Thermoelectric properties of topological insulators based on π-stacked molecular and graphene-belt systems with hydrogen bonds

2018 5th Global Conference on Polymer and Composite Materials

材料科学;化学

Wierzbowska, M.^1

Institute of High Pressure Physics, Polish Academy of Sciences, Soko lowska 29/37, Warsaw

01-142, Poland^1

关键词: Benzene ring;    Crystalline insulators;    Interacting system;    Molecular networks;    Organic materials;    Planar structure;    Thermoelectric properties;    Topological insulators;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/369/1/012028/pdf
DOI  :  10.1088/1757-899X/369/1/012028

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Recently, new two-dimensional topological crystalline insulators were theoretically predicted in the family of molecular networks and graphene nanobelts. The planar structures are vertically stacked in columns formed via the π-type interactions between benzene rings. Moreover, the molecular or graphene-belt parts interact with each other via the hydrogen bonds, due to their termination with O and H. These organic materials possess flat band structures, which are characteristic for weakly interacting systems. As a consequence, the thermolectric power is high and excess that of graphene nearly four times.