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Space-asymmetry-induced plasmon mode mixing and anticrossing in coupled bilayer structures

Hu, C. M. ; Schüller, Christian ; Heitmann, Detlef
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Date of publication of this fulltext: 25 Sep 2009 07:36


Abstract

We show that the space symmetry of bilayer systems, coupled by both tunneling and Coulomb interaction, has fundamental influences on the collective charge-density excitations. In the general case of two-subband occupation, three modes with one intersubband and two (optical and acoustic, respectively) intrasubband plasmons are calculated. By breaking the space symmetry, these modes are found to be ...

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