TY - JOUR
T1 - Phonon heat transport in two-dimensional phagraphene-graphene superlattice
AU - Farzadian, O.
AU - Yousefi, F.
AU - Spitas, C.
AU - Kostas, K. V.
N1 - Funding Information:
This work has been funded by the Nazarbayev University Collaborative Research Project (CRP): “Development of smart passive-active multiscale composite structure for earth Remote Sensing Satellites (RSS) of ultrahigh resolution (ULTRASAT)”, Grant Award Nr. 091019CRP2115 .
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/1
Y1 - 2022/1
N2 - In this study, we perform non-equilibrium molecular dynamics simulations to investigate phonon heat transport in a two-dimensional superlattice with equal-sized domains of graphene and phagraphene. Effects on conductivity are examined in relation to modifications of domain sizes, the length of employed nanoribbons and temperature differences between the thermal baths used with the superlattices. We have determined that effective thermal conductivity reaches a minimum value of 155W/mK for ribbons with a superlattice period of 12.85nm. This minimum thermal conductivity of graphene-phagraphene superlattices at infinite length is approximately 5%, of pure graphene thermal conductivity, and ≈50% of phagraphene thermal conductivity. Minimum thermal conductivity occurs at the transition from coherent to incoherent phonon transport, where the superlattice period is comparable to the phonon coherence length.
AB - In this study, we perform non-equilibrium molecular dynamics simulations to investigate phonon heat transport in a two-dimensional superlattice with equal-sized domains of graphene and phagraphene. Effects on conductivity are examined in relation to modifications of domain sizes, the length of employed nanoribbons and temperature differences between the thermal baths used with the superlattices. We have determined that effective thermal conductivity reaches a minimum value of 155W/mK for ribbons with a superlattice period of 12.85nm. This minimum thermal conductivity of graphene-phagraphene superlattices at infinite length is approximately 5%, of pure graphene thermal conductivity, and ≈50% of phagraphene thermal conductivity. Minimum thermal conductivity occurs at the transition from coherent to incoherent phonon transport, where the superlattice period is comparable to the phonon coherence length.
KW - heat transport
KW - kapitza resistance
KW - molecular dynamics
KW - Phagraphene
KW - superlattices
KW - thermal conductivity
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U2 - 10.1016/j.ijheatmasstransfer.2021.121917
DO - 10.1016/j.ijheatmasstransfer.2021.121917
M3 - Article
AN - SCOPUS:85114680812
SN - 0017-9310
VL - 182
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
M1 - 121917
ER -