TY - GEN
T1 - Heat confinement of phase-change memory using graphene
AU - Chen, Liang
AU - Xue, Rong
AU - Chen, Shuangtao
AU - Hou, Yu
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/7/25
Y1 - 2017/7/25
N2 - Reducing the heat loss is a key pathway for advancing phase change memory (PCM) technology because a good thermal confinement can facilitate the fast phase transition and reduce the programing power. In this study, the thermal boundary resistance between graphene and tungsten electrode heater is investigated. Density junctional theory (DFT) and atomistic Green's function (AGF) based approach is employed to explore the interfacial phonon transport across the graphene-electrode interfaces. Interfacial structure is optimized using DFT calculations, and the interaction between graphene/electrode is analyzed based on the electronic structure and cohesive energy. Phonon coupling at the graphene/electrode interface is studied through the analysis of phonon dispersion relations and phonon density of states. The AGF results show that the phonon transmission is limited to 4 THz depending on the phonon spectrum in tungsten and a thermal boundary resistance of 21.3 m2K/GW is obtained at physisorption interface between single layer graphene and tungsten. This study will provide insights to understand the thermal transport mechanism in PCM and guidelines to engineer the interfaces for better thermal confinement.
AB - Reducing the heat loss is a key pathway for advancing phase change memory (PCM) technology because a good thermal confinement can facilitate the fast phase transition and reduce the programing power. In this study, the thermal boundary resistance between graphene and tungsten electrode heater is investigated. Density junctional theory (DFT) and atomistic Green's function (AGF) based approach is employed to explore the interfacial phonon transport across the graphene-electrode interfaces. Interfacial structure is optimized using DFT calculations, and the interaction between graphene/electrode is analyzed based on the electronic structure and cohesive energy. Phonon coupling at the graphene/electrode interface is studied through the analysis of phonon dispersion relations and phonon density of states. The AGF results show that the phonon transmission is limited to 4 THz depending on the phonon spectrum in tungsten and a thermal boundary resistance of 21.3 m2K/GW is obtained at physisorption interface between single layer graphene and tungsten. This study will provide insights to understand the thermal transport mechanism in PCM and guidelines to engineer the interfaces for better thermal confinement.
KW - Atomistic Green's function
KW - Density functional theory
KW - Thermal boundary conductance
KW - Tungsten
UR - https://www.scopus.com/pages/publications/85034416409
U2 - 10.1109/ITHERM.2017.7992465
DO - 10.1109/ITHERM.2017.7992465
M3 - 会议稿件
AN - SCOPUS:85034416409
T3 - Proceedings of the 16th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2017
SP - 149
EP - 154
BT - Proceedings of the 16th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 16th IEEE InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2017
Y2 - 30 May 2017 through 2 June 2017
ER -