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Chinese Physics B 2008年第7期17卷 2670-2677页

作者：张存喜聂一行梁九卿 Department of Physics and Institute of Theoretical Physics Shanxi University Department of Physics Yanbei Normal Institute

We have investigated theoretically the field-driven electron-transport through a double-quantum-well semiconductor-heterostructure with spin-orbit coupling. The numerical results demonstrate that the transmission spectra are divided into two sets due to the bound-state level-splitting and each set contains two asymmetric resonance peaks which may be selectively suppressed by changing the difference in phase between two driving fields. When the phase difference changes from 0 to π, the dip of asymmetric resonance shifts from one side of resonance peak to the other side and the asymmetric Fano resonance degenerates into the symmetric Breit-Wigner resonance at a critical value of phase difference. Within a given range of incident electron energy, the spin polarization of transmission current is completely governed by the phase difference which may be used to realize the tunable spin filtering.

关键词： Fano effect Floquet channel spin-orbit coupling

Field-assisted spin-polarized electron transport through a single quantum well with spin-orbit coupling

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Chinese Physics B 2012年第3期21卷 389-394页

作者：丁秀欢张存喜王瑞周运清孔令民 Department of Mathematics Zhejiang Ocean University Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Department of Physics Zhejiang Ocean University

We have investigated theoretically the field-driven electron transport through a single-quantum-well semiconductor heterostructure with spin-orbit coupling. The splitting of the asymmetric Fano-type resonance peaks due to the Dresselhaus spin-orbit coupling is found to be highly sensitive to the direction of the incident electron. The splitting of the Fano-type resonance induces the spin-polarization dependent electron current. The location and the line shape of the Fano-type resonance can be controlled by adjusting the energy and the direction of the incident electron, the oscillation frequency, and the amplitude of the external field. These interesting features may be used to devise tunable spin filters and realize pure spin transmission currents.

关键词： Fano resonance Floquet channel spin-orbit coupling

spinor F=1 Bose-Einstein condensates loaded in two types of radially-periodic potentials with spin-orbit coupling

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Chinese Physics B 2021年第10期30卷 442-446页

作者：王继国李月晴唐翰昭宋亚飞 Department of Mathematics and Physics Shijiazhuang TieDao UniversityShijiazhuang 050043China Institute of Applied Physics Shijiazhuang TieDao UniversityShijiazhuang 050043China

We consider two-dimensional spinor F=1 Bose-Einstein condensates in two types of radially-periodic potentials with spin-orbit coupling,i.e.,spin-independent and spin-dependent radially-periodic *** the Bose-Einstein condensates in a spin-independent radially-periodic potential,the density of each component exhibits the periodic density modulation along the azimuthal direction,which realizes the necklacelike state in the ferromagnetic Bose-Einstein *** the spin-exchange interaction increases,the necklacelike state gradually transition to the plane wave phase for the antiferromagnetic Bose-Einstein condensates with larger spin-orbit *** competition of the spin-dependent radially-periodic potential,spin-orbit coupling,and spin-exchange interaction gives rise to the exotic ground-state phases when the Bose-Einstein condensates in a spin-dependent radially-periodic potential.

关键词： spinor Bose-Einstein condensates spin-orbit coupling radially-periodic potential

Ground state of rotating ultracold quantum gases with anisotropic spin orbit coupling and concentrically coupled annular potential

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Chinese Physics B 2014年第7期23卷 288-292页

作者：王鑫谭仁兵杜志静赵文宇张晓斐张首刚 Key Laboratory of Time and Frequency Primary Standards National Time Service CenterChinese Academy of Sciences University of Chinese Academy of Sciences Department of Physics School of Mathematics and PhysicsChongqing University of Science and Technology

MotiVated by recent experimental realization of synthetic spin-orbit coupling in neutral quantum gases, we consider the quasi-two-dimensional rotating two-component Bose-Einstein condensates with anisotropic Rashba spin-orbit cou- pling subject to concentrically coupled annular potential. For experimentally feasible parameters, the rotating condensate exhibits a variety of rich ground state structures by varying the strengths of the spin-orbit coupling and rotational frequency. Moreover, the phase transitions between different ground state phases induced by the anisotropic spin-orbit coupling are obviously different from the isotropic one.

关键词： Bose-Einstein condensate spin-orbit coupling quantum phase transition

Self-trapping under two-dimensional spin-orbit coupling and spatially growing repulsive nonlinearity

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Frontiers of physics 2018年第4期13卷 259-274页

作者： Rong-Xuan Zhong Zhao-Pin Chen Chun-Qing Huang Zhi-Huan Luo Hai-Shu Tan Boris A. Malomed Yong-Yao Li School of Physics and Optoelectronic Engineering Foshan University Foshan 528000 China Department of Physical Electronics School of Electrical Engineering Faculty of Engineering Tel Aviv University Tel Aviv 69978 Israel College of Electronic Engineering South China Agricultural University Guangzhou 510642 China ITMO University St. Petersburg 197101 Russia

We develop a method for creating two- and one-dimensional （2D and 1D） self-trapped modes in bi- nary spin-orbit-coupled Bose-Einstein condensates with the contact repulsive interaction, whose local strength grows sufficiently rapidly from the center to the periphery. In particular, an exact semi-vortex （SV） solution is found for the anti-Gaussian radial modulation profile. The exact modes are included in the numerically produced family of SV solitons. Other families, in the form of mixed modes （MMs）, as well as excited states of SVs and MMs, are also produced. Although the excited states are unstable in all previously studied models, they are partially stable in the present one. In the 1D version of the system, exact solutions for the counterpart of SVs, namely, semi-dipole solitons, are also found. Families of semi-dipoles, as well as the 1D version of MMs, are produced numerically.

关键词： spin-orbit coupling semi-vortex mixed mode excited states

Substrate dependent spin-orbit coupling in hybrid perovskite thin films

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Substrate dependent spin-orbit coupling in hybrid perovskite...

Negative tunnelling magnetoresistance in spin filtering magnetic junctions with spin-orbit coupling

第二届全国太阳能电池材料与器件大会

作者：张琦 Haomiao.Yu 北京交通大学 Key Laboratory of Luminescence and Optical Information Ministry of Education School of Science Beijing Jiaotong University

Solution processable hybrid metal halide perovskites pave the necessary condition for the development of flexible perovskite solar cells(PSCs)[1–3]. This paper reports the substrate effects on the spin-orbit coupling(SOC) in perovskite films through thermal expansion under thermal annealing. XRD measurements show that using flexible Polyethylene Naphthalate(PEN) substrate introduces a smaller mechanical strain in perovskite MAPbI3-xClx films, as compared to conventional glass substrate. Interestingly, our linear/circular photoexcitation modulated photocurrent studies found that decreasing mechanical strain gives rise to a weaker orbit-orbit interaction towards decreasing the SOC in the MAPbI3-xClx films prepared on flexible PEN substrate relative to rigid glass substrate. Simultaneously, decreasing the mechanical strain causes a reduction on the internal magnetic parameter inside the MAPbI3-xClx films, providing further evidence to show that introducing mechanical strain can affect the SOC in hybrid perovskite films upon using flexible substrate towards developing flexible perovskite thin film devices. Furthermore, our thermal admittance spectroscopy indicates that the trap states are increased in the perovskite films prepared on flexible PEN substrate as compared to glass substrate. Consequently, PEN and rigid glass substrates lead to shorter and longer photoluminescence lifetimes, respectively. Clearly, our findings provide an insightful understanding on substrate effects of optoelectronic properties in flexible perovskite thin film devices.

关键词： hybrid perovskites spin-orbit coupling substrates strain

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Chinese Physics B 2011年第5期20卷 367-372页

作者：李云 Department of Materials Science and Engineering Yunnan University Department of Chemistry KAIST373-1 Guseong-dongYuseong-guDaejeon 305-701Republic of Korea Department of Chemistry Seoul National UniversitySeoul 151-747Republic of Korea

We present theoretical calculations of spin transport in spin filtering magnetic tunnelling junctions based on the Landauer-Buttiker formalism and taking into account the spin-orbit coupling(SOC).It is shown that spin-flip scattering induced by SOC is stronger in parallel alignment of magnetization of the ferromegnet barrier(FB) and the ferromagnetic electrode than that in antiparallel *** increase of negative tunnelling magnetoresistance with bias is in agreement with recent experimental observation.

关键词： tunnelling magnetoresistance spin filtering barrier magnetic tunnelling junctions spin-orbit coupling

Entanglement beating in free space through spin–orbit coupling

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Light(Science & Applications) 2018年第1期7卷 1040-1046页

作者： Eileen Otte Carmelo Rosales-Guzmán Bienvenu Ndagano Cornelia Denz Andrew Forbes Institute of Applied Physics University of MuensterMuenster D-48149Germany School of Physics University of the WitwatersrandWits 2050South Africa

It is well known that the entanglement of a quantum state is invariant under local unitary *** rule dictates,for example,that the entanglement of internal degrees of freedom of a photon remains invariant during free-space ***,we outline a scenario in which this paradigm does not *** local Bell states engineered from classical vector vortex beams with non-separable degrees of freedom,the so-called classically entangled states,we demonstrate that the entanglement evolves during propagation,oscillating between maximally entangled(purely vector)and product states(purely scalar).We outline the spin–orbit interaction behind these novel propagation dynamics and confirm the results experimentally,demonstrating spin–orbit coupling in paraxial *** demonstration highlights a hitherto unnoticed property of classical entanglement and simultaneously offers a device for the on-demand delivery of vector states to targets,for example,for dynamic laser materials processing,switchable resolution within stimulated emission depletion(STED)systems,and a tractor beam for entanglement.

关键词： classical entanglement complex light fields entanglement oscillation spin-orbit coupling

Absence of a transport signature of spin-orbit coupling in graphene with indium adatoms

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Absence of a transport signature of spin-orbit coupling in g...

Twisted Phosphors that Violate Kasha's Exciton Model in Organic Systems

中国真空学会2014学术年会

作者：贾振钊燕宝明牛晶晶韩琪朱瑞俞大鹏吴孝松人工微结构和介观物理国家重点实验室量子物质科学协同创新中心

Enhancement of the spin-orbit coupling in graphene may lead to various topological phenomena and also find applications in *** absorption has been proposed as an effective way to achieve the *** particular,great hope has been held for indium in strengthening the spin-orbit coupling and realizing the quantum spin Hall effect[1,2].To search for evidence of the spin-orbit coupling in graphene absorbed with indium adatoms,we carry out extensive transport measurements,i.e.,weak localization magnetoresistance,quantum Hall effect and non-local spin Hall *** signature of the spin-orbit coupling is *** explanations are discussed.

关键词： graphene spin-orbit coupling weak-localization quantum Hall effect spin Hall effect

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Chinese Journal of Chemistry 2024年第11期42卷 1237-1246页

作者： Boyi Fu Guangming Wang Jiuyang Li Junbo Li Xun Li Xiaoya Zhao Shuhui Ding Guoping Yan Qianqian Yan Kaka Zhang School of Materials Science and Engineering Wuhan Institute of TechnologyWuhanHubei430205 China Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences345 Lingling RoadShanghai200032 China

Kasha's exciton model proposes that T1 energy levels of organic compounds are insensitive to molecular aggregation and microenvironment change because of negligible small transition dipole moments of T1 *** model holds true in most organic systems till *** we report the fabrication of twisted organic phosphors with intramolecular charge transfer characters and flexible molecular *** doped into different organic matrices,the twisted phosphor adopts different conformation,exhibits distinct phosphorescence colors and T1 energy levels,which violates Kasha's exciton model in organic *** that the change of phosphorescence colors and maxima can be readily distinguished by human eyes and conventional instrument,the twisted phosphors would be exploited as a new type of molecular probe,which would exhibit potential application in optical sensing and stimuli-responsive systems.

关键词： Afterglow Twisted phosphor Triplet excited state Room-temperature phosphorescence Luminescence spin-orbit coupling