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| 1 | Perspectives on exfoliated two-dimensional spintronics显示文摘Magnetic orderings, i.e., the spontaneous alignment of electron spins below a critical temperature, have been playing key roles in modern science and technologies for both the wide applications of magnetic recording for information storage and the vibrant potential of solid state electronic spin devices (also known as spintronics) for logic operations. In the past decades, thanks to the development of thin film technologies, magnetic thin films via sputtering or epitaxial growth have made the spintronic devices possible at the industrial scale. Yet thinner materials at lower costs with more versatile functionalities are highly desirable for advancing future spintronics. Recently, van der Waals magnetic materials, a family of magnets that can in principle be exfoliated down to the monolayer limit, seem to have brought tremendous opportunities: new generation van der Waals spintronic devices can be seamlessly assembled with possible applications such as optoelectronics, flexible electronics, and etc. Moreover, those exfoliated spintronic devices can potentially be compatible with the famed metal-oxide field effect transistor architectures, allowing the harness of spin performances through the knob of an electrostatic field. | Xiaoxi Li Baojuan Dong Xingdan Sun Hanwen Wang Teng Yang Guoqiang Yu Zheng Vitto Han | 2019 | Journal of Semiconductors2019，40，8： | 1 |
| 2 | On-demand assembly of optically levitated nanoparticle arrays in vacuum显示文摘Realizing a large-scale fully controllable quantum system is a challenging task in current physical research and has broad applications.In this work,we create a reconfigurable optically levitated nanoparticle array in vacuum.Our optically levitated nanoparticle array allows full control of individual nanoparticles to form an arbitrary pattern and detect their motion.As a concrete example,we choose two nanoparticles without rotation signals from an array to synthesize a nanodumbbell in situ by merging them into one trap.The nanodumbbell synthesized in situ can rotate beyond 1 GHz.Our work provides a platform for studying macroscopic many-body physics and quantum sensing. | JIANGWEI YAN XUDONG YU ZHENG VITTO HAN TONGCANG LI JING ZHANG | 2023 | Photonics Research2023，11，4： | 0 |
| 3 | Gate tunable spatial accumulation of valley-spin in chemical vapor deposition grown 40°-twisted bilayer WS2显示文摘The emerging two-dimensional materials,particularly transition metal dichalcogenides(TMDs),are known to exhibit valley degree of freedom with long valley lifetime,which hold great promises in the implementation of valleytronic devices.Especially,light-valley interactions have attracted attentions in these systems,as the electrical generation of valley magnetization can be readily achieved—a rather different route toward magnetoelectric(ME)effect as compared to that from conventional electron spins.However,so far,the moiré patterns constructed with twisted bilayer TMDs remain largely unexplored in regard of their valley spin polarizations,even though the symmetry might be distinct from the AB stacked bilayer TMDs.Here,we study the valley Hall effect(VHE)in 40°-twisted chemical vapor deposition(CVD)grown WS2moiré transistors,using optical Kerr rotation measurements at 20 K.We observe a clear gate tunable spatial distribution of the valley carrier imbalance induced by the VHE when a current is exerted in the system. | Siwen Zhao Gonglei Shao Zheng Vitto Han Song Liu Tongyao Zhang | 2023 | Journal of Semiconductors2023，44，1： | 0 |
| 4 | The emerging ferroic orderings in two dimensions显示文摘Because of the discovery of carbon atomic flatland, emerging physical phenomena are reported using the platform of two-dimensional materials and their hetero-structures. Especially, quantum orderings,such as superconductivity, ferromagnetism, and ferroelectricity in the atomically thin limit are cutting edge topics, which are of broad interest in the scope of condensed matter physics. In this study, we will recall the recent developments on two-dimensional ferroic orderings from both experimental and theoretical points of view. The booming of ferroic orderings in van der Waals two-dimensional materials are believed to hold promises for the next generation spin-or dipole-related nanoelectronics, because they can be seamlessly interfaced into heterostructures, and in principle are in line with large scale low-cost growth, flexible wearable devices, as well as semiconducting electronics thanks to the existence of band gaps in many of them. | Yupeng ZHANG Hanwen WANG Feng LI Xingdan SUN Baojuan DONG Xiaoxi LI Zheng Vitto HAN Teng YANG Han ZHANG | 2019 | Science China(Information Sciences)2019，62，12： | 0 |
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