Can I read Thermal diffusivity and its lower bound in orthorhombic SnSe on EtoBox?

Thermal diffusivity and its lower bound in orthorhombic SnSe by Martelli, Valentina; Abud, Fabio; Jiménez, Julio Larrea; Baggio-Saitovich, Elisa; Zhao, Li-Dong; Behnia, Kamran is a scholarly article available to read on EtoBox.

What is Thermal diffusivity and its lower bound in orthorhombic SnSe about?

The orthorhombic monochalcogenide SnSe has attracted much attention in recent years as a promising high-temperature thermoelectric material. We present a study of its thermal conductivity and specific heat of SnSe between 2~K and 300~K and quantify its anisotropic thermal diffusivity, $D$. For both crystallographic orientations, thermal diffusivity remains above the recently identified Planckian limit ($D > v_s^2 \tau_P$, where $v_s$ is the sound velocity and $\tau_P= \hbar/k_BT$) and its anisotropy in $D$ is set by the anisotropy of $v_s$. Comparison with cubic members of the IV-VI family leads to a consistent picture, where the diffusivity in all members of the family is set by the product of v$_s$, $\tau_P$ and the 'melting' velocity derived from the melting temperature.

Author

Martelli, Valentina; Abud, Fabio; Jiménez, Julio Larrea; Baggio-Saitovich, Elisa; Zhao, Li-Dong; Behnia, Kamran

Published

2021

Language

EN