TITLE

Comment on “Nanoscale heat transfer in a thin aluminum film and femtosecond time-resolved electron diffraction” [Appl. Phys. Lett. 92, 011901 (2008)]

AUTHOR(S)
Nie, Shouhua; Wang, Xuan; Li, Junjie; Clinite, Richard; Cao, Jianming
PUB. DATE
April 2009
SOURCE
Applied Physics Letters;4/20/2009, Vol. 94 Issue 16, p166101
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In a recent letter [Appl. Phys. Lett. 92, 011901 (2008)], Tang reported a simulation of structural dynamics in metal films induced by ultrafast laser heating using the two-temperature model [P. B. Allen, Phys. Rev. Lett. 59, 1460 (1987) and R. W. Schoenlein et al., Phys. Rev. Lett. 58, 1680 (1987)] and one-dimensional anharmonic chain model [E. Fermi J. Pasta S. Ulam, No. LA-1940 (1955)]. In this comment, we would like to point out several issues in the physical concepts and formulations in the simulation which we strongly disagree with the author. Consequently, we believe that the main conclusion of Tang's paper that the interpretation of ultrafast diffraction data requires both nonlocal collective atomic motion and the conventional linear thermal expansion lacks physical justification and is questionable.
ACCESSION #
38225334

 

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