Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-02-11
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
10 pages. Submitted to: J.Phys. : Condens. Matter
Scientific paper
Applying the method of characteristics leads to wavefunctions and dynamic localization conditions for electrons on the one dimensional lattice under perpendicular time dependent electric and magnetic fields. Such conditions proceed again in terms of sums of products of Bessel functions of the first kind. However, this time one deals with both the number of magnetic flux quanta times $\pi $ and the quotients between the Bloch frequency and the ones characterizing competing fields. Tuning the phases of time dependent modulations leads to interesting frequency mixing effects providing an appreciable simplification of dynamic localization conditions one looks for. The understanding is that proceeding in this manner, the time dependent superposition mentioned above gets reduced effectively to the influence of individual ac-fields exhibiting mixed frequency quotients. Besides pure field limits and superpositions between uniform electric and time dependent magnetic fields, parity and periodicity effects have also been discussed.
Aur L.
Micu C.
Papp E.
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