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Tunneling time for phonons: dependence on the system's size
Author(s) -
Villegas Diosdado,
de LeónPérez Fernando,
PérezAlvarez Rolando
Publication year - 2005
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200461724
Subject(s) - phonon , quantum tunnelling , condensed matter physics , semiconductor , saturation (graph theory) , heterojunction , electron , wavelength , physics , optoelectronics , quantum mechanics , mathematics , combinatorics
We discuss the physical conditions under which the tunneling time for long‐wavelength phonons through semiconductor heterostructures is independent of the system's size, i.e. the effect equivalent to the Hartman effect for electrons. An analysis of the vibrational energy stored in the system is shown to be relevant for this study. In fact, the phonon Hartman effect is explained on the basis of saturation of the stored vibrational energy. Both acoustic and optical phonons are considered. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)