The electronic structure of binary quasi-two-dimensional GeAs is investigated using first-principles calculations, and it is found that the anisotropic structure of the layered compound GeAs brings about the anisotrop...The electronic structure of binary quasi-two-dimensional GeAs is investigated using first-principles calculations, and it is found that the anisotropic structure of the layered compound GeAs brings about the anisotropy of the transport properties. Meanwhile, the band structure of GeAs exhibits a relatively large dispersion near the valence-band maximum in the Z –V direction while it is rather flat in the Z –Γ direction, which is highly desirable for good thermoelectric performance. The calculated partial charge density distribution also reveals that GeAs possesses anisotropic electrical conductivity. Based on the semi-classical Boltzmann transport theory, the anisotropic transport properties are observed, and the optimal doping concentrations are estimated. The temperature dependence transport properties of p-type GeAs are compared with the experimental data in good agreement, and the theoretical figure-of-merit ZT has been predicted as well.展开更多
2016年9月26日–Look beyond the Horizon GEA肉类加工新技术研讨会如期在北京皇家大饭店举办。本次研讨会从发出邀请之初就受到广大客户的热烈响应,参会的嘉宾超过180名,包括来自全国各地的肉类加工企业的高层领导、技术专家、行业内...2016年9月26日–Look beyond the Horizon GEA肉类加工新技术研讨会如期在北京皇家大饭店举办。本次研讨会从发出邀请之初就受到广大客户的热烈响应,参会的嘉宾超过180名,包括来自全国各地的肉类加工企业的高层领导、技术专家、行业内的权威专家等。上午8点30分,GEA工作人员热烈欢迎前来参会的嘉宾并在签名墙前合影留念。展开更多
基金Supported by the National Key Research and Development Program of China under Grant No 2016YFA0201001the National Natural Science Foundation of China under Grant No 11627801the Education Bureau of Hunan Province of China under Grant No 16C0626
文摘The electronic structure of binary quasi-two-dimensional GeAs is investigated using first-principles calculations, and it is found that the anisotropic structure of the layered compound GeAs brings about the anisotropy of the transport properties. Meanwhile, the band structure of GeAs exhibits a relatively large dispersion near the valence-band maximum in the Z –V direction while it is rather flat in the Z –Γ direction, which is highly desirable for good thermoelectric performance. The calculated partial charge density distribution also reveals that GeAs possesses anisotropic electrical conductivity. Based on the semi-classical Boltzmann transport theory, the anisotropic transport properties are observed, and the optimal doping concentrations are estimated. The temperature dependence transport properties of p-type GeAs are compared with the experimental data in good agreement, and the theoretical figure-of-merit ZT has been predicted as well.
文摘2016年9月26日–Look beyond the Horizon GEA肉类加工新技术研讨会如期在北京皇家大饭店举办。本次研讨会从发出邀请之初就受到广大客户的热烈响应,参会的嘉宾超过180名,包括来自全国各地的肉类加工企业的高层领导、技术专家、行业内的权威专家等。上午8点30分,GEA工作人员热烈欢迎前来参会的嘉宾并在签名墙前合影留念。
