Unraveling the Peculiarities in the Temperature-Dependent Structural Evolution of Black Phosphorus

Condensed Matter

Joseph, Boby¹ 

关键词: two-dimensional systems;    black phosphorus;    x-ray powder diffraction;    transport properties;   

DOI  :  10.3390/condmat2010011

学科分类：凝聚态物理

来源: mdpi

【 摘 要 】

Black phosphorous (BP) is one of the important emerging two-dimensional systems. We have undertaken a structural investigation of BP in the temperature range of 320 K to 85 K using synchrotron X-ray diffraction (XRD) studies. The XRD pattern of BP is heavily influenced by the preferred orientation effects. Collection of the diffraction pattern in a standard capillary geometry with controlled capillary rotations perpendicular to the X-ray direction permitted us to provide insights to the effects of the preferred orientation. In the range of 320 K to 85 K, BP remains in the so-called “A17” orthorhombic structure. Lattice parameters show a regular shrinkage with the lowering of the temperature as expected for any elemental metallic system. Dense temperature sampling permitted us to observe a small but clear deviation from the linear behavior in of one of the in-plane lattice parameters. This temperature-dependent structural evolution seems to provide some insights into the temperature dependence of the macroscopic properties of BP such as the Hall coefficient, thermal conductivity, etc.

【 授权许可】

CC BY