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CrI3高压相变及其光学性质理论研究
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作者 张丽琴 袁五届 +1 位作者 张金峰 徐士涛 《原子与分子物理学报》 CAS 北大核心 2019年第5期811-817,共7页
利用第一性原理计算方法,探讨了体相CrI3在低温斜方六面体结构(R3-,BiI3-type)及高压单斜结构(C2/m,AlCl3-type)的相变、电子结构和光学性质.计算结果显示,半导体CrI3当压强增加到26.1GPa时,高压导致的晶格畸变致使CrI3从相R3-变化到相C... 利用第一性原理计算方法,探讨了体相CrI3在低温斜方六面体结构(R3-,BiI3-type)及高压单斜结构(C2/m,AlCl3-type)的相变、电子结构和光学性质.计算结果显示,半导体CrI3当压强增加到26.1GPa时,高压导致的晶格畸变致使CrI3从相R3-变化到相C2/m;原子之间的错位位移,使导带处的能带发生下移,价带处的能带发生了一定程度的上移,导致带隙减小.两种相的光学性质进一步验证了这些特性. 展开更多
关键词 CrI3 第一性原理 相变 光学性质
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Study Under AC Stimulation on Excitement Properties of Weighted Small-World Biological Neural Networks with Side-Restrain Mechanism 被引量:1
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作者 yuan wu-jie LUO Xiao-Shu JIANG Pin-Qun 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第2期369-373,共5页
In this paper, we propose a new model of weighted small-world biological neural networks based on biophysical Hodgkin-Huxley neurons with side-restrain mechanism. Then we study excitement properties of the model under... In this paper, we propose a new model of weighted small-world biological neural networks based on biophysical Hodgkin-Huxley neurons with side-restrain mechanism. Then we study excitement properties of the model under alternating current (AC) stimulation. The study shows that the excitement properties in the networks are preferably consistent with the behavior properties of a brain nervous system under different AC stimuli, such as refractory period and the brain neural excitement response induced by different intensities of noise and coupling. The results of the study have reference worthiness for the brain nerve electrophysiology and epistemological science. 展开更多
关键词 small-world networks biological neural networks side-restrain mechanism Hodgkin-Huxley equations
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