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Long-wavelength nonpolar phonons in semiconductor heterostructures

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Abstract.

Employing a phenomenological long-wavelength approach recently developed, both acoustic and optical phonons in nonpolar heterostructures are studied. Phonon modes in an arbitrary direction can be calculated without additional effort respect to high symmetry directions. A simple analytical expression for the dispersion relation in superlattices guides the physical discussion. We apply this to the calculation of phonon modes in unstrained short period isotopic Ge superlattices, in quantum wells and in strained short period Si/Ge superlattices. We find very good agreement with the results of other, more elaborated and costly calculations.

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Authors and Affiliations

  1. Institut für Theoretische Physik III, Universität Stuttgart, Pfaffenwaldring 57, 70550, Stuttgart, Germany

    F. de León-Pérez

  2. Physics Faculty, Havana University, 10400, Havana, Cuba

    R. Pérez-Alvarez

Authors
  1. F. de León-Pérez
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  2. R. Pérez-Alvarez
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Correspondence to F. de León-Pérez.

Additional information

Received: 21 July 2004, Published online: 5 November 2004

PACS:

63.20.Dj Phonon states and bands, normal modes, and phonon dispersion - 63.22. + m Phonons or vibrational states in low-dimensional structures and nanoscale materials - 68.65.Cd Superlattices

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de León-Pérez, F., Pérez-Alvarez, R. Long-wavelength nonpolar phonons in semiconductor heterostructures. Eur. Phys. J. B 41, 451–456 (2004). https://doi.org/10.1140/epjb/e2004-00338-y

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  • DOI: https://doi.org/10.1140/epjb/e2004-00338-y

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