|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Collective Magnetic Behavior of Graphene Nanohole Superlattices显示文摘We predict a new class of 2-D crystalline“bulk”magnets-the graphene nanohole(GNH)superlattices with each GNH acting like a“super”magnetic atom,using first principles calculations.We show that such superlattices can exhibit long-range magnetic order above room temperature,with a collective magnetic behavior governed by inter-NH spin spin interactions in additional to intra-NH spin ordering.Furthermore,magnetic semiconductors can be made by doping magnetic NHs into semiconducting NH superlattices.The possibility of engineering magnetic GNHs for storage media and spintronics applications is discussed. | Decai Yu Elizabeth MLupton Miao Liu Wei Liu Feng Liu | 2008 | Nano Research2008，1，1： | 4 |
| 2 | InAs-based interband cascade lasers at 4.0 μm operating at room temperature显示文摘InAs-based interband cascade lasers(ICLs) with InAs plasmon waveguides or InAs/AlSb superlattice(SL) waveguides were demonstrated at emission wavelengths below 4.1 μm. The threshold current densities of the lasers with SL waveguides were 37 A/cm^2 at 77 K in continuous wave mode. The operation temperature of these lasers reached room temperature in pulsed mode. Compared with the thick InAs n++ plasmon cladding layer, the InAs/AlSb superlattice cladding layers have greater advantages for ICLs with wavelengths less than 4 μm even in InAs based ICLs because in the short-wavelength region they have a higher confinement factor than InAs plasmon waveguides. | Tian Yu Shuman Liu Jinchuan Zhang Bo Xu Lijun Wang Junqi Liu Ning Zhuo Shenqiang Zhai Xiaoling Ye Yonghai Chen Fengqi Liu Zhanguo Wang | 2018 | Journal of Semiconductors2018，39，11： | 3 |
| 3 | ELECTRONIC STRUCTURES OF (CdSe)_n/(ZnSe)_m STRAINED-LAYER SUPERLATTICES显示文摘The electronic structures of (CdSe)n/(ZnSe)m strained-lager soperfattice (SLS) were investigated by the recursion method in the tight-bindiop opproximation. The total,local, and partial density of states were calculated for n=1, m=5.The total density of states (TDOS) for bulk CdSe, ZnSe and n=1, 3, m=1, 3, 5, for SLS were investigated.Fermi energy, the band gap, the valence of an atom, and the ionization potential and the electron affinity were discassed. | HL. Huang J.H Xing G.L. Liu and G.Y Zhang(Department of Electrouic Science and Engineering, Liaoning University Shenyang 110036, China)(Department of Physics, Liaoning University Shenyang 110036, China)(Shenyang Polytechnic University Shenyan 110023, Chin | 1997 | Acta Metallurgica Sinica(English Letters)1997，10，1： | 2 |
| 4 | Improvement of tunnel compensated quantum well infrared detector显示文摘To reduce the difficulty of the epitaxy caused by multiple quantum well infrared photodetector(QWIP)with tunnel compensation structure,an improved structure is proposed.In the new structure,the superlattices are located between the tunnel junction and the barrier as the infrared absorption region,eliminating the effect of doping concentration on the well width in the original structure.Theoretical analysis and experimental verification of the new structure are carried out.The experimental sample is a two-cycle device,each cycle contains a tunnel junction,a superlattice infrared absorption region and a thick barrier.The photosurface of the detector is 200×200μm^2 and the light is optically coupled by 45°oblique incidence.The results show that the optimal operating voltage of the sample is-1.1 V,the dark current is 2.99×10^-8A,and the blackbody detectivity is1.352×10^8 cm·Hz^1/2·W^-1at 77 K.Our experiments show that the new structure can work normally. | Chaohui Li Jun Deng Weiye Sun Leilei He Jianjun Li Jun Han Yanli Shi | 2019 | Journal of Semiconductors2019，40，12： | 2 |
| 5 | Scalable fabrication of geometry-tunable self-aligned superlattice photonic crystals for spectrum-programmable light trapping显示文摘Superlattice photonic crystals (SPhCs) possess considerablepotentials as building blocks for constructing high-performancedevices because of their great flexibilities in opticalmanipulation. From the prospective of practical applications,scalable fabrication of SPhCs with large-area uniformity and precisegeometrical controllability has been considered as one prerequisitebut still remains a challenge. | Zhijie Wang | 2019 | Journal of Semiconductors2019，40，5： | 2 |
| 6 | Crystalline InGaZnO quaternary nanowires with superlattice structure for high-performance thin-film transistors显示文摘Amorphous indium-gallium-zinc oxide (a-IGZO) materials have been widely explored for various thin-film transistor (TFT) applications;however, their device performance is still restricted by the intrinsic material issues especially due to their non-crystalline nature. In this study, highly crystalline superlattice-structured IGZO nanowires (NWs) with different Ga concentration are successfully fabricated by enhanced ambient-pressure chemical vapor deposition (CVD). The unique superlattice structure together with the optimal Ga concentration (i.e., 31 at.%) are found to effectively modulate the carrier concentration as well as efficiently suppress the oxygen vacancy formation for the superior NW device performance. In specific, the In1.8Ga1.8Zn2.4O7 NW field-effect transistor exhibit impressive device characteristics with the average electron mobility of ~ 110 cm^2-V^-1·s^-1 and on/off current ratio of ~ 10^6. Importantly, these NWs can also be integrated into NW parallel arrays for the construction of high-performance TFT devices, in which their performance is comparable to many state-of-the-art IGZO TFTs. All these results can evidently indicate the promising potential of these crystalline superlattice-structured IGZO NWs for the practical utilization in next-generation metal-oxide TFT device technologies. | Fangzhou Li SenPo Yip Ruoting Dong Ziyao Zhou Changyong Lan Xiaoguang Liang Dapan Li You Meng Xiaolin Kang Johnny C. Ho | 2019 | Nano Research2019，12，8： | 1 |
| 7 | Electronic properties of size-dependent MoTe2/WTe2 heterostructure显示文摘Lateral two-dimensional(2D) heterostructures have opened up unprecedented opportunities in modern electronic device and material science. In this work, electronic properties of size-dependent MoTe2/WTe2 lateral heterostructures(LHSs)are investigated through the first-principles density functional calculations. The constructed periodic multi-interfaces patterns can also be defined as superlattice structures. Consequently, the direct band gap character remains in all considered LHSs without any external modulation, while the gap size changes within little difference range with the building blocks increasing due to the perfect lattice matching. The location of the conduction band minimum(CBM) and the valence band maximum(VBM) will change from P-point to Γ-point when m plus n is a multiple of 3 for A-mn LHSs as a result of Brillouin zone folding. The bandgap located at high symmetry Γ-point is favourable to electron transition, which might be useful to optoelectronic device and could be achieved by band engineering. Type-II band alignment occurs in the MoTe2/WTe2 LHSs, for electrons and holes are separated on the opposite domains, which would reduce the recombination rate of the charge carriers and facilitate the quantum efficiency. Moreover, external biaxial strain leads to efficient bandgap engineering. MoTe2/WTe2 LHSs could serve as potential candidate materials for next-generation electronic devices. | 刘婧 马亚强 戴雅薇 陈炀 李依 唐亚楠 戴宪起 | 2019 | Chinese Physics B2019，28，10： | 1 |
| 8 | In situ fabrication of Na3V2(PO4)3 quantum dots in hard carbon nanosheets by using lignocelluloses for sodium ion batteries显示文摘The rational assembly of quantum dots on two-dimensional(2 D) carbonaceous materials is very promising to produce materials, but remains a challenge. Here, we develop an assembly strategy of growing Na3 V2(PO4)3 quantum dots with superlattice structure(NVP-QDs-SL) for obtaining precise control of the size, distribution and crystallinity. The multifunctional lignocelluloses(LCs) used as a hard carbon source induce heterogeneous nucleation and confined growth of NVP-QDs-SL, leading to the uniform distribution of NVP-QDs-SL in H/S-doped hard carbon ultra-thin nanosheets(HCS). Detailed electrochemical analysis results from sodium-ion batteries of NVP-QDs-SL show that NVP-QDs-SL could trap the electrons inside HCS, significantly enhancing Na ion storage and transfer kinetics. Compared to the common Na3 V2(PO4)3 nanoparticle cathode, the NVP-QDs-SL/HCS cathode exhibits a high reversible capacity of 149.2 m A h g^-1 at a 0.1 C rate, which is far beyond the theoretical capacity of Na3 V2(PO4)3(117.6 m A h g^-1).At the ultrahigh current rate of 100 C, this cathode still remains a high discharge capacity of 40 m A h g-1.Even after cycling at 20 C over 3000 cycles, an ultrahigh coulombic efficiency close to 100% is still obtained,highlighting its excellent long cycling life, remarkable rate performance and energy density. | Qihao Zhang Xudong Zhang Wen He Guogang Xu Manman Ren Jinhua Liu Xuena Yang Feng Wang | 2019 | Journal of Materials Science & Technology2019，35，10： | 1 |
| 9 | Comparison of short period InAs/GaSb superlattices on GaSb and GaAs substrates显示文摘Type II superlattices (SLs) short period InAs(4ML)/GaSb(8ML) were grown by molecular-beam epitaxy on lattice-mismatched GaAs substrates and on GaSb substrates. A smooth GaSb epilayer was formed on GaAs substrates by inserting mulit-buffer layers including an interfacial misfit mode AlSb quantum dot layer and AlSb/GaSb superlattices smooth layer. SLs grown on GaAs substrates (GaAs-based SLs) showed well-resolved satellite peaks in XRD. GaSb-based SLs with better structural quality and smoother surface showed strong photoluminescence at 2.55 μm with a full width at half maximum (FWHM) of 20 meV, narrower than 31 meV of GaAs-based SLs. Inferior optical absorption of GaAs-based SL was observed in the range of 2―3 μm. Photoresponse of GaSb-based SLs showed the cut-off wavelength at 2.6 μm. | GUO Jie CHEN HuiJuan SUN WeiGuo HAO RuiTing XU YingQiang NIU ZhiChuan | 2009 | Science China(Technological Sciences)2009，52，1： | 1 |
| 10 | InAs/InAsSb type-Ⅱ superlattice with near room-temperature long-wave emission through interface engineering显示文摘Ga-free InAs/InAsSb type-Ⅱ superlattices(T2SL) have extensive application prospective in infrared photodetectors. Achieving higher operation temperature is critical to its commercial applications. Here, a fractional monolayer alloy method was used to grow InAsSb alloy with better controlled alloy composition. The as-grown T2SL gave eleven satellite peaks and a first satellite peak with a narrow full-width-half-maximum (FWHM) of 20.5arcsec (1 arcsec=0.01592°). Strain mapping results indicated limited Sb diffusion through the As-Sb exchange process at the interface. Moreover, unlike interface states caused by the As-Sb exchange effect, this relatively clear interface was distinctive with localized states with higher activation energies of the non-radiative recombination process ((18±1) meV and (84±12) meV at different temperature ranges), which means that this interface state introduced by fractional monolayer alloy growth method can effectively suppress Auger recombination process in T2SL. Through this interface engineering of InAs/InAsSb Type-Ⅱ superlattice, it achieved detective photoluminescence (PL) signal with the center wavelength of 9μm at 250K. | Bo-Wen Zhang Dan Fang Xuan Fang Hong-Bin Zhao Deng-Kui Wang Jin-Hua Li Xiao-Hua Wang Dong-Bo Wang | 2022 | Rare Metals2022，41，3： | 1 |
| 11 | A facile strategy to prepare monodisperse nanocrystals with initiative assembly into superlattice显示文摘A facile green strategy,low temperature in-situ chemical conversion,is reported to prepare nanocrystals with initiative 'bottom-up' assembly into large-scale superlattice.The appropriate organic chalcogen precursors were chosen to control the kinetics of these reactions to keep monodisperse morphology.They also provide the capping ligands to acquire van der Waals interactions between ligands and dipole moment to self-assemble into large-scale superlattice.This strategy could flexibly modulate the composition of semiconductor nanostructures,such as cations,anions and even the heterostructures with metal nanoparticles.This bottom-up assembly behavior is necessary for the development of optoelectronic devices of Ⅱ-Ⅵ semiconductor nanocrystals. | Qian Zhao Jiatao Zhang Hesun Zhu | 2013 | Progress in Natural Science:Materials International2013，23，6： | 1 |
| 12 | High quantum efficiency long-/long-wave dual-color type-Ⅱ InAs/GaSb infrared detector显示文摘A long-/long-wave dual-color detector with N-M-π-B-π-M-N structure was developed based on a type-Ⅱ InAs/GaSb superlattice. The saturated responsivity was achieved under low bias voltage for both channels. The device could be operated as a single detector for sequential detection and showed high quantum efficiencies. The peak quantum efficiencies of long-wavelength infrared band-1(blue channel) and long-wavelength infrared band-2(red channel) were 44% at 6.3 μm under 20 mV and 57% at 9.1 μm under-60 mV, respectively. The optical performance for each channel was achieved using a 2 μm thickness absorber. Due to the high QE, the specific detectivities of the blue and red channels reached5.0×10^(11) cm·Hz^(1/2)/W at 6.8 μm and 3.1×10^(11) cm·Hz1^(1/2)/W at 9.1 μm, respectively, at 77 K. | 蒋志 孙姚耀 郭春妍 吕粤希 郝宏玥 蒋洞微 王国伟 徐应强 牛智川 | 2019 | Chinese Physics B2019，28，3： | 1 |
| 13 | Microwave transmittance characteristics in different uniquely designed one-dimensional plasma photonic crystals显示文摘Plasma photonic crystals(PPCs)are emerging as a powerful instrument for the dynamical control of the electromagnetic properties of a propagating wave.Here we demonstrate several one-dimensional(1 D)PPCs with uniquely designed superlattice structures,annular structures or with incorporation of the third material into the primitive unit cell.The influences of the properties of the third material as well as the structural configurations of suplerlattices on the transmittance characteristics of PPCs have been investigated by use of the finite element method.The optimal design strategy for producing PPCs that have more and larger band gaps is provided.These new schemes can potentially be extended to 2 D or 3 D plasma crystals,which may find broad applications in the manipulation of microwaves and terahertz waves. | 吴志成 董梦菲 范伟丽 高匡雅 梁月强 刘富成 | 2021 | Plasma Science and Technology2021，23，6： | 1 |
| 14 | Mid-infrared laser with 1.2 W output power based on PPLT显示文摘The optical parametric oscillator (OPO) based on the periodically poled lithium tantalate (PPLT) crystal (40 mm×5 mm×1 mm) is fabricated. The OPO is pumped by a Q-switched Nd:YAG laser working at 1.064 μm. An average idler output power (around 3.8 μm) of 1.2 W and signal output power (around 1.48 μm) of 3 W are obtained when the pump power is 20 W. | Lü XinJie, ZHAO Gang, LI GuiJun, GAO ZhiDa, PAN ShuDi & ZHU ShiNing National Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，4： | 1 |
| 15 | Research development on fabrication and optical properties of nonlinear photonic crystals显示文摘Since the lasers at fixed wavelengths are unable to meet the requirements of the development of modern science and technology,nonlinear optics is significant for overcoming the obstacle.Investigation on frequency conversion in ferroelectric nonlinear photonic crystals with different superlattices has been being one of the popular research directions in this field.In this paper,some mature fabrication methods of nonlinear photonic crystals are concluded,for example,the electric poling method at room temperature and the femtosecond direct laser writing technique.Then the development of nonlinear photonic crystals with one-dimensional,two-dimensional and three-dimensional superlattices which are used in quasi-phase matching and nonlinear diffraction harmonic generation is introduced.In the meantime,several creative applications of nonlinear photonic crystals are summarized,showing the great value of them in an extensive practical area,such as communication,detection,imaging,and so on. | Huangjia LI Boqin MA | 2020 | Frontiers of Optoelectronics2020，13，1： | 1 |
| 16 | Spherical Packing Superlattices in Self-Assembly of Homogenous Soft Matter:Progresses and Potentials显示文摘The construction of complex superlattices using homogenous soft matter has great potential for the bottom-up fabrication of complex,nanoscale structures.This topic is not only interested in scientific exploring for new concepts of supramolecular crystals with nanometer in sizes,which is about thousand times larger in volumes than those of normal crystals,but also practically important to provide construction principles of metamaterials which are artificially structured materials for controlling and manipulating light,sound,and other physical behaviors.These systems have fast assembly kinetics and convenient processing procedures,making them ideal for large-scale superlattice production.In this perspective,we focus on recent developments in the construction of complex spherical packing superlattices using homogenous soft self-assemblies.We discuss the general mechanism of those formations of supramolecular motifs and provide an overview of the spherical packing superlattices self-assembled by homogenous soft matters based on different volume asymmetry.Additionally,we outline the potentials of utilizing this approach in constructing novel superlattices as well as its future challenges. | Yuchu Liu Huanyu Lei Qing-Yun Guo Xianyou Liu Xinghan Li Yuean Wu Weiyi Li Wei Zhang Geng Xin Liu Xiao-Yun Yan Stephen Z.D.Cheng | 2023 | Chinese Journal of Polymer Science2023，41，5： | 0 |
| 17 | SURFACE(RAYLEIGH)ACOUSTIC WAVES SPECTROSCOPY OF ONE-DIMENSIONAL QUASIPERIODIC SUPERLATTICES | 夏桦 程光煦 张维 陈坤基 张杏奎 冯端 | 1991 | Progress in Natural Science:Materials International1991，1，4： | 0 |
| 18 | Persistent half-metallic ferromagnetism in a(111)-oriented manganite superlattice显示文摘We employ electronic structure calculations to show that a(111)-oriented(LaMnO_(3))_(12)∣(SrMnO_(3))_(6)superlattice retains a half-metallic ferromagnetic character despite its large thickness.We link this behaviour to the strain and the octahedral connectivity between the layers.This also gives rise to breathing modes,which are coupled to charge and spin oscillations,whose components have a pure e_(g)character.Most interestingly,the magnetisation reaches its maximum value inside the LaMnO_(3)region and not at the interface,which is fundamentally different from what observed for the(001)orientation.The inter-atomic exchange coupling shows that the magnetic order arises from the double-exchange mechanism,despite competing interactions inside the SrMnO_(3)region.Finally,the van Vleck distortions and the spin oscillations are crucially affected by the variation of Hund’s exchange and charge doping,which allows us to speculate that our system behaves as a Hund’s metal,creating an interesting connection between manganites and nickelates. | Fabrizio Cossu Heung-Sik Kim Biplab Sanyal Igor Di Marco | 2022 | npj Computational Materials2022，，1： | 0 |
| 19 | PROGRESS IN ION BEAM ANALYSIS AT FUDAN UNIVERSITY显示文摘Progres in ion beam analysis at Fudan University in the recent years is briefly reviewed. Presented as examples of the research activities performed in this field are the following projects: (1) Nuclear potential resonance scattering of 6.25 MeV and 4.25 MeV helium ions for simultaneous compositional analysis of carbon and oxygen in a Mylar, a SnInO, and some other film samples: (2) Determination of stoichiometry of a high-temperature superconducting Y-Ba-Cu-O sample by backscattering of 8.8 MeV helium ions; (3) Backscattering and channeling analysis of multilayered structures periodically consisting of layers of pure Si and alternate layers of Ge and Si, grown on (100) Si substrates by molecular beam epitaxy: (4) Studies of surface structure of Al(100) by the use of MeV ions backscattering and channeling surface peak: and (5) MeV ion microbeam analysis and the use of PIXE method in DNA study. etc. | 杨福家 汤家镛 | 1990 | Nuclear Science and Techniques1990，1，Z1： | 0 |
| 20 | Two-dimensional ferromagnetic superlattices显示文摘Mechanically exfoliated two-dimensional ferromagnetic materials(2D FMs)possess long-range ferromagnetic order and topologically nontrivial skyrmions in few layers.However,because of the dimensionality effect,such few-layer systems usually exhibitmuch lower Curie temperature(TC)compared to their bulk counterparts.It is therefore of great interest to explore effective approaches to enhance their TC,particularly in wafer-scale for practical applications.Here,we report an interfacial proximity-induced high-TC 2D FM Fe3GeTe2(FGT)via A-type antiferromagnetic material CrSb(CS)which strongly couples to FGT.A superlattice structure of(FGT/CS)n,where n stands for the period of FGT/CS heterostructure,has been successfully produced with sharp interfaces by molecular-beam epitaxy on 2-inch wafers.By performing elemental specific X-ray magnetic circular dichroism(XMCD)measurements,we have unequivocally discovered that TC of 4-layer Fe3GeTe2 can be significantly enhanced from 140 K to 230 K because of the interfacial ferromagnetic coupling.Meanwhile,an inverse proximity effect occurs in the FGT/CS interface,driving the interfacial antiferromagnetic CrSb into a ferrimagnetic state as evidenced by double-switching behavior in hysteresis loops and the XMCD spectra.Density functional theory calculations show that the Fe-Te/Cr-Sb interface is strongly FMcoupled and doping of the spin-polarized electrons by the interfacial Cr layer gives rise to the TC enhancement of the Fe3GeTe2 films,in accordance with our XMCDmeasurements.Strikingly,by introducing rich Fe in a 4-layer FGT/CS superlattice,TC can be further enhanced to near room temperature.Our results provide a feasible approach for enhancing the magnetic order of few-layer 2D FMs in wafer-scale and render opportunities for realizing realistic ultra-thin spintronic devices. | Shanshan Liu Ke Yang Wenqing Liu Enze Zhang Zihan Li Xiaoqian Zhang Zhiming Liao Wen Zhang Jiabao Sun Yunkun Yang Han Gao Ce Huang Linfeng Ai Ping Kwan Johnny Wong Andrew Thye Shen Wee Alpha TN’Diaye Simon AMorton Xufeng Kou Jin Zou Yongbing Xu Hua Wu Faxian Xiu | 2020 | National Science Review2020，7，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员