二維材料的層間多能級(jí)作用

主 講 人 ：石興強(qiáng)    教授

活動(dòng)時(shí)間：12月08日10時(shí)00分    

地      點(diǎn) ：理科2號(hào)樓A308室

講座內(nèi)容：

Since the theoretical and experimental demonstration of the quasi-bonding (QB)interactions between van der Waals (vdW) layers of two-dimensional (2D) materials, diverse effects and applications of interlayer QB in vdW homo- and heterostructures have been reported. However, for vdW heterostructures (vdWHs)composed of magnetic and nonmagnetic 2D layers, the principles of interlayer QBinteraction in these systems and their potential application remain to beelucidated. Here, firstly, the spin-dependent and multilevel interlayer QB(namely, interlayer orbital hybridization) in a H-MoSe2/H-VSe2nonmagnetic/magnetic vdWH is established, and its multifunctional propertiesfor spintronics and spin-dependent optoelectronics are revealed. Then, we showthat the interlayer-multilevel-interaction nature is helpful for providing a unifiedunderstanding to the rich electronic-structure evolutions of 2D blackphosphorus under pressure. Finally, for MoS2, we find that theinterlayer-multilevel-interaction results in the significant asymmetricenergy-splitting between interlayer bonding and antibonding states of the valence band. The above works demonstrate the orbital-resolved multilevel analysis as a powerful tool for understanding the interlayer QB interactionsand help to reveal the underlying mechanism of interlayer-engineering for multifunctional applications of 2D materials

主講人介紹：

石興強(qiáng)，河北大學(xué)物理科學(xué)與技術(shù)學(xué)院教授，博士生導(dǎo)師。中國(guó)科學(xué)院固體物理研究所博士、香港城市大學(xué)物理及材料科學(xué)系博士后、德國(guó)不來(lái)梅大學(xué)計(jì)算材料科學(xué)研究中心Guest Scientist。長(zhǎng)期從事低維度體系及其表面和界面的計(jì)算研究，主要包括：分子電子學(xué)/自旋電子學(xué)、二維半導(dǎo)體及器件，以及儲(chǔ)能/催化等研究。已發(fā)表包括Phys. Rev. Lett.、J. Am. Chem. Soc.、Phys. Rev. B、J. Mater. Chem. A、Chem. Mater、New J. Phys. 等在內(nèi)的SCI論文100余篇。全部論文在近5年內(nèi)在他引1000多次（google scholar數(shù)據(jù)）。已經(jīng)主持完成了國(guó)家自然科學(xué)基金青年基金和面上項(xiàng)目各一項(xiàng)，作為核心成員參與一項(xiàng)國(guó)自然重點(diǎn)項(xiàng)目。兼任國(guó)際期刊《Scientific Reports》和《Journal of Semiconductors》的編委，兼任全國(guó)材料與器件科學(xué)家智庫(kù)委員、理事。

發(fā)布時(shí)間：2024-12-07 20:37:14