@article{Mizoguchi2004-03Umkla-8854,
  year={2004},
  doi={10.1016/j.physe.2003.11.096},
  title={Umklapp process in observation of coherent folded longitudinal acoustic phonons in a GaAs/AlAs long-period superlattice},
  number={2-4},
  volume={21},
  issn={1386-9477},
  journal={Physica E: Low-dimensional Systems and Nanostructures},
  pages={646--650},
  author={Mizoguchi, Kohji and Hino, T. and Nakayama, Masaaki and Dekorsy, Thomas and Bartels, Albrecht and Kurz, Heinrich and Nakashima, S.}
}

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    <dc:creator>Bartels, Albrecht</dc:creator>
    <dcterms:abstract xml:lang="eng">Coherent folded longitudinal acoustic phonons in a GaAs/AlAs long-period superlattice (SL) have been investigated by using a reflection-type two-color pump probe technique under the condition that the wave vector of the probe pulse in the sample exceeds the mini-Brillouin zone. The coherent oscillations observed in the time-domain signals indicate the propagation of the phonon wave packet through the whole SL layer. The Fourier transform spectrum of the time-domain signals is compared with the dispersion relation of the folded longitudinal acoustic phonons in the long-period SL calculated using a transfer matrix method on the bases of an elastic continuum model. This comparison indicates that the folded longitudinal acoustic phonons in the long-period SL are observed through the umklapp process.</dcterms:abstract>
    <dc:creator>Hino, T.</dc:creator>
    <dc:creator>Nakashima, S.</dc:creator>
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    <dc:contributor>Kurz, Heinrich</dc:contributor>
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    <dc:creator>Kurz, Heinrich</dc:creator>
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    <dc:contributor>Bartels, Albrecht</dc:contributor>
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    <dcterms:bibliographicCitation>First publ. in: Physica E: Low-dimensional Systems and Nanostructures 21 (2004), 2/4, pp. 646-650</dcterms:bibliographicCitation>
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    <dc:contributor>Hino, T.</dc:contributor>
    <dc:contributor>Nakayama, Masaaki</dc:contributor>
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