Phys. Rev. B 78, 165111 (2008) [5 pages]Inelastic scattering from local vibrational modesReceived 12 September 2008; published 13 October 2008 We study a nonuniversal contribution to the dephasing rate of conduction electrons due to local vibrational modes. The inelastic-scattering rate is strongly influenced by multiphonon excitations, exhibiting oscillatory behavior. For higher frequencies, it saturates to a finite, coupling dependent value. In the strong-coupling limit, the phonon is almost completely softened and the inelastic cross section reaches its maximal value. This represents a magnetic-field insensitive contribution to the dephasing time in mesoscopic systems, in addition to magnetic impurities. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.78.165111
DOI:
10.1103/PhysRevB.78.165111
PACS:
73.23.−b, 72.10.Fk, 73.63.−b
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