Substrate-induced reduction of graphene thermal conductivity

Standard

Substrate-induced reduction of graphene thermal conductivity. / Koniakhin, S. V.; Utesov, O. I.; Terterov, I. N.; Nalitov, A. V.

In: Physical Review B, Vol. 95, No. 4, 045418, 23.01.2017.

Research output: Contribution to journal › Article › peer-review

Author

Koniakhin, S. V. ; Utesov, O. I. ; Terterov, I. N. ; Nalitov, A. V. / Substrate-induced reduction of graphene thermal conductivity. In: Physical Review B. 2017 ; Vol. 95, No. 4.

BibTeX

@article{5e54191683524cb3b1a7e2adc975ca61,

title = "Substrate-induced reduction of graphene thermal conductivity",

abstract = "We develop a theory of heat conductivity in supported graphene, accounting for coherent phonon scattering on disorder induced by an amorphous substrate. We derive spectra for in-plane and out-of-plane phonons in the framework of Green's function approach. The energy parameters of the theory are obtained using molecular dynamics simulations for graphene on a SiO2 substrate. The heat conductivity is calculated by the Boltzmann transport equation. We find that the interaction with the substrate drastically reduces the phonon lifetime and completely suppresses the contribution of flexural (ZA) phonons to the heat conductivity. As a result, the total heat conductivity is reduced by several times, which matches with the tendency observed in the available experimental data. The considered effect is important for managing the thermal properties of graphene-based electronic devices.",

author = "Koniakhin, {S. V.} and Utesov, {O. I.} and Terterov, {I. N.} and Nalitov, {A. V.}",

year = "2017",

month = jan,

day = "23",

doi = "10.1103/PhysRevB.95.045418",

language = "English",

volume = "95",

journal = "Physical Review B-Condensed Matter",

issn = "1098-0121",

publisher = "American Physical Society",

number = "4",

}

RIS

TY - JOUR

T1 - Substrate-induced reduction of graphene thermal conductivity

AU - Koniakhin, S. V.

AU - Utesov, O. I.

AU - Terterov, I. N.

AU - Nalitov, A. V.

PY - 2017/1/23

Y1 - 2017/1/23

N2 - We develop a theory of heat conductivity in supported graphene, accounting for coherent phonon scattering on disorder induced by an amorphous substrate. We derive spectra for in-plane and out-of-plane phonons in the framework of Green's function approach. The energy parameters of the theory are obtained using molecular dynamics simulations for graphene on a SiO2 substrate. The heat conductivity is calculated by the Boltzmann transport equation. We find that the interaction with the substrate drastically reduces the phonon lifetime and completely suppresses the contribution of flexural (ZA) phonons to the heat conductivity. As a result, the total heat conductivity is reduced by several times, which matches with the tendency observed in the available experimental data. The considered effect is important for managing the thermal properties of graphene-based electronic devices.

AB - We develop a theory of heat conductivity in supported graphene, accounting for coherent phonon scattering on disorder induced by an amorphous substrate. We derive spectra for in-plane and out-of-plane phonons in the framework of Green's function approach. The energy parameters of the theory are obtained using molecular dynamics simulations for graphene on a SiO2 substrate. The heat conductivity is calculated by the Boltzmann transport equation. We find that the interaction with the substrate drastically reduces the phonon lifetime and completely suppresses the contribution of flexural (ZA) phonons to the heat conductivity. As a result, the total heat conductivity is reduced by several times, which matches with the tendency observed in the available experimental data. The considered effect is important for managing the thermal properties of graphene-based electronic devices.

UR - http://www.scopus.com/inward/record.url?scp=85010749045&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.95.045418

DO - 10.1103/PhysRevB.95.045418

M3 - Article

AN - SCOPUS:85010749045

VL - 95

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 4

M1 - 045418

ER -

ID: 49950405