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Polarization control of above-threshold ionization spectrum in elliptically polarized two-color laser fields

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Chinese physics B 2024年第4期33卷 136-144页

作者：金发成杨慧慧宋晓红李飞杜玲玲薛红杰魏丽敏白悦刘浩翔王兵兵杨玮枫 Faculty of science Xi'an Aeronautical InstituteXi'an 710077China School of physics and Optoelectronic Engineering Hainan UniversityHaikou 570288China Center for Theoretical physics Hainan UniversityHaikou 570288China Laboratory of Optical physics Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China College of science Shantou UniversityShantou 515063China University of Chinese Academy of sciences Beijing 100049China

We study the above-threshold ionization(ATI)process of atoms exposed to fundamental and high-frequency lasers with arbitrary ellipticity by applying the frequency-domain *** is found that the angular-resolved ATI spectrum is sensitive to ellipticities of two lasers and emitted angles of the *** for the photon energy of the highfrequency laser more than atomic ionization potential,the width of plateau tends to a constant with increasing ellipticity of fundamental field,the dip structure disappears with increasing ellipticity of the high-frequency *** the help of the quantum channel analysis,it is shown that the angular distribution depends mainly on the ellipticity of high-frequency field in the case that its frequency is ***,one can see that the maximal and minimal energies in quantum numerical results are in good agreement with the classical *** investigation may provide theoretical support for experimental research on polarization control of ionization in elliptically polarized two-color laser fields.

关键词： above-threshold ionization two-color laser polarization control

Surface-induced interaction of colloidal particles in isotropic liquid crystals

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Communications in Theoretical physics 2024年第7期76卷 114-122页

作者： Hualing Zhang Kaifeng Weng Rui Ma department of physics College of Physical Science and TechnologyXiamen UniversityXiamen 361005China Fujian Provincial Key Laboratory for Soft Functional materials Research Research Institute for Biomimetics and Soft MatterXiamen UniversityXiamen 361005China

In this work,we study the interaction between two colloidal particles in a liquid crystal that is in the isotropic *** interaction is caused by surface-induced polarization of the liquid crystal molecules in the vicinity of the *** find that the interaction is short-ranged in both 2D and 3D *** symmetric homeotropic anchoring conditions,the interaction is *** under anti-symmetric homeotropic anchoring conditions,the interaction is repulsive at short distances but attractive at intermediate *** particle size has a strong impact on the effective interaction force.

关键词： surface-induced interaction colloidal particles liquid crystals

Function-reversible facets enabling SrTiO_(3)nanocrystals for improved photocatalytic hydrogen evolution

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Frontiers in Energy 2024年第1期18卷 101-109页

作者： Bin WANG Bei AN Xiaoqian LI Shaohua SHEN School of physics Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter(Ministry of Education)Key Laboratory of Shaanxi for Advanced Materials and Mesoscopic PhysicsXi’an Jiaotong UniversityXi’an 710049China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi’an Jiaotong UniversityXi’an 710049China

It has been widely reported that,for faceted nanocrystals,the two adjacent facets with different band levels contribute to promoted charge separation,and provide active sites for photocatalytic reduction and oxidation reaction,*** such cases,only one family of facets can be used for photocatalytic hydrogen ***,by using SrTiO_(3)nanocrystals enclosed by{023}and{001}facets as a model photocatalyst,this paper proposed a strategy to achieve the full-facets-utilization of the nanocrystals for photocatalytic hydrogen via chemically depositing Pt nanoparticles on all *** photo-deposition experiment of CdS provided direct evidence to demonstrate that the{023}facets which were responsible for photooxidation reaction can be function-reversed for photocatalytic hydrogen evolution after depositing Pt nanoparticles,together with the{001}***,the full-facets-utilization led to a much-improved activity for photocatalytic hydrogen,in contrast to those SrTiO_(3)nanocrystals with only{001}facets deposited by Pt nanoparticles via a photo-deposition method.

关键词： SrTiO_(3)nanocrystals crystal facets photocatalysis hydrogen evolution

Regulating the conductance of tungsten diselenide by oxygen plasma and improving its electrical stability by encapsulation

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Nano Research 2024年第4期17卷 3253-3260页

作者： Zhaofang Cheng Shaodan He Shimin Zhang Shijun Duan Min Wang Ziyu Liu Rong Zhang Wenya Qiang Xudong Zhang Minggang Xia MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of condensed matter School of PhysicsXi’an Jiaotong UniversityXi’an 710049China department of Applied physics School of PhysicsXi’an Jiaotong UniversityXi’an 710049China Shaanxi Province Key Laboratory of Quantum Information and Optoelectronic Quantum Devices School of PhysicsXi’an Jiaotong UniversityXi’an 710049China

Two-dimensional(2D)tungsten selenide(WSe_(2))is promising candidate material for future electronic applications,owing to its potential for ultimate device *** improving the electronic performance of WSe_(2)-based field-effect transistors(FETs),the modification of surface properties is *** this study,the seamless structural phase transition in WSe_(2) lattice is achieved by soft oxygen plasma,regulating the electrical conductance of WSe_(2)-based *** found that during the soft oxygen plasma treatment with optimal processing time,the generated oxygen ions can substitute some selenium atoms and thus locally modify the bond length,inducing 2H→1T phase transition in WSe_(2) with seamless *** mosaic structures have been proven to tailor the electronic structure and increase the hole carrier concentration inside WSe_(2),significantly increasing the channel conductance of WSe_(2) *** the further increase of the oxygen plasma treatment time,the creation of more selenium vacancy defects leads to the electronic doping,resulting in the reduction of *** from the hexagonal boron nitride(h-BN)encapsulation to interrupt the partial structural relaxation from 1T to 2H phase,our WSe_(2) FET exhibits high electronic stability with conductance of 6.8×10^(-4) S,which is about four orders of magnitude higher than 2H WSe_(2)(5.8×10^(-8) S).This study could further broaden the WSe_(2) FETs in applications for functionalization and integration in electronics.

关键词： tungsten selenide(WSe2) structural phase transition oxygen plasma conductance hexagonal boron nitride(h-BN)encapsulation

Negative magnetoresistance in the antiferromagnetic semimetal V_(1/3)TaS_(2)

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Chinese physics B 2024年第3期33卷 567-571页

作者：王子彭馨张胜男苏亚慧赖少东周旋吴春翔周霆宇王杭栋杨金虎陈斌翟会飞吴泉生杜建华焦志伟方明虎 department of physics China Jiliang UniversityHangzhou 310018China Beijing National Laboratory for condensed matter physics and Institute of physics Chinese Academy of SciencesBeijing 100190China department of physics Zhejiang UniversityHangzhou 310027China department of physics Hangzhou Normal UniversityHangzhou 310036China University of Chinese Academy of sciences Beijing 100049China Collaborative Innovation Center of Advanced Microstructure Nanjing 210093China

Intercalated transition metal dichalcogenides(TMDCs)attract much attention due to their rich properties and potential *** this article,we grew successfully high-quality V_(1/3)TaS_(2) crystals by a vapor transport *** measured the magnetization,longitudinal resistivityρxx(T,H),Hall resistivityρxy(T,H),as well as performed calculations of the electronic band *** was found that V_(1/3)TaS_(2) is an A-type antiferromagnet with the Neel temperature T_(N)=6.20 K,and exhibits a negative magnetoresistance(MR)near T_(N).Both band structure calculations and Hall resistivity measurements demonstrated it is a magnetic semimetal.

关键词： magnetoresistance antiferromagnetic semimetal band structure

Bethe ansatz solutions of the 1D extended Hubbard-model

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Communications in Theoretical physics 2024年第4期76卷 43-50页

作者：侯海洋孙佩乔艺许小甜张鑫杨涛 Institute of Modern physics Northwest UniversityXian 710127China Shaanxi Key Laboratory for Theoretical physics Frontiers Xian 710127China Beijing National Laboratory for condensed matter Institute of physics Chinese Academy of SciencesBeijing 100190China

We construct an integrable 1D extended Hubbard model within the framework of the quantum inverse scattering *** the help of the nested algebraic Bethe ansatz method,the eigenvalue Hamiltonian problem is solved by a se... 详细信息

关键词： quantum integrable system Bethe ansatz T-Q relation Hubbard model

Highly selective growth of(6,5)single-walled carbon nanotubes from sigma phase alloy catalyst

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Nano Research 2024年第3期17卷 1999-2003页

作者： Liantao Xin Chen Ma Qianru Wu Shaokang Liu Linhai Li Xiuyun Zhang Liu Qian Maoshuai He Dong Li Fangqian Han Shulan Hao Lihu Feng Yahan Li Huaping Liu Lili Zhang Chang Liu Jin Zhang College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042China Shenyang National Laboratory for materials science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Beijing National Laboratory for condensed matter physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China College of physics science and Technology Yangzhou UniversityYangzhou 225002China Center for Nanochemistry Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

The chirality structure of a single-walled carbon nanotube(SWNT)strongly depends on the composition of catalyst used in the chemical vapor deposition *** this study,we develop a porous magnesia supported manganese-rhenium(MnRe/MgO)catalyst for chirality-selective synthesis of *** characterizations reveal that(6,5)tubes with a selectivity higher than 70%are grown from the Re-rich MnRe/MgO *** comparing the SWNT growth results with those of monometallic Mn or Re,the formation of sigma phase,an intermetallic compound occurring in transition-metal alloy systems,is revealed to be crucial for the dominant synthesis of(6,5)*** work not only extends the application of sigma phase alloy for catalytic synthesis of SWNTs,but also sheds lights on the growth of SWNTs with a high chirality selectivity.

关键词： single-walled carbon nanotubes sigma phase manganese-rhenium catalyst selective growth transition-metal alloy

High-Performance Inverted Perovskite Solar Cells with Sol-Gel-Processed Sliver-Doped NiOx Hole Transporting Layer

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Energy & Environmental materials 2024年第4期7卷 205-214页

作者： Haibin Wang Zhiyin Qin Xinjian Li Chun Zhao Chao Liang School of Advanced Technology Xi'an Jiaotong-Liverpool University department of Electrical Engineering and Electronics University of Liverpool School of Humanities and Social sciences Xi'an Jiaotong-Liverpool University Key Laboratory of materials physics of Ministry of Education School of Physics and Microelectronics Zhengzhou University MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of condensed matter School of Physics National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology Xi'an Jiaotong University

Nickel oxide （NiOx） has been established as a highly efficient and stable holetransporting layer （HTL） in perovskite solar cells （PSCs）.However,existing deposition methods for NiOxhave been restricted by high-vacuum processes and fail to address the energy level mismatch at the NiOx/perovskite interface,which has impeded the development of PSCs.

关键词： Ag-NiOX/NiOX hole transporting layer inverted perovskite solar cells

Generation and characterization of customized Laguerre–Gaussian beams with arbitrary profiles

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Frontiers of physics 2024年第4期19卷 235-241页

作者： Chengyuan Wang Yun Chen Jinwen Wang Xin Yang Hong Gao Fuli Li Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of condensed matter Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic DevicesSchool of PhysicsXi’an Jiaotong UniversityXi’an 710049China department of physics Huzhou UniversityHuzhou 313000China

We experimentally demonstrate the generation of customized Laguerre–Gaussian(LG)beams whose intensity maxima are localized around any desired *** principle is to act with appropriate algebraic functions on the angular spectra of LG *** characterize the propagation properties of these beams and compare them with non-diffraction caustic beams possessing the same intensity *** results manifest that the customized-LG beams can maintain their profiles during propagation and suffer less energy loss than the non-diffraction caustic beams,and hence are able to propagate a longer ***,the customized-LG beam exhibits self-healing ability when parts of their bodies are *** new structure beam has potential applications in areas such as optical communication,soliton routing and steering,and optical tweezing.

关键词： light manipulation wave propagation invariant optical fields