Controlling and enhancing terahertz collective electron dynamics in superlattices by chaos-assisted miniband transport

M. T. Greenaway, A. G. Balanov, E. Schöll, and T. M. Fromhold
Phys. Rev. B 80, 205318 – Published 18 November 2009

Abstract

We show that a tilted magnetic field transforms the structure and THz dynamics of charge domains in a biased semiconductor superlattice. At critical field values, strong coupling between the Bloch and cyclotron motion of a miniband electron triggers chaotic delocalization of the electron orbits, causing strong resonant enhancement of their drift velocity. This dramatically affects the collective electron behavior by inducing multiple propagating charge domains and GHz-THz current oscillations with frequencies ten times higher than with no tilted field.

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  • Received 16 October 2009

DOI:https://doi.org/10.1103/PhysRevB.80.205318

©2009 American Physical Society

Authors & Affiliations

M. T. Greenaway1, A. G. Balanov2, E. Schöll3, and T. M. Fromhold1

  • 1School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom
  • 2Department of Physics, Loughborough University, Leicestershire LE11 3TU, United Kingdom
  • 3Institut für Theoretische Physik, Technische Universität Berlin, 10623 Berlin, Germany

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Issue

Vol. 80, Iss. 20 — 15 November 2009

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