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911.
Yan Zhang Keisuke Shinokita Kenji Watanabe Takashi Taniguchi Masato Goto Daisuke Kan Yuichi Shimakawa Yutaka Moritomo Taishi Nishihara Yuhei Miyauchi Kazunari Matsuda 《Advanced materials (Deerfield Beach, Fla.)》2020,32(50):2003501
Optically generated excitonic states (excitons and trions) in transition metal dichalcogenides are highly sensitive to the electronic and magnetic properties of the materials underneath. Modulation and control of the excitonic states in a novel van der Waals (vdW) heterostructure of monolayer MoSe2 on double-layered perovskite Mn oxide ((La0.8Nd0.2)1.2Sr1.8Mn2O7) is demonstrated, wherein the Mn oxide transforms from a paramagnetic insulator to a ferromagnetic metal. A discontinuous change in the exciton photoluminescence intensity via dielectric screening is observed. Further, a relatively high trion intensity is discovered due to the charge transfer from metallic Mn oxide under the Curie temperature. Moreover, the vdW heterostructures with an ultrathin h-BN spacer layer demonstrate enhanced valley splitting and polarization of excitonic states due to the proximity effect of the ferromagnetic spins of Mn oxide. The controllable h-BN thickness in vdW heterostructures reveals a several-nanometer-long scale of charge transfer as well as a magnetic proximity effect. The vdW heterostructure allows modulation and control of the excitonic states via dielectric screening, charge carriers, and magnetic spins. 相似文献
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Shi-Jun Liang Bin Cheng Xinyi Cui Feng Miao 《Advanced materials (Deerfield Beach, Fla.)》2020,32(27):1903800
The discovery of two-dimensional (2D) materials with unique electronic, superior optoelectronic, or intrinsic magnetic order has triggered worldwide interest in the fields of material science, condensed matter physics, and device physics. Vertically stacking 2D materials with distinct electronic and optical as well as magnetic properties enables the creation of a large variety of van der Waals heterostructures. The diverse properties of the vertical heterostructures open unprecedented opportunities for various kinds of device applications, e.g., vertical field-effect transistors, ultrasensitive infrared photodetectors, spin-filtering devices, and so on, which are inaccessible in conventional material heterostructures. Here, the current status of vertical heterostructure device applications in vertical transistors, infrared photodetectors, and spintronic memory/transistors is reviewed. The relevant challenges for achieving high-performance devices are presented. An outlook into the future development of vertical heterostructure devices with integrated electronic and optoelectronic as well as spintronic functionalities is also provided. 相似文献
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Xiwen Zhang Zhaobo Zhou Xing Yu Yilv Guo Yunfei Chen Jinlan Wang 《Advanced functional materials》2023,33(32):2301353
Ferroelectric (FE) control of magnetism at nanoscale, for instance, FE control of the polarity of spin-polarized current is crucial for technological advances in magnetoelectric and spintronic applications. However, this fascinating functionality has not been reported in nanoscale systems yet. Herein, a new class of FE/A-type antiferromagnetic heterobilayer/FE van der Waals (vdW) multiferroic structures is found, in which the FE control of polarity of spin-polarized current is found possible. Take Sc2CO2/CrSiTe3/CrGeTe3/Sc2CO2 heterostructure as a successful example. First-principles calculations reveal that its polarity of half-metallicity can be switched by flipping the FE polarization orientation. Meanwhile, device transport simulation shows that its up/down spin current transmission ratio is as large as 0.1 × 103 at Sc2CO2 configuration and is only 2.6 × 10−3 at Sc2CO2 configuration in the vdW multiferroic heterostructures. Essentially, it stems from the reversible FE switch of the internal electric field across the CrSiTe3/CrGeTe3 heterobilayer and the FE control of the interfacial effect between Sc2CO2 and Cr(Si/Ge)Te3 layers. This work opens a direction for constructing low-energy-dissipation, non-volatile, and high-sensitive spintronic devices such as spin field-effect transistors. 相似文献
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Neil Leach 《Architectural Design》2017,87(6):6-15
As Senior Curator in the Department of Architecture and Design at the Museum of Modern Art, New York, Paola Antonelli treats digital and analogue design with equal regard. Here she talks to Guest-Editor Neil Leach about some of her decisions. She discusses the distinctions between design, art and architecture; how she keeps a clear head amid the prevailing euphoria over new technologies, in order to choose only those pieces that also represent successful design; whom she views as paragons of design in the digital age; and why she believes that architectural education needs to be reinvented. 相似文献
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Antoine Picon 《Architectural Design》2010,80(3):94-99
In the concluding article of the main section of this issue, Antoine Picon evokes the earlier meaning of territory for administrators, architects and engineers, as lands that were integrated into nations or colonies by the early modern European countries. Picon traces how 18th- and 19th-century perceptions of territory with an emphasis on administrative separation fed into an attitude of both distance and sensitivity to landscape, as exemplified by the Romantic movement in painting and literature; a heritage that continued into the 20th century in architecture with its emphasis on rationalisation. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
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