@Article{LeonPadillaTolSilSilLaR:2019:GfAnIn,
author = "Leon Padilla, Jhon Elber and Toloza Sandoval, Marcelo Alejandro
and Silva, Antonio Ferreira da and Silva, Erasmo
Assump{\c{c}}{\~a}o de Andrada e and La Rocca, Giuseppe Carlo",
affiliation = "{Universidade Federal da Bahia (UBA)} and {Universidade Federal da
Bahia (UBA)} and {Universidade Federal da Bahia (UBA)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Scuola
Normale Superiore and CNISM}",
title = "g-factor anisotropy inversion in InGaAs 2D nanostructures",
journal = "Physica Status Solidi B: Basic Research",
year = "2019",
volume = "256",
number = "6",
pages = "e1800643",
month = "June",
abstract = "he inversion or sign change of the electron g-factor anisotropy in
thin-layer semiconductor nanostructures is investigated
theoretically and gauged for InGaAs asymmetric single and double
quantum wells (QWs). The g-factor anisotropy in these 2D
nanostructures is given by the difference between the longitudinal
and transverse components; it is a fine sensor of the confining
potential and in InGaAs structures it is determined by the Rashba
spinorbit coupling. In the presence of structure inversion
asymmetry (SIA) the g-factor anisotropy is expected to invert at a
critical well width. This effect can be useful technologically and
is here analyzed in detail with InGaAs/InP asymmetric multi-layer
structures. The g-factor anisotropy in these structures is
calculated in a fine grid around the inversion point, using 8-band
kp Kane model based envelope function theory for the
nanostructure, and perturbation theory for the calculation of the
effective g factor. It is shown that the anisotropy inversion can
be seen only in asymmetric structures with very thin layers, near
the limit of no bound states allowed, and corresponding to the
electron being pushed out of the confining region. The inversion
point, or critical well width for the g-factor anisotropy
inversion in Insulator/InGaAs/InP QWs is determined to be
\≈4 nm. For double or coupled QWs it is found that the
inversion can be observed only with very thin tunneling barriers
around 1 nm wide.",
doi = "10.1002/pssb.201800643",
url = "http://dx.doi.org/10.1002/pssb.201800643",
issn = "0370-1972",
language = "en",
targetfile = "Padilla_et_al-2019-physica_status_solidi_(b).pdf",
urlaccessdate = "25 abr. 2024"
}