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A dual-mode op.ical thermometer based on dual-excitation Bi^(3+),Sm^(3+)co-dop.d Y_(4)g.O_(8) p.osp.ors

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Journal of Rare Earths 2024年第8期42卷 1437-1446,I0002页

作者： Danyu Zhang.Yuxuan Luo Junyu Chen Lianjie Li Hai g.o department of physics Zhejiang Normal UniversityJinhua321004China

Dual-excitation and dual-emission Y_(4)g.O_(8):Bi^(3+),Sm^(3+)p.osp.ors were manufactured by traditional solidp.ase sintering.*** X-ray diffraction,morp.olog.,p.otoluminescence,energ. transfer p.ocess and temp.rature sensing.p.op.rties of Y_(4)g.O_(8):Bi^(3+),Sm^(3+)samp.es were comp.ehensively *** Y4g.O_(8):Bi^(3+),Sm^(3+)p.osp.ors exhibit characteristic emissions of Bi^(3+)(^(3)p.(1)→^(1)S_(0)) and Sm^(3+)(^(4)g.(5/2)→^(6)H)under both 290 and 347 nm *** fluorescence intensity ratio and Commission International de L'Eclairag. coordinates modes,Y_(4)g.O_(8):Bi^(3+),Sm^(3+)samp.es p.esent excellent temp.rature measurement *** maximum relative sensitivity(S_(r-max)) values of the former are 1.55%/K(460 K,290 nm excitation) and 0.82%/K(506 K,347 nm excitation).The S_(r-max)(x) values of the latter are 0.21 %/K(437 K,290 nm excitation) and 0.15%/K(513 K,347 nm excitation).These results illustrate that Y_(4)g.O_(8):Bi^(3+),Sm^(3+)p.osp.o rs can be used as a candidate material for a dual-mode op.ical thermometer under dual-excitation.

关键词： Dual-mode op.ical thermometer Luminescent p.op.rties Y_(4)g.O_(8):Bi^(3+) Sm^(3+)p.osp.ors Rare earths

Band structures of strained kag.me lattices

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Chinese physics B 2024年第2期33卷 456-463页

作者：徐露婷杨帆 Center for Joint Quantum Studies and department of physics School of ScienceTianjin UniversityTianjin 300354China Tianjin Key Laboratory of Low Dimensional Materials physics and p.ep.ring.Technolog. Department of PhysicsTianjin UniversityTianjin 300354China

Materials with kag.me lattices have attracted sig.ificant research attention due to their nontrivial features in energ. *** theoretically investig.te the evolution of electronic band structures of kag.me lattices in resp.nse to uniaxial strain using.both a tig.t-binding.model and an antidot model based on a p.riodic muffin-tin *** is found that the Dirac p.ints move with ap.lied ***,the flat band of unstrained kag.me lattices is found to develop.into a hig.ly anisotrop.c shap. under a stretching.strain along.y direction,forming.a p.rtially flat band with a reg.on disp.rsionless along.ky direction while disp.rsive along.kx *** results shed lig.t on the p.ssibility of eng.neering.the electronic band structures of kag.me materials by mechanical strain.

关键词： kag.me lattice strain band structure eng.neering

Assembly of functional carboxymethyl cellulose/p.lyethylene oxide/anatase TiO_(2) nanocomp.sites and tuning.the dielectric relaxation, op.ical, and p.otoluminescence p.rformances

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Journal of Semiconductors 2024年第7期45卷 26-38页

作者： Asmaa M.Ismail Abeer A.Reffaee Fawzy g.El Desouky Sp.ctroscop. department Physics Research InstituteNational Research CentreGizaCairo 12622Egypt Microwave physics and Dielectrics department National Research CentreDokkiCairoEgypt Solid State physics department Physics Research InstituteNational Research CentreGizaCairo 12622Egypt

Nanocomp.site films consisting.of carboxymethyl cellulose,p.lyethylene oxide(CMC/p.O),and anatase titanium diox-ide(TO)were p.oduced by the use of sol-g.l and solution casting.***2 nanocrystals were effectively incorp.rated into CMC/p.O p.lymers,as shown by X-ray diffraction(XRD)and attenuated total reflectance fourier transform infrared(ATR-FTIR)*** roug.ness g.owth is at hig. levels of TO nanocrystals(TO NCs),which means increasing.active sites and defects in CMC/*** differential scanning.calorimetry(DSC)thermog.ams,the chang. in g.ass transition temp.rature(Tg.val-ues verifies that the p.lymer blend interacts with TO *** increment p.op.rtions of TO NCs have a notable imp.ct on the dielectric p.rformances of the nanocomp.sites,as *** electrical p.op.rties of the CMC/p.O/TO nanocomp.site underg. sig.ificant *** nanocomp.site films exhibit a red alteration in the absorp.ion edg. as the concentration of TO NCs increases in the p.lymer *** decline in the energ. g.p.is readily ap.arent as the weig.t p.rcentag. of TO NCs *** p.otoluminescence(p.)emission sp.ctra indicate that the sites of the luminescence p.ak maximums show slig.t variation;p.aks g.t wider,while their intensities decrease dramatically as the concentration of TO *** nanocomp.site materials show p.tential for multifunctional ap.lications including.op.oelectronics,antireflection coating.,p.o-tocatalysis,lig.t emitting.diodes,and solid p.lymer electrolytes.

关键词： anatase TiO_(2) CMC/p.O nanocomp.sites op.ical p.otoluminescent electrical op.oelectronics

Electronic and thermoelectric p.op.rties of YbMg.(2)X_(2)(X=p.As,Sb,Bi)zintl comp.unds by first-p.incip.es method

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Journal of Rare Earths 2024年第1期42卷 147-154,I0006页

作者： Sajid Khan Dil Faraz Khan R.Neffati Tariq Usman Muhammad Waqar Ahsraf Shamim Khan Saeed Ullah Jan g.Murtaza department of physics University of Science&Technology BannuBannu28100Pakistan department of physics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Laboratoire de p.ysique de La Matiere Condensee Departement de PhysiqueFaculte des Sciences de TunisUniversite Tunis El ManarCampus Universitaire1060TunisTunisia department of physics Shaoxing UniversityShaoxing312000China department of Mathematics&Natural Sciences Prince Mohammad Bin Fahd UniversityAlkhobar31952Saudi Arabia Materials Modeling.Lab Department of PhysicsIslamia College Peshawar25120KhyberPakhtunkhwaPakistan

In this work the structural,electronic and thermoelectric p.op.rties of YbMg.(2)X_(2)(X=p.As,Sb,Bi)zintl comp.unds were investig.ted comp.ehensively using.first p.incip.es *** electronic p.op.rties were studied using.p.E g.A,TB-mBJ and hybrid(YS-p.E0)*** the structural p.rameters of op.imized structures are in harmonious ag.eement to the available *** band structure study illustrates that the titled materials manifest metallic and semi metallic nature using.p.E and TB-mBJ p.tentials while they show wide band g.p.semiconducting.behavior by following.hybrid(YS-p.E0)*** density of states(TDOS)and p.rtial density of states(p.OS)were also calculated to g.imp.e the contribution of orbitals of atoms in the formation of *** p.op.rties were studied by using.BoltzTrap. code emp.oyed to *** g.t enormous values of Seebeck coefficient(S),p.wer factor(p.)and thermoelectric fig.re of merit(ZT)for all the samp.es YbMg.(2)X_(2)(X=p.As,Sb,Bi),Moreover,the overwhelming.transp.rt p.op.rties for the titled comp.unds indicate the op.imum level of carriers’concentration which p.np.ints these materials to be better thermoelectrics in the 1-2-2 zintl family.

关键词： Zintl comp.unds Hybrid functional Band structure Thermoelectrics Rare earths

Investig.tion of p.oton structure function F_(2)^(p.at HERA in lig.t of an analytical solution to the Balitsky–Kovcheg.v equation

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Communications in Theoretical physics 2024年第3期76卷 120-126页

作者： Ranjan Saikia p.ag.an p.ukan Jayanta Kumar Sarma HEp.laboratory Department of PhysicsTezpur UniversityTezpurAssam-784028India department of physics Moran CollegeMoranhatAssam-785670India

In this p.p.r,the p.oton structure function F_(2)^(p.(x,Q^(2))at small-x is investig.ted using.an analytical solution to the Balitsky–Kovcheg.v(BK)*** the context of the color dip.le descrip.ion of deep.inelastic scattering.DIS),the structure function F_(2)^(p.(x,Q^(2))is comp.ted by ap.lying.the analytical exp.ession for the scattering.amp.itude N(k,Y)derived from the BK *** transverse momentum k and total rap.dity Y,the scattering.amp.itude N(k,Y)rep.esents the p.op.g.tion of the quark-antiquark dip.le in the color dip.le descrip.ion of *** the BK solution we extracted the integ.ated g.uon density xg.x,Q^(2))and then comp.red our theoretical estimation with the LHAp.F g.obal data fits,NNp.F3.1sx and ***,we have investig.ted the behavior of F_(2)^(p.(x,Q^(2))in the kinematic reg.on of 10^(-5)≤x≤10^(-2)and 2.5 g.V^(2)≤Q^(2)≤60 g.V^(2).Our p.edicted results for F_(2)^(p.(x,Q^(2))within the sp.cified kinematic reg.on are in g.od ag.eement with the recent hig.-p.ecision data for F_(2)^(p.(x,Q^(2))from HERA(H1 Collaboration)and the LHAp.F g.obal p.rametrization g.oup.NNp.F3.1sx.

关键词： quantum chromodynamics(QCD) p.rturbative QCD(p.CD) p.oton structure function small-x Balitsky-Kovcheg.v equation

Subnatural-linewidth fluorescent sing.e p.otons

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p.otonics Research 2024年第4期12卷 625-637页

作者： HE-BIN ZHANg.g.O-XIANg.LI YONg.CHUN LIU State Key Laboratory of Low-Dimensional Quantum physics Department of PhysicsTsinghua UniversityBeijing 100084China department of physics Huazhong Normal UniversityWuhan 430079China Frontier Science Center for Quantum Information Beijing 100084China

Subnatural-linewidth sing.e p.otons are of vital imp.rtance in quantum op.ics and quantum information *** to p.evious research, it ap.ears difficult to utilize resonance fluorescence to g.nerate sing.e p.otons with subnatural linewidth. Here we p.op.se a universally ap.licable ap.roach to g.nerate fluorescent sing.e p.otons with subnatural linewidth, which can be imp.emented based on Λ-shap. and similar energ. ***, the g.neral condition to obtain fluorescent sing.e p.otons with subnatural linewidth is *** sing.e-p.oton linewidth can be easily manip.lated over a broad rang. by external fields, which can be several orders of mag.itude smaller than the natural linewidth. Our study can be easily imp.emented in various p.ysical p.atforms with current exp.rimental techniques and will sig.ificantly facilitate the research on the quantum nature of resonance fluorescence and the technolog.es in quantum information science.

关键词： quantum utilize op.ics

Influence of cerium ions on structure-dep.ndent mag.etic p.op.rties of Ba-Sr M-typ. hexaferrite nanocrystals

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Journal of Rare Earths 2024年第2期42卷 364-372,I0005页

作者： Ram A.p.war Sunil M.p.tang. p.M.Dig.e Sher Sing. Meena Abdullah g.l-Sehemi Mehboobali p.nnip.ra Santosh S.Jadhav department of physics ArtsCommerce and Science CollegeAhmednagar413711MaharashtraIndia department of physics Shri Krishna MahavidyalayaGunjotiDistOsmanabad413606MaharashtraIndia p.dmashri Vikhe p.til Colleg. of Arts Science and CommercePravaranagarA/P.Loni(Kd)Tal.RahataDistAhmednagar413713MaharashtraIndia Solid State physics Division Bhabha Atomic Research CentreMumbai400085MaharashtraIndia department of Chemistry King Khalid UniversityAbha61413Saudi Arabia department of physics D.S.M's ArtsCommerce and Science CollegeJintur431509MaharashtraIndia

The p.esent study is a systematic effort to investig.te the structure-sensitive mag.etic p.rameters of Ce^(3+) substituted Ba-Sr hexaferrite nanocrystals chemically formulated as Ba_(0.5)Sr_(0.5)Ce_(x)Fe_(12-x)O_(19) where x=0.0-0.2 with Δx=*** hexaferrite p.wders were p.ep.red using.the sol-g.l self-ig.ition route and structurally characterized by means of p.wder X-ray diffraction and Fourier transform infrared *** creation of the M-typ. hexaferrite p.ase within the synthesized samp.es was revealed from the Rietveld refinement of the X-ray *** occurrence of a secondary p.ase of CeO_(2) was revealed within the hexaferrites for the substitution,x> *** refined X-ray diffraction data were utilized to comp.te the lattice p.rameters,X-ray density,and lattice p.rameter *** crystal structure p.otted from the refined XRD data reveals the occup.ncy of the ions at different lattice *** Xp. data of the hexaferrite were analyzed to confirm the oxidation states of the constituent *** nanocrystalline nature of the hexaferrites was revealed from the crystallite sizes calculated using.Scherer's *** analysis of FTIR sp.ctra confirms that only a fraction of Ce^(3+)accommodated in the lattice and the remaining.Ce content reside in the form of the CeO_(2) *** morp.olog. of the hexaferrites was analyzed from the FESEM p.ofiles of the ferrite *** mag.etic behavior study was p.rformed by analyzing.the Curie temp.rature,hysteresis loop.,and hyp.rfine interactions by means of suscep.ibility,V.S.M,and Mossbauer sp.ctroscop.,*** hexaferrites with increasing.coercivity,decreasing.saturation mag.etization,and decreasing.Curie temp.rature are rep.rted in the *** substituted Ce^(3+)ions inhibit the g.ain g.owth and create lattice imp.rfections g.ving.rise to hexaferrites with tuned mag.etic p.rameters suitable for different ap.lications.

关键词： Ba-Sr hexaferrite Ce^(3+)substitution Xp. Saturation mag.etization Coercivity M?ssbauer sp.ctroscop.

Quantum correlations and entang.ement in coup.ed op.omechanical resonators with p.oton hop.ing.via g.ussian interferometric p.wer analysis

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Chinese physics B 2024年第5期33卷 204-211页

作者： Y.Lahlou B.Maroufi M.Daoud Lp.E-MS Department of PhysicsFaculty of SciencesMohammed V UniversityRabatMorocco Lp.S Department of PhysicsFaculty of SciencesIbn Tofail UniversityKénitraMorocco

Quantum correlations that surp.ss entang.ement are of g.eat imp.rtance in the realms of quantum information p.ocessing.and quantum ***,for quantum systems p.ep.red in p.re states,it is difficult to differentiate between quantum entang.ement and quantum ***,this indisting.ishability is no long.r holds for mixed *** contribute to a better understanding.of this differentiation,we have exp.ored a simp.e model for both g.nerating.and measuring.these quantum *** study concerns two macroscop.c mechanical resonators p.aced in sep.rate Fabry–p.rot cavities,coup.ed throug. the p.oton hop.ing.*** system offers a comp.ehensively way to investig.te and quantify quantum correlations beyond entang.ement between these mechanical *** key ing.edient in analyzing.quantum correlation in this system is the g.obal covariance *** forms the basis for comp.ting.two essential metrics:the log.rithmic neg.tivity(E_(N)^(m))and the g.ussian interferometric p.wer(p.(g.^(m)).These metrics p.ovide the tools to measure the deg.ee of quantum entang.ement and quantum correlations,*** study reveals that the g.ussian interferometric p.wer(p.(g.^(m))p.oves to be a more suitable metric for characterizing.quantum correlations among.the mechanical modes in an op.omechanical quantum system,p.rticularly in scenarios featuring.resilient p.oton hop.ing.

关键词： quantum correlations entang.ement g.ussian interferometric p.wer log.rithmic neg.tivity op.omechanics p.oton hop.ing

Dissociation cross sections ofψ(3770),ψ(4040),ψ(4160),andψ(4415)mesons with nucleons

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Communications in Theoretical physics 2024年第4期76卷 93-112页

作者： Ruo-Qing.Ding.Xiao-Ming.Xu H J Weber department of physics Shanghai UniversityBaoshanShanghai 200444China department of physics University of VirginiaCharlottesvilleVA 22904United States of America

We study the dissociation of ψ(3770), ψ(4040), ψ(4160), and ψ(4415) mesons in collision with nucleons, which takes p.ace in hig.-energ. p.oton-nucleus collisions. The quark interchang. between a nucleon and a ■ meson leads to the dissociation of the ■ meson. We consider the reactions:■, and■, where R stands for ψ(3770), ψ(4040), ψ(4160), or ψ(4415). A reaction of a neutron and a ■ meson corresp.nds to a reaction of a p.oton and the ■ meson by rep.acing.the up.quark with the down quark and vice versa. Transition-amp.itude formulas are derived from the S-matrix *** cross sections are calculated with the transition amp.itudes for scattering.in the p.ior form and in the p.st form. The cross sections relate to nodes in the radial wave functions of ψ(3770), ψ(4040), ψ(4160), and ψ(4415) mesons.

关键词： inelastic nucleon-charmonium scattering quark interchang. relativistic constituent quark p.tential model