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Title: Resonance enhancement of electron-phonon interaction in nanostructures

The theory of electron-phonon interaction in quantum well is developed taking into account the influence of interface optical phonons. A detailed analysis of the dependence of polaron effective mass on the quantum well size and dielectric characteristics of barrier material is performed. It is shown that quasi-two-dimensional polaron may arise in narrow quantum wells. However, the interaction parameters are determined by effective mass of carriers in the quantum well and interface optical phonons frequencies. If the barriers are made of non-polar material, the polaron effective mass depends on the quantum well width. By increasing the quantum well width, a new mechanism of amplification of the electron-phonon interaction is realized. It occurs in the case of coincidence of the optical phonon energy with the energy of one of the electronic transitions. This leads to a nonmonotonic dependence of polaron effective mass on the quantum well width.
Authors:
;  [1]
  1. Ioffe Physical-Technical Institute of the Russian Academy of Sciences, Polytekhnicheskaya 26, Saint Petersburg 194021 (Russian Federation)
Publication Date:
OSTI Identifier:
22261796
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1566; Journal Issue: 1; Conference: ICPS 2012: 31. international conference on the physics of semiconductors, Zurich (Switzerland), 29 Jul - 3 Aug 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DIELECTRIC MATERIALS; EFFECTIVE MASS; ELECTRON-PHONON COUPLING; INTERACTIONS; PHONONS; QUANTUM WELLS