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New extended method for ψ' scaling function of inclusive electron scattering

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中国科学:物理学、力学、天文学英文版 2023年第10期66卷 53-61页

作者： Lei Wang Qinglin Niu Jinjuan Zhang Jian Liu Zhongzhou Ren School of physics science and Engineering Tongji UniversityShanghai 200092China College of science China University of Petroleum(East China)Qingdao 266580China College of electronic and Information Engineering Shandong University of Science and TechnologyQingdao 266590China Laboratory of High Precision Nuclear Spectroscopy Insititute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China Guangxi Key Laboratory of Nuclear physics and Nuclear Technology Guangxi Normal UniversityGuilin 541004China Key Laboratory of Advanced Micro-Structure Materials Ministry of EducationShanghai 200092China

Scaling analyses have been successfully applied to study the inclusive electron scattering(e, e') over the past few decades. In this study, we utilize the ψ' scaling function in momentum space to analyze the(e, e') cross sections, where the nucleon momentum distributions are derived from self-consistent mean-field calculations. By further introducing the energy and momentum conservation in the scaling analysis, an improved ψ'scaling function is proposed to investigate the high-momentum part of the momentum distributions. Using the proposed scaling function, we systematically explore the effects of the nucleon-nucleon short-range correlation(NN-SRC) on the(e, e') cross sections. From the experimental(e, e') data, the NN-SRC strength is further extracted within the framework of the improved ψ'scaling function. The studies in this paper offer a new method to investigate the nucleon momentum distributions and the NN-SRC effects in nuclei.

关键词： inclusive electron scattering scaling analysis nucleon momentum distribution nucleon-nucleon correlation

Topological superconductivity in Janus monolayer transition metal dichalcogenides

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Chinese physics B 2022年第11期31卷 219-224页

作者： Xian-Dong Li Zuo-Dong Yu Wei-Peng Chen Chang-De Gong National Laboratory of Solid State Microstructure Department of PhysicsNanjing UniversityNanjing 210093China School of Information and electronic Engineering Zhejiang Gongshang UniversityHangzhou 310018China Shenzhen Institute for Quantum science and Engineering Southern University of Science and TechnologyShenzhen 518055China Center for Statistical and Theoretical Condensed Matter physics Zhejiang Normal UniversityJinhua 321004China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

The Janus monolayer transition metal dichalcogenides(TMDs)MXY(M=Mo,W,*** X,Y=S,Se,etc.)have been successfully synthesized in recent *** Rashba spin splitting in these compounds arises due to the breaking of out-of-plane mirror *** we study the pairing symmetry of superconducting Janus monolayer TMDs within the weak-coupling framework near critical temperature Tc,of which the Fermi surface(FS)sheets centered around bothΓand K(K′)*** find that the strong Rashba splitting produces two kinds of topological superconducting states which differ from that in its parent *** specifically,at relatively high chemical potentials,we obtain a timereversal invariant s+f+p-wave mixed superconducting state,which is fully gapped and topologically nontrivial,i.e.,a Z_(2) topological *** the other hand,a time-reversal symmetry breaking d+p+f-wave superconducting state appears at lower chemical *** state possess a large Chern number|C|=6 at appropriate pairing strength,demonstrating its nontrivial band *** results suggest the Janus monolayer TMDs to be a promising candidate for the intrinsic helical and chiral topological superconductors.

关键词： topological superconductivity Janus transition metal dichalcogenides(TMDs)

Sign reversal and manipulation of anomalous Hall resistivity in facing-target sputtered Pt/Mn_(4)N bilayers

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Rare Metals 2023年第2期42卷 591-601页

作者： Ze-Yu Zhang Jia-Wei Jiang Xiao-Hui Shi Xiang Liu Xia Chen Zhi-Peng Hou Wen-Bo Mi Tianjin Key Laboratory of Low Dimensional Materials physics and Preparation Technology School of ScienceTianjin UniversityTianjin300354China School of physics and electronic Engineering Linyi UniversityLinyi276000China College of science Civil Aviation University of ChinaTianjin300300China Guangdong Provincial Key Laboratory of Optical Information Materials and Technology&Institute for Advanced Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China

The magnetic and electronic transport properties manipulated by spin-orbit torque have been devoted much attention as they show a great promise for future spintronic ***,the spin dependent transport properties of the facing-target sputtered Pt/Mn_(4)N bilayers on MgO(001)substrates have been investigated *** Hall resistivity of Pt/Mn_(4)N bilayers is strongly dependent on temperature,applied current intensity,Mn_(4)N and Pt layer *** temperature-dependent sign reversal of anomalous Hall resistivity appears in Pt/Mn_(4)N bilayers,which is dominated by the competition between the magnetic proximity and spin Hall ***,the magnitude of anomalous Hall resistivity can be manipulated by applied current *** critical and saturation currents are related to Mn_(4)N and Pt layer ***,a Dzyaloshinskii-Moriya interaction coefficient(D)of 5.63 mJ·m^(-2)is calculated in Pt/Mn_(4)N/MgO *** details of the anomalous Hall effects in Pt/Mn_(4)N bilayers are helpful to understand the interfacial effects between heavy metals and ferrimagnets.

关键词： Pt/Mn_(4)N bilayer Hall resistivity Magnetic proximity effect Spin Hall effect(SHE) DzyaloshinskiiMoriya interaction(DMI)

Efficient potential-tuning strategy through p-type doping for designing cathodes with ultrahigh energy density

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National science Review 2020年第11期7卷 1768-1775页

作者： Zhiqiang Wang Da Wang Zheyi Zou Tao Song Dixing Ni Zhenzhu Li Xuecheng Shao Wanjian Yin Yanchao Wang Wenwei Luo Musheng Wu Maxim Avdeev Bo Xu Siqi Shi Chuying Ouyang Liquan Chen Department of physics Laboratory for Computational Materials PhysicsJiangxi Normal University State Key Laboratory of Advanced Special Steel School of Materials Science and Engineering Shanghai University Soochow Institute for Energy and Materials Innovations (SIEMIS) College of PhysicsOptoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow University State Key Lab of Superhard Materials College of Physics Jilin University Australian Nuclear science and Technology Organisation School of Chemistry University of Sydney Materials Genome Institute Shanghai University Beijing National Laboratory for Condensed Matter physics Institute of Physics Chinese Academy of Sciences

Designing new cathodes with high capacity and moderate potential is the key to breaking the energy density ceiling imposed by current intercalation chemistry on rechargeable batteries. The carbonaceous materials provide high capacities but their low potentials limit their application to anodes. Here, we show that Fermi level tuning by p-type doping can be an effective way of dramatically raising electrode potential. We demonstrate that Li（Na）BCF;/Li（Na）B;C;F;exhibit such change in Fermi level, enabling them to accommodate Li;（Na;） with capacities of 290–400（250–320） m Ah g;at potentials of 3.4–3.7（2.7–2.9） V, delivering ultrahigh energy densities of 1000–1500 Wh kg;. This work presents a new strategy in tuning electrode potential through electronic band structure engineering.

关键词： p-type doping strategy electrochemical potential tuning Li(Na)BCF2/B2C2F2 cathodes ultrahigh energy densities

Potential energy curves, transition dipole moments, and radiative lifetimes of KBe molecule

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Chinese physics B 2017年第3期26卷 291-296页

作者：万明杰金成国虞游黄多辉邵菊香 Computational physics Key Laboratory of Sichuan Province Yibin University Yibin 644007 China College of Optoelectronic Technology Chengdu University of Information Technology Chengdu 610225 China School of physics and electronic Engineering Yibin University Yibin 644007 China

An ab initio calculations on the ground and low-lying excited statesX2∑＋,2^2∑＋,3^2∑＋,1^4∏,2^4∏,1^4∑＋,2^4∑＋,and 3^4∑＋of KBe molecule have been performed using multireference configuration interaction （MRCI） plus Davidsoncorrections （MRCI＋Q） approach with all electron basis set aug-cc-pCV5Z-DK for Be and def2-AQZVPP-JKFI for K.3^2∑＋,1^4∏,2^4∏,1^4∑＋,2^4∑＋and3^4∑＋states are investigated for the first time. Inner shell electron correlations are computed on the potential energy curves （PECs） calculations. The spectroscopic and molecular parameters are also predicted. In addition, The transition properties including transition dipole moment, Franck-Condon factors qv′v″, Einstein coefficients Av′v″, and the radiative lifetimesτ′for the2^2∑＋-X2∑＋,3^2∑＋-X2∑＋,and 2^4∏-1^4∏ transitions are predictedat the same time.

关键词： potential energy curves transition dipole moment Franck-Condon factors Einstein coefficients

Four distributed feedback laser array integrated with multimode-interference and semiconductor optical amplifier

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Chinese physics B 2013年第5期22卷 342-345页

作者：马丽朱洪亮梁松赵玲娟陈明华 Key Laboratory of Semiconductor Materials science Institute of SemiconductorsChinese Academy of Sciences Department of electronic Engineering Tsinghua University

Monolithic integration of four 1.55-μm-range InGaAsP/InP distributed feedback （DFB） lasers using varied ridge width with a 4 x 1-multimode-interference （MMI） optical combiner and a semiconductor optical amplifier （SOA） is demon- strated. The average output power and the threshold current are 1.8 mW and 35 mA, respectively, when the injection current of the SOA is 100 mA, with a side mode suppression ratio （SMSR） exceeding 40 dB. The four channels have a 1-nm average channel spacing and can operate separately or simultaneously.

关键词： distributed feedback laser array varied width ridge monolithic integration butt joint

Effect of hydrogen content on dielectric strength of the silicon nitride film deposited by ICP-CVD

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Chinese physics B 2021年第4期30卷 550-554页

作者： Yudong Zhang Jiale Tang Yongjie Hu Jie Yuan Lulu Guan Xingyu Li Hushan Cui Guanghui Ding Xinying Shi Kaidong Xu Shiwei Zhuang School of physics and electronic Engineering Jiangsu Normal UniversityXuzhou 221116China Jiangsu Leuven Instruments Co.Ltd Xuzhou 221300China

The inductively coupled plasma chemical vapor deposition(ICP-CVD) deposited silicon nitride(SiN_(x)) thin film was evaluated for its application as the electrical insulating film for a capacitor *** order to achieve highest possible dielectric strength of SiN_(x),the process parameters of ICP-CVD were carefully tuned to control hydrogen in SiN_(x) films by means of tuning N_(2)/SiH_(4) ratio and radio frequency(RF) *** electrical measurements,the hydrogen content in the films was measured by dynamic secondary ion mass spectrometry(D-SIMS).Fourier transform infrared spectroscopy(FTIR) and micro Raman spectroscopy were used to characterize the SiN_(x) films by measuring Si-H and N-H bonds’ *** was found that the more Si-H bonds lead to the higher dielectric strength.

关键词： dielectric strength silicon nitride film inductively coupled plasma chemical vapor deposition(ICP-CVD) hydrogen content

Experimental Investigation of Integrated Optical Intensive Impulse Electric Field Sensors

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Chinese physics Letters 2009年第2期26卷 157-159页

作者：孙豹陈福深 Key Lab of Broadband Optical Fiber Transmission and Communication Networks University of Electronic Science and Technology of China Chengdu 610054

We design and fabricate an integrated optical electric field sensor with segmented electrode for intensive impulse electric field measurement. The integrated optical sensor is based on a Mach-Zehnder interferometer with segmented electrodes. The output/input character of the sensing system is analysed and measured. The maximal detectable electric field range （-75 kV/m to 245kV/m） is obtained by analysing the results. As a result, the integrated optics electric field sensing system is suitable for transient intensive electric field measurement investigation.

关键词： field emission molybdenum dioxide enhancement factor

Single,composite,and ceramic Nd:YAG 946-nm lasers

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Chinese physics B 2015年第6期24卷 371-373页

作者：兰瑞君阳光王正平 School of Opto-electronic Information science and Technology Yantai University State Key Laboratory of Crystal Materials Shandong University

Single, composite crystal and ceramic continuous wave （CW） 946-nm Nd：YAG lasers are demonstrated, respectively. The ceramic laser behaves better than the crystal laser. With 5-mm long ceramic, a CW output power of 1.46 W is generated with an optical conversion efficiency of 13.9%, while the slope efficiency is 17.9%. The optimal ceramic length for a 946- nm laser is also calculated.

关键词： crystal laser ceramic laser thermal diffusion