When modeling heat transfer in nanoribbons, an unusually sharp dependence of the heat flux, and, consequently, the thermal conductivity coefficient, on the degree of specularity of phonon reflection from the lateral boundaries was found. From numerical calculations, it followed that the addition of minimally diffuse scattering should lead to an abrupt increase in the thermal resistance of the conductor. Given the importance of selecting optimal thermal parameters in nanotechnology, this short paper provides an analysis of the found dependencies, discusses the physical reasons for this anomalous behavior, and draws conclusions about the importance of achieving the quality of the nanoconductor interface to create thermal contacts with a given or optimal thermal conductivity.

1.
J.
Amrit
,
K.
Nemchenko
, and
T.
Vikhtinskaya
, “
Effect of diffuse phonon boundary scattering on heat flow
,”
J. Appl. Phys.
129
,
085105
(
2021
).
2.
J.
Amrit
,
T.
Medintseva
,
Y
.
Nemchenko
,
K.
Nemchenko
,
M.
Spotar
,
S.
Rogova
, and
T.
Vikhtinskaya
, “
Analytical description of phonon heat flow with diffusive boundary scattering
,”
Fiz. Nizk. Temp.
49
,
1056
(
2023
) [Low Temp. Phys. 49, 961 (2023)].
3.
H. B. G.
Casimir
, “
Note on the conduction of heat in crysals
,”
Physica
5
,
495
(
1938
).
4.
J. M.
Ziman
,
Electrons and Phonons: The Theory of Transport Phenomena in Solids
(
Oxford University Press
,
Oxford
,
2001
).
5.
J.
Amrit
,
T.
Medintseva
,
K.
Nemchenko
, and
T.
Vikhtinskaya
, “
Probabilistic description for quasiparticle heat transport in one-dimensional nanostructures
,”
J. Appl. Phys.
131
,
244302
(
2022
).
You do not currently have access to this content.