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Superconducting properties and topological nodal lines features in centrosymmetric Sn_(0.5)TaSe_(2)

Nano Research 2021年第8期14卷 2613-2619页

作者： mukhtar ladam Zhanfeng Liu Oyawale A.Moses Xiaojun Wu Li Song National Synchrotron Radiation Laboratory CAS Center for Excellence in NanoscienceCAS Key Laboratory of Strongly Coupled Quantum Matter PhysicsUniversity of Science and Technology of ChinaHefei 230029China Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy ConversionSynergetic Innovation of Quantum Information&Quantum TechnologySchool of Chemistry and Materials Sciencesand CAS Center for Excellence in NanoscienceUniversity of Science and Technology of ChinaHefei 230026China Physics Department Bayero UniversityKano 700231Nigeria

Nontrivial topological behaviors in superconducting materials provide resourceful ground for the emergence and study of unconventional quantum *** doping by the controlled intercalation of donor atoms is an efficient route for enhancing/inducement of superconducting and topological behaviors in layered topological insulators and ***,we enhanced the superconducting temperature of TaSe_(2) by 20-folds(~3 K)through Sn atoms *** first-principles calculations,we demonstrated the existence of nontrivial topological ***_(0.5)TaSe_(2) displays topological nodal lines around the K high symmetry point in the Brillouin zone,with drumhead-like shaped surface states protected by inversion ***,the coexistence of these properties makes Sn_(0.5)TaSe_(2) a potential candidate for topological superconductivity.

关键词： superconductivity topological semimetal charge doping intercalation first-principles single-crystals

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A vectorial model for the nonlinear gradient force exerted on metallic Rayleigh nanoparticles

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Chinese Optics Letters 2024年第2期22卷 207-213页

作者：朱政张聿全闵长俊 Aurèle J.ladam H.Paul Urbach 袁小聪 Research Center for Humanoid Sensing Research Institute of Intelligent SensingZhejiang LabHangzhou 311100China Nanophotonics Research Center Institute of Microscale Optoelectronics&State Key Laboratory of Radio Frequency Heterogeneous IntegrationShenzhen UniversityShenzhen 518060China Optics Research Group ImPhys DepartmentFaculty of Applied SciencesDelft University of TechnologyDelft 2628 CJThe Netherlands

Optical tweezers have proved to be a powerful tool with a wide range of *** gradient force plays a vital role in the stable optical trapping of *** scalar method is convenient and effective for analyzing the gradient force in traditional optical ***,when the third-order nonlinear effect of the nano-object is stimulated,the scalar method cannot adequately present the optical response of the metal nanoparticle to the external optical ***,we propose a theoretical model to interpret the nonlinear gradient force using the vector *** combining the optical Kerr effect,the polarizability vector of the metallic nanoparticle is derived.A quantitative analysis is obtained for the gradient force as well as for the optical potential *** vector method yields better agreement with reported experimental *** suggest that this method could lead to a deeper understanding of the physics relevant to nonlinear optical trapping and binding phenomena.

关键词： gradient forces nonlinear effect metallic nanoparticles

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