Effects of phonon interference through long range interatomic bonds on thermal interface conductance

• Published in: Физика низких температур
• Date: 2016
• Main Authors: Haoxue Han, Lei Feng, Shiyun Xiong, Takuma Shiga, Junichiro Shiomi, Volz, Sebastian, Kosevich, Yu.A.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2016
• Subjects: К 75-летию открытия теплового сопротивления Капицы
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/129285
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Effects of phonon interference through long range interatomic bonds on thermal interface conductance / Haoxue Han, Lei Feng, Shiyun Xiong, Takuma Shiga, Junichiro Shiomi, Sebastian Volz, Yuriy A. Kosevich // Физика низких температур. — 2016. — Т. 42, № 8. — С. 902-908. — Бібліогр.: 33 назв. — англ.

We investigate the role of two-path destructive phonon interference induced by interatomic bonds beyond the
 nearest neighbor in the thermal conductance of a silicon-germanium-like metasurface. Controlled by the ratio between
 the second and first nearest-neighbor harmonic force constants, the thermal conductance across a germanium
 atomic plane in the silicon lattice exhibits a trend switch induced by the destructive interference of the
 nearest-neighbor phonon path with a direct path bypassing the defect atoms. We show that bypassing of the
 heavy isotope impurity is crucial to the realization of the local minimum in the thermal conductance. We highlight
 the effect of the second phonon path on the distinct behaviors of the dependence of the thermal conductance
 on the impurity mass ratio. All our conclusions are confirmed both by Green’s Function calculations for the
 equivalent quasi-1D lattice models and by molecular dynamics simulations.