We report on time-domain thermoreflectance measurements of cross-plane thermal conductivity of In0.63Ga0.37As/In0.37Al0.63As superlattices with interface densities ranging from 0.0374 to 2.19 nm−1 in the temperature range 80–295 K. The measurements are complemented by a three-dimensional finite-difference time-domain solution to the elastic wave equation, in which the rms roughness and correlation length at heterointerfaces are varied, and the parameters yielding best agreement with experiment are determined using machine learning. Both experimental measurements and simulations demonstrate the existence of a minimum in the cross-plane thermal conductivity as a function of interface density, which is evidence of a crossover from incoherent to coherent phonon transport as the interface density increases. This minimum persists with increasing temperature, indicating the continued dominance of the temperature-independent interface and alloy-disorder scattering over the temperature-dependent three-phonon scattering in thermal transport through III–V alloy superlattices.
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Incoherent-to-coherent crossover in thermal transport through III–V alloy superlattices
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5 December 2022
Research Article|
December 07 2022
Incoherent-to-coherent crossover in thermal transport through III–V alloy superlattices
Special Collection:
Phononics of Graphene, Layered Materials, and Heterostructures
C. Perez
;
C. Perez
(Conceptualization, Formal analysis, Investigation, Methodology, Writing – original draft, Writing – review & editing)
1
Department of Mechanical Engineering, The Pennsylvania State University
, University Park, Pennsylvania 16802, USA
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L. Avazpour
;
L. Avazpour
(Conceptualization, Formal analysis, Writing – original draft, Writing – review & editing)
2
Department of Electrical & Computer Engineering, University of Wisconsin-Madison
, Madison, Wisconsin 53706, USA
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M. K. Eryilmaz;
M. K. Eryilmaz
(Formal analysis, Writing – original draft, Writing – review & editing)
2
Department of Electrical & Computer Engineering, University of Wisconsin-Madison
, Madison, Wisconsin 53706, USA
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T. Earles;
T. Earles
(Investigation, Resources, Writing – original draft, Writing – review & editing)
3
DRS Daylight Solutions
, Madison, Wisconsin 53704, USA
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S. Ruder;
S. Ruder
(Investigation, Resources, Writing – original draft, Writing – review & editing)
3
DRS Daylight Solutions
, Madison, Wisconsin 53704, USA
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V. Gopalan
;
V. Gopalan
(Investigation, Supervision, Writing – original draft, Writing – review & editing)
4
Department of Materials Science & Engineering, The Pennsylvania State University
, University Park, Pennsylvania 16802, USA
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D. Botez
;
D. Botez
(Investigation, Supervision, Writing – original draft, Writing – review & editing)
2
Department of Electrical & Computer Engineering, University of Wisconsin-Madison
, Madison, Wisconsin 53706, USA
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I. Knezevic
;
I. Knezevic
(Conceptualization, Formal analysis, Methodology, Supervision, Writing – original draft, Writing – review & editing)
2
Department of Electrical & Computer Engineering, University of Wisconsin-Madison
, Madison, Wisconsin 53706, USA
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B. Ramos-Alvarado
;
B. Ramos-Alvarado
(Conceptualization, Project administration, Supervision, Writing – original draft, Writing – review & editing)
1
Department of Mechanical Engineering, The Pennsylvania State University
, University Park, Pennsylvania 16802, USA
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B. M. Foley;
B. M. Foley
(Conceptualization, Formal analysis, Investigation, Supervision, Writing – original draft, Writing – review & editing)
5
Laser Thermal
, Charlottesville, Virginia 22902, USA
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L. J. Mawst
L. J. Mawst
a)
(Conceptualization, Investigation, Methodology, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing)
2
Department of Electrical & Computer Engineering, University of Wisconsin-Madison
, Madison, Wisconsin 53706, USA
a)Author to whom correspondence should be addressed: ljmawst@wisc.edu
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a)Author to whom correspondence should be addressed: ljmawst@wisc.edu
Note: This paper is part of the APL Special Collection on Phononics of Graphene, Layered Materials, and Heterostructures.
Appl. Phys. Lett. 121, 232201 (2022)
Article history
Received:
August 31 2022
Accepted:
November 23 2022
Citation
C. Perez, L. Avazpour, M. K. Eryilmaz, T. Earles, S. Ruder, V. Gopalan, D. Botez, I. Knezevic, B. Ramos-Alvarado, B. M. Foley, L. J. Mawst; Incoherent-to-coherent crossover in thermal transport through III–V alloy superlattices. Appl. Phys. Lett. 5 December 2022; 121 (23): 232201. https://doi.org/10.1063/5.0123711
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