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Synthesis,crystal Structure and Prosperities of 10-(4,5-Dibenzylthio-1,3-dithiol-2-ylidene)anthracen-9(10H)-one

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Chinese Journal of Structural Chemistry 2009年第6期28卷 677-682页

作者：朱玉兰田礼彬阚玉和尹起范吴凯崔亨波 Jiangsu Key Laboratory for Chemistry of Low-dimensional Materials Huaiyin Teachers College Department of Chemistry Science College Yanbian University

The title compound 10-（4,5-dibenzylthio-1,3-dithiol-2-ylidene）anthracen-9（10H）- one （C31H22OS4） has been synthesized, and its crystal structure was prepared by crystallization from CH2Cl2-MeOH. The crystal belongs to the triclinic system, space group Pi with a = 10.9758（3）, b = 11.4241（4）, c = 11.7460（2）A^°, α = 62.379（2）, β = 81.227（3）, γ = 80.321（2）°, Mr = 538.73, V = 1281.69（7） A^°^3, Z = 2, Dc = 1.396 g/cm^3, F（000） = 560,μ = 0.395 mm^-1, the final R = 0.0291 and wR = 0.0739. The molecular structure is severely distorted from planarity. The central ring of anthraquinone moiety adopts a boat conformation, while the two outer benzene rings are tilted in the opposite direction to form a dihedral angle of 23.65°. The photocurrent generation was measured and an anodic photocurrent response was obtained. The electronic spectrum was studied by using TDDFr method on the basis of optimized geometries with B3LYP method. The obtained results are in good agreement with the experimental values.

关键词： 1,3-dithiol-2-ylidene crystal structure photoeurrent response density functional theory

Switchable half-metallicity in A-type antiferromagnetic NiI_(2)bilayer coupled with ferroelectric In_(2)Se_(3)

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npj Computational Materials 2022年第1期8卷 2091-2098页

作者： Yaping Wang Xinguang Xu Xian Zhao Weixiao Ji Qiang Cao Shengshi Li Yanlu Li State Key Lab of crystal Materials and Institute of crystal Materials Shandong University250100JinanChina Center for Optics Research and Engineering of Shandong University Shandong University266237QingdaoChina Spintronics Institute University of Jinan250022JinanChina

Electrically controlled half-metallicity in antiferromagnets is of great significance for both fundamental research and practical ***,by constructing van der Waals heterostructures composed of two-dimensional(2D)A-type antiferromagnetic NiI_(2)bilayer(bi-NiI_(2))and ferroelectric In_(2)Se_(3)with different thickness,we propose that the half-metallicity is realizable and switchable in the bi-NiI_(2)proximate to In_(2)Se_(3)bilayer(bi-In_(2)Se_(3)).The polarization flipping of the bi-In_(2)Se_(3)successfully drives transition between half-metal and semiconductor for the bi-NiI_(2).This intriguing phenomenon is attributed to the joint effect of polarization field-induced energy band shift and interfacial charge ***,the easy magnetization axis of the bi-NiI_(2)is also dependent on the polarization direction of the bi-In_(2)Se_(3).The half-metallicity and magnetic anisotropy energy of the bi-NiI_(2)in heterostructure can be effectively manipulated by *** findings provide not only a feasible strategy to achieve and control half-metallicity in 2D antiferromagnets,but also a promising candidate to design advanced nanodevices.

关键词： polarization metallic ferroelectric

Metal sulfides based composites as promising efficient microwave absorption materials:A review

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Journal of Materials Science & Technology 2022年第9期104卷 244-268页

作者： Bin Li Fenglong Wang Kejun Wang Jing Qiao Dongmei Xu Yunfei Yang Xue Zhang Longfei Lyu Wei Liu Jiurong Liu School of Materials Science and Engineering Shandong UniversityJinan 250061China 96901 Troops of the People’s Liberation Army Beijing 100085China State Key Laboratory of crystal Materials Institute of Crystal MaterialsShandong UniversityJinan 250100China

The increasingly severe electromagnetic microwave pollution raises higher requirements for the development of efficient microwave absorption(MA)*** sulfides are regarded as potential robust MA materials because of their unique optical,thermal,electrical,and magnetic properties,as well as the controllable ***,due to the limited MA performances of unary metal sulfides,morphology regulations and foreign materials hybridizations are adopted as effective strategies to improve their MA *** years witnessed the fast research progresses on the metal sulfides based MA materials and thus,a systematic literature survey on the materials design,fabrication,characterizations,MA behaviors,and the mechanisms behind is,highly desirable to summarize the rapid progress of this hot research area so as to provide guidance for the future development *** review firstly reviewed the research background,research progress,and basic principles of MA ***,the present synthetic methods and performance improvement strategies of metal sulfides based MA materials are systematically ***,by comparing the MA properties of one-dimensional,two-dimensional,and three-dimensional metal sulfides based composites,the influence of dimensionality and morphology on the MA properties are *** summarizing the research process of metal sulfides/dielectrics composites,metal sulfides/magnets composites,and metal sulfides/dielectrics/magnets composites MA materials,the influence of foreign materials hybridizations on the loss mechanisms and impedance matching conditions of metal sulfides based composites are ***,the challenges and development prospects of metal sulfides based MA materials are *** review would provide a comprehensive understanding and insightful guidance for the exploration and development of efficient MA materials with thin thickness,light weight,wide absorption bandwidth,and strong abs

关键词： Metal sulfides Microwave absorption Structure regulation Materials hybridization Impedance matching

Zeeman effects on Josephson current in d-wave superconductor/d-wave superconductor junctions

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Chinese Physics B 2008年第5期17卷 1893-1901页

作者：廖艳华董正超尹在峰付浩 Department of Physics Huaiyin Teachers College and Jiangsu Province Key Laboratory for Chemistry of Low-Dimensional Materials Department of Physics College of Science Yanbian University

This paper solves a self-consistent equation for the d-wave superconducting gap and the effective exchange field in the mean-field approximation, and studies the Zeeman effects on the d-wave superconducting gap and thermodynamic potential. The Josephson currents in the d-wave superconductor（S）/insulating layer（I）/d-wave S junctions are calculated as a function of the temperature, exchange field, and insulating barrier strength under a Zeeman magnetic field on the two d-wave Ss. It is found that the Josephson critical currents in d-wave S/d-wave S junction to a great extent depend on the relative orientation of the effective exchange field of the two S electrodes, and the crystal orientation of the d-wave S. The exchange field under certain conditions can enhance the Josephson critical current in a d-wave S/I/d-wave S junction.

关键词： Zeeman effect d-wave S/d-wave S ferromagnetic d-wave superconductor Josephson current

Recent progress in terahertz modulation using photonic structures based on two-dimensional materials

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InfoMat 2021年第10期3卷 1110-1133页

作者： Ziming Wang Jie Qiao Shuqi Zhao Shilei Wang Chuan He Xutang Tao Shanpeng Wang State Key Laboratory of crystal Materials Institute of Crystal MaterialsShandong UniversityJinanChina School of Materials Science&Engineering Beijing Institute of TechnologyBeijingChina

Terahertz(THz)technology has attracted great attention in the past few decades for its unique applications in various fields,including spectroscopy,noninvasive detection,wireless communications,and *** parallel to this,the practical,fast,and broadband modulation of THz waves is becoming ***-dimensional(2D)materials exhibit unusual optical and electrical properties,which has prompted tremendous interest and significant advances in THz *** review provides the recent progress in 2D materials-based THz modulators,outlining the operating principles,including all-optical,electro-optic,magneto-optic,and other exotic *** focus on the recent advances in THz modulation by the designed photonic structures,such as heterostructure,metamaterial,capacitor,optical cavity,and waveguide ***,we discussed the challenges and opportunities for 2D materials-based THz modulators and presented our prospects for the future development.

关键词： 2D material optoelectronic device photonic structure terahertz modulation

Thickness-dependent highly sensitive photodetection behavior of lead-free all-inorganic CsSnBr_(3) nanoplates

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Rare Metals 2022年第5期41卷 1753-1760页

作者： Dong Liu Yan-Xue Yin Feng-Jing Liu Cheng-Cheng Miao Xin-Ming Zhuang Zhi-Yong Pang Ming-Sheng Xu Ming Chen Zai-Xing Yang School of Physics State Key Laboratory of Crystal MaterialsSchool of MicroelectronicsShandong UniversityJinan 250100China

Non-layered two-dimensional(2D) lead-free all-inorganic perovskites nanoplates have recently attracted considerable attention in photodetectors;however, the indepth investigation of thickness on photodetection performance is still lacking. In this work, by constructing the famous metal-semiconductor-metal photodetectors, the photodetection behaviors of thickness-controlled CsSnBr;nanoplates are investigated systematically. Ni electrodes are adopted for ensuring the good ohmic contact behaviors of as-fabricated photodetectors. With the increase in thickness, the photodetection performances improve accordingly, such as photocurrent increases from 0.22 to 19.40 nA, responsivity increases from 72.9 to 4893.7 mA·W^(-1), rise/decay time decreases from 11/35 to 3/10 ms, respectively. Notability, the dark current also increases with the increase in thickness, making the further investigation on the reduction in dark current *** of the as-fabricated photodetectors are stable, suggesting the careful thickness selection in next-generation high-performance lead-free all-inorganic perovskites photodetectors.

关键词： Thickness Photodetection Lead-free all-inorganic perovskites Non-layered two-dimensional perovskites CsSnBr3 nanoplates

Synthesis and Supramolecular Structure of a Novel π-Extended TTF Derivative

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Chinese Journal of Structural Chemistry 2009年第8期28卷 1003-1007页

作者：田礼彬朱玉兰曹丽马凤赵莲花 Department of Chemistry College of Science Yanbian University Jiangsu Key Laboratory for Chemistry of Low-dimensional Materials Huaiyin Teachers College

A novel π-extended TTF derivative （C24H2ON658, Mr=649.02） has been synthesized and characterized by IR, ^1H NMR and MS. The crystal structure was prepared by crystallization from CH2Cl2-MeOH. The crystal belongs to the monoclinic system, space group P21/c with a = 5.465（5）, b = 26.835（5）, c = 10.180（5）A, β= 101.929（5）°, V = 1460.7（15） A^3, Z = 2, Dc = 1.476 g/cm^3, F（000） = 668,μ = 0.638 mm^-1, the final R = 0.0390 and wR = 0.0586 for 1694 observed reflections with I 〉 2σ（I）. The structure reveals planarity of the two dithiole rings, different from the boat-shaped structure usually found in neutral derivatives of TTF. The central ring of the benzene also adopts a planar conformation, while it is twisted from planarity of the two dithiole rings and forms a dihedral angle of 61.8°. The molecule exhibits a three-dimensional supramolecular architecture constructed through hydrogen bonds. In the molecular structure a noticeable feature can be found that there exist S…S interactions which further reinforce the 3D supramolecular framework.

关键词： π-extended TTF synthesis crystal structure

Pressure-induced Lifshitz transition in the type Ⅱ Dirac semimetal PtTe_2

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Science China(Physics,Mechanics & Astronomy) 2019年第4期62卷 91-97页

作者： FengLiang Liu JiaHeng Li KeNan Zhang Shang Peng HuaQing Huang MingZhe Yan NaNa Li Qian Zhang SongHao Guo XuJie Lü Peng Cai LiFeng Yin ShuYun Zhou WenHui Duan Jian Shen WenGe Yang State Key Laboratory of Surface Physics and Department of Physics Fudan University Center for High Pressure Science and Technology Advanced Research (HPSTAR) State Key Laboratory of Low dimensional Quantum Physics and Department of Physics Tsinghua University Institute for Nanoelectronic Devices and Quantum Computing Fudan University Collaborative Innovation Center of Advanced Microstructures High Pressure Synergetic consortium (HPSynC) Geophysical Laboratory Carnegie Institution of Washington

Numerous exotic properties have been discovered in Dirac Semimetals(DSMs) and Weyl Semimetals(WSMs). In a given DSM/WSM, the Dirac/Weyl nodes usually coexist with other bulk states, making their respective contribution elusive. In this work, we distinguish the role of bulk states from the tilted Dirac nodes on the transport properties in DSMs. Specifically, we applied pressure to a type-II DSM material, PtTe2, and studied its pressure modified electronic and lattice structure systematically by using in situ transport measurements and X-ray diffraction(XRD). A pressure-induced transition at about 20 GPa is revealed in the transport properties, while the layered lattice structure is robust against pressure as illustrated in XRD measurement *** functional theory(DFT) calculations suggest that this is originated from the Lifshitz transition in the bulk states. Our findings provide evidence to identify the bulk states' influence on transport from the topologically-protected DSM states in the DSM material.

关键词： Dirac semimetals diamond anvil cells X-ray diffraction transport measurement band structure calculation

Exploitable magnetic anisotropy and half-metallicity controls in multiferroic van der Waals heterostructure

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npj Computational Materials 2023年第1期9卷 60-70页

作者： Yaping Wang Xinguang Xu Weixiao Ji Shengshi Li Yanlu Li Xian Zhao State Key Lab of crystal Materials and Institute of crystal Materials Shandong UniversityJinan 250100China Spintronics Institute University of JinanJinan 250022China Center for Optics Research and Engineering of Shandong University Shandong UniversityQingdao 266237China

Two-dimensional(2D)XY ferromagnets have drawn pronounced interest in recent years,but the characteristic of easy-plane magnetization restricts their application in spintronics to some ***,we propose a general strategy for constructing multiferroic van der Waals heterostructures,aiming to achieve electrical control over the magnetic anisotropy in 2D XY *** validity of this strategy is verified by the heterostructure composed of ferromagnetic VBi_(2)Te_(4) and ferroelectric In_(2)Se_(3) *** manipulating the polarized states of In_(2)Se_(3),the VBi_(2)Te_(4) can be reversibly transformed between 2D XY and Heisenberg ferromagnets,characterized by the switching of easy magnetization axis between in-plane and out-of-plane *** interestingly,accompanied by the changes in magnetic anisotropy,the VBi_(2)Te_(4) also demonstrates a phase transition from a semiconductor to a half-metal state,which can be ascribed to the band alignment and interfacial charge *** switchable magnetic and electronic properties enable the heterostructure to be utilized in nonvolatile memory and logic ***,the half-metallicity and magnetocrystalline anisotropy energy of the heterostructure can be effectively tuned by biaxial *** findings not only pave the way for electrically nonvolatile control of 2D XY ferromagnet,but also facilitate the development of interfacial magnetoelectric physics and applications.

关键词： anisotropy metallic magnetic