New collective modes in wide quantum wells with in-plane magnetic fields

Shun-Jen Cheng*, Rolf R. Gerhardts

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


The collective excitations of symmetric wide quantum wells under in-plane magnetic fields were investigated using random phase approximation (RPA) method. A high in-plane magnetic field induces an additional branch of undamped acoustic-like plasmons, which does not exist in single quantum wells without in-plane magnetic fields. It is found that the in-plane magnetic field affects the frequencies, (an-)isotropy and types of the plasmon modes.

Original languageEnglish
Pages (from-to)554-557
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1-4
StatePublished - 1 Jan 2002
Event14th International Conference on the - Prague, Czech Republic
Duration: 30 Jul 20013 Aug 2001


  • Collective excitations
  • In-plane magnetic fields
  • Plasmons
  • Quantum wells

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