1. Control of the dipole domain propagation in a GaAs/AlAs superlattice with a high-frequency field
- Author
-
Yu. Koschurinov, Andreas Amann, A.-K. Jappsen, Eckehard Schöll, Andreas Wacker, K. Hofbeck, R. Scheuerer, M. Haeussler, Ekkehard Schomburg, Karl Friedrich Renk, and D.G. Pavel'ev
- Subjects
Physics ,Rational number ,Field (physics) ,Condensed matter physics ,Superlattice ,Doping ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Cathode ,law.invention ,Condensed Matter::Materials Science ,Dipole ,law ,Quasiperiodic function ,Domain (ring theory) - Abstract
We observed that the propagation of a dipole domain in a GaAs/AlAs superlattice can be controlled by an external high-frequency field. The doped GaAs/AlAs superlattice showed a negative differential conductance giving rise to propagating dipole domains. Depending on the frequency of the high-frequency field, either frequency-locked or quasiperiodic propagating domain states occurred. The behavior can be described by a ``devil's staircase,'' where in the locked state the ratio of the external frequency and the domain transit frequency is a rational number. A theoretical analysis indicates that the high-frequency field controls the domain propagation by a modification of both the domain velocity and the shedding of the domains from the cathode.
- Published
- 2002