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6CCVD Research

High-pressure phases of boron arsenide with potential high thermal conductivity

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2019-05-10
JournalPhysical review. B./Physical review. B
AuthorsLinyan Wang, Fei Tian, Xiaowei Liang, Yuhao Fu, Xufeng Mu
InstitutionsJilin University, University of Houston
Citations24

Abstract

Section titled ā€œAbstractā€

Zinc-blende (zb) boron arsenide (BAs) has been confirmed to have impressively high thermal conductivity. However, studies on its phase transitions under pressure have been few. Here, through a recently developed structure search method, we predicted that many polytypes with the structural features of cubic and hexagonal diamond, which are known to be unstable even up to very high pressures for carbon and boron nitride, can become stable at low pressures and might be retained to ambient conditions. Moreover, some of these BAs polytypes are calculated to have impressively high thermal conductivities at ambient conditions and the thermal conductivities for zb- and $2H$-BAs will decrease with increasing pressure, which are mainly attributed to the stronger third anharmonic interaction. The current study will open up a route to the search for high thermal conductors.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2011 - Fundamentals of Heat and Mass Transfer

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