样品名称 | 钽镍硒晶体Ta2NiSe5 |
性质 | 激子绝缘体 |
带隙 | <50 meV |
参数 | 尺寸:cm针状晶体 |
应用 | 半导体电子器件,传感器-探测器,非线性光学,STM-AFM实验,光学器件等研究 |
其他信息 | 详情请发邮件至:mknano@126.com |
钽镍硒晶体Ta2NiSe5照片:
Properties of Ta2NiSe5 crystals
Product Description
Ta2NiSe5 is a semimetal with exciton insulator transition at ~330K. Excitonic insulators are novel material systems exhibiting correlated electronic phases. Condensation of excitons to its ground state happens for a specific condition when the exciton binding energy (Eb) is larger than the band gap (Eg). The excitonic condensation in semiconductors occurs through a Bose-Einstein condensation process, while the condensation in semimetals occurs through the Bardeen-Cooper-Schrieffer (BCS) process. The spontaneous band hybridization caused by the Coulomb attraction between the orthogonal conduction (electron) and valence (hole) bands opens the bandgap and drives the system into the insulating state.