TY - JOUR
T1 - Phonon Transport in GaAs and InAs Twinning Superlattices
AU - López-Güell, Kim
AU - Forrer, Nicolas
AU - Cartoixà, Xavier
AU - Zardo, Ilaria
AU - Rurali, Riccardo
N1 - Publisher Copyright:
© 2022 American Chemical Society.
PY - 2022/10/6
Y1 - 2022/10/6
N2 - Crystal phase engineering gives access to new types of periodic nanostructures, such as the so-called twinning superlattices, where the motif of the superlattice is determined by a periodic rotation of the crystal. Here, by means of atomistic nonequilibrium molecular dynamics calculations, we study to what extent these periodic systems can be used to alter phonon transport in a controlled way, similar to what has been predicted and observed in conventional superlattices based on heterointerfaces. We focus on twinning superlattices in GaAs and InAs and highlight the existence of two different transport regimes: in one, each interface behaves like an independent scatterer; in the other, a segment with a sufficiently large number of closely spaced interfaces is seen by propagating phonons as a metamaterial with its own thermal properties. In this second scenario, we distinguish the case where the phonon mean free path is smaller or larger than the superlattice segment, pointing out a different dependence of the thermal resistance with the number of interfaces.
AB - Crystal phase engineering gives access to new types of periodic nanostructures, such as the so-called twinning superlattices, where the motif of the superlattice is determined by a periodic rotation of the crystal. Here, by means of atomistic nonequilibrium molecular dynamics calculations, we study to what extent these periodic systems can be used to alter phonon transport in a controlled way, similar to what has been predicted and observed in conventional superlattices based on heterointerfaces. We focus on twinning superlattices in GaAs and InAs and highlight the existence of two different transport regimes: in one, each interface behaves like an independent scatterer; in the other, a segment with a sufficiently large number of closely spaced interfaces is seen by propagating phonons as a metamaterial with its own thermal properties. In this second scenario, we distinguish the case where the phonon mean free path is smaller or larger than the superlattice segment, pointing out a different dependence of the thermal resistance with the number of interfaces.
UR - http://www.scopus.com/inward/record.url?scp=85138887762&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.2c04859
DO - 10.1021/acs.jpcc.2c04859
M3 - Article
AN - SCOPUS:85138887762
SN - 1932-7447
VL - 126
SP - 16851
EP - 16858
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 39
ER -