info:eu-repo/semantics/article
Coulomb and tunneling-coupled trilayer systems at zero magnetic field
Fecha
2016-02Registro en:
Miravet Martinez, Daniel; Proetto, Cesar Ramon; Bolcatto, Pablo Guillermo; Coulomb and tunneling-coupled trilayer systems at zero magnetic field; American Physical Society; Physical Review B; 93; 8; 2-2016; 085305
0163-1829
2469-9969
CONICET Digital
CONICET
Autor
Miravet Martinez, Daniel
Proetto, Cesar Ramon
Bolcatto, Pablo Guillermo
Resumen
The ground-state electronic configuration of three coupled bidimensional electron gases has been determined using a variational Hartree-Fock approach, at zero magnetic field. The layers are Coulomb coupled, and tunneling is present between neighboring layers. In the limit of small separation between layers, the tunneling becomes the dominant energy contribution, while for large distance between layers the physics is driven by the Hartree electrostatic energy. Transition from tunneling to Hartree dominated physics is shifted towards larger layer separation values as the total bidimensional density of the trilayers decreases. The interlayer exchange stabilizes a "balanced" configuration, where the three layers are approximately equally occupied; most of the experiments are performed in the vicinity of this balanced configuration. Several ground-state configurations are a consequence of a delicate interplay between tunneling and intersubband exchange.