An atomistic Green’s function method is developed to simulate phonon transport across a strained germanium (or silicon) thin film between two semi-infinite silicon (or germanium) contacts. A plane-wave formulation is employed to handle the translational symmetry in directions parallel to the interfaces. The phonon transmission function and thermal conductance across the thin film are evaluated for various atomic configurations. The contributions from lattice straining and material heterogeneity are evaluated separately, and their relative magnitudes are characterized. The dependence of thermal conductance on film thickness is also calculated, verifying that the thermal conductance reaches an asymptotic value for very thick films. The thermal boundary resistance of a single interface is computed and agrees well with analytical model predictions. Multiple-interface effects on thermal resistance are investigated, and the results indicate that the first few interfaces have the most significant effect on the overall thermal resistance.
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Research Papers
Simulation of Interfacial Phonon Transport in Si–Ge Heterostructures Using an Atomistic Green’s Function Method
W. Zhang,
W. Zhang
School of Mechanical Engineering, Birck Nanotechnology Center,
Purdue University
, West Lafayette, IN 47907
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T. S. Fisher,
T. S. Fisher
School of Mechanical Engineering, Birck Nanotechnology Center,
e-mail: tsfisher@purdue.edu
Purdue University
, West Lafayette, IN 47907
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N. Mingo
N. Mingo
NASA-Ames Center for Nanotechnology
, 229-1, Moffett Field, CA 94035
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W. Zhang
School of Mechanical Engineering, Birck Nanotechnology Center,
Purdue University
, West Lafayette, IN 47907
T. S. Fisher
School of Mechanical Engineering, Birck Nanotechnology Center,
Purdue University
, West Lafayette, IN 47907e-mail: tsfisher@purdue.edu
N. Mingo
NASA-Ames Center for Nanotechnology
, 229-1, Moffett Field, CA 94035J. Heat Transfer. Apr 2007, 129(4): 483-491 (9 pages)
Published Online: May 30, 2006
Article history
Received:
December 15, 2005
Revised:
May 30, 2006
Citation
Zhang, W., Fisher, T. S., and Mingo, N. (May 30, 2006). "Simulation of Interfacial Phonon Transport in Si–Ge Heterostructures Using an Atomistic Green’s Function Method." ASME. J. Heat Transfer. April 2007; 129(4): 483–491. https://doi.org/10.1115/1.2709656
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