dots beyond the mean-field approximation. Special emphasis is put on the…