Abstract
We report on experimental evidences that identify more clearly the piezoelectric origin of chaotic acoustoelectric voltage oscillations observed in ndashInSb in a transverse magnetic field at 77 K. Measurements of the threshold current for chaotic behaviour showed that oscillations are reduced in amplitude when large DC currents driving the chaos are injected in a direction perpendicular to the [1 1 1] piezoelectric orientation as expected. The threshold current density for both nonlinear and chaotic behaviour is seen to decrease with the magnitude of the transverse magnetic field. Furthermore, we observed that the chaotic threshold current density saturates at high field towards a value consistent with the zero field threshold for a nonlinear acoustoelectric instability. This behaviour can be surprisingly interpreted with a linear model of the acoustic wave gain used to explain sound amplification and domain formation in Insb along a piezoelectric direction.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
