Effects of a Perpendicularly Applied Magnetic Field on Harmonically Driven Quasi-two-dimensional Electron Gas: the Static Macrostates Symmetry Breaking and Generation of Even Harmonics in System Output
Received 30 January 2021; accepted 01 June 2021
2021, Vol. 17, no. 2, pp. 141-156
Author(s): Maglevanny I. I., Smolar V. A., Karyakina T. I.
In this paper, we consider activation processes in a nonlinear metastable system based
on a quasi-two-dimensional superlattice and study the dynamics of such a system, which is
externally driven by a harmonic force in regimes of controlled instabilities. The spontaneous
transverse electric field is considered as an order parameter and the forced violations of the order
parameter are considered as a response of a system to periodic driving. The internal control
parameters are the longitudinal applied electric field, the sample temperature and the magnetic
field which is orthogonal to the superlattice plane. We investigate the cooperative effects of
self-organization and high harmonic forcing in such a system from the viewpoint of catastrophe
theory It is shown through numerical simulations that the additional magnetic field breaks the
static macrostates symmetry and leads to generation of even harmonics; it also allows the control
of the intensity of particular harmonics. The intensity of even harmonics demonstrates resonanttype
nonmonotonic dependence on control parameters with the maxima at points close to critical
points of the synergetic potential.
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