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Investigation of single event effect in 28-nm system-on-chip with multi patterns

Chinese physics B 2020年第10期29卷 573-577页

作者： Wei-Tao Yang Yong-Hong Li Ya-Xin Guo Hao-Yu Zhao Yang Li Pei Li Chao-Hui He Gang Guo Jie Liu Sheng-Sheng Yang Heng An School of Nuclear Science&Technology Xi'an Jiaotong UniversityXi'an 710049China National Innovation Center of Radiation Application China Institute of Atomic EnergyBeijing 102413China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Dipartimento di Automatica e Informatica Politecnico di TorinoTorino 10129Italy Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou Institute of PhysicsLanzhou 730000China

Single event effects (SEEs) in a 28-nm system-on-chip (SoC) were assessed using heavy ion irradiations, and susceptibilities in different processor configurations with data accessing patterns were investigated. The patterns included the sole processor (SP) and asymmetric multiprocessing (AMP) patterns with static and dynamic data accessing. Single event upset (SEU) cross sections in static accessing can be more than twice as high as those of the dynamic accessing, and processor configuration pattern is not a critical factor for the SEU cross sections. Cross section interval of upset events was evaluated and the soft error rates in aerospace environment were predicted for the SoC. The tests also indicated that ultra-high linear energy transfer (LET) particle can cause exception currents in the 28-nm SoC, and some even are lower than the normal case.

关键词： system-on-chip heavy ion single event effect

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Nevel Dual-Core Shell Structure Cds@Zns@Nis Counter Electrode for Remarkably Enhanced the Performance of Quantum Dot Sensitized Solar Cells

SSRN

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SSRN 2023年

作者： Fan, Rao Wang, Senyang Peng, Xueyan Wang, Zixin Zhang, Wenming Li, Ling Hebei Key Lab of Optic-electronic Information and Materials College of Physics Science and Technology Hebei Provincial Photovoltaic Technology Collaborative Innovation Center Hebei University Baoding071002 China

Quantum-dot-sensitized solar cell (QDSSCs) has been considered as an alternative to new generation photovoltaics, and rational design for counter electrodes are recently receiving much attention to increase the very low conversion efficiency. In this work, raspberry-like double-core shell CdS@ZnS@NiS material was prepared using a simple one-step hydrothermal method and coated uniformly on carbon nanofibers(CNFs). After grinding, it is scraped and coated on the titanium mesh base to prepare Zn⁃Cu⁃In⁃Se(ZCISe) quantum dot sensitized solar cell(QDSSCs) counter electrode material (CdS@ZnS@NiS/CNFs). The electrochemical test showed that the photoelectric conversion efficiency (PCE) of QDSSCs using CdS@ZnS@NiS/CNFs as counter electrode reached 9.72%, this result indicates the dual-core shell structure possesses better catalytic properties, which indicated that the raspberry-shaped double core shell CdS@ZnS@NiS is a feasible competitive as counter electrode material for QDSSCs. © 2023, The Authors. All rights reserved.

关键词： Cadmium sulfide

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Nevel Dual-Core Shell Structure Cds@Zns@Nis Counter Electrode for Remarkably Enhanced the Performance of Quantum Dot Sensitized Solar Cells

SSRN

引用

SSRN 2023年

作者： Fan, Rao Wang, Senyang Peng, Xueyan Wang, Zixin Li, Ling Hebei Key Lab of Optic-electronic Information and Materials College of Physics Science and Technology Hebei Provincial Photovoltaic Technology Collaborative Innovation Center Hebei University Baoding071002 China

关键词： Cadmium sulfide

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Proposal of a free-space-to-chip pipeline for transporting single atoms

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Physical Review A 2023年第3期108卷 033108-033108页

作者： Aiping Liu Jiawei Liu Zhanfei Kang Guang-Jie Chen Xin-Biao Xu Xifeng Ren Guang-Can Guo Qin Wang Chang-Ling Zou Institute of Quantum Information and Technology Nanjing University of Posts and Telecommunications Nanjing 210003 China Broadband Wireless Communication and Sensor Network Technology Key Lab of Ministry of Education Nanjing University of Posts and Telecommunications Nanjing 210003 China CAS Key Laboratory of Quantum Information University of Science and Technology of China Hefei 230026 China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Hefei 230026 China

A free-space-to-chip pipeline is proposed for the efficient transportation of single atoms from a magneto-optical trap to an on-chip evanescent-field trap. Due to the reflection of the dipole laser on the chip surface, the conventional conveyor-belt approach can transport only atoms in close proximity to the chip surface, with a distance of about one wavelength. This limitation hinders the efficient interaction between the atom and the on-chip waveguide devices. Here, a two-layer photonic chip architecture is proposed to realize a free-space-to-chip atom pipeline. By employing a diffraction beam of the integrated grating with an incident angle of the Brewster angle, the reflection of the dipole laser is suppressed, allowing the atoms to be brought to the chip surface with a distance of only 100nm. The pipeline is verified numerically and provides a reliable atom source for a hybrid photonic-atom chip.

关键词： Atom & ion trapping & guiding Integrated optics Interference & diffraction of light Light propagation, transmission & absorption Nanophotonics Polarization of light Atoms Trapped atoms Two-level models

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Synergistic CO_(2)reduction and tetracycline degradation by CuInZnS-Ti_(3)C_(2)T_(x)in one photoredox cycle

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Nano Research 2022年第9期15卷 8010-8018页

作者： Lijing Wang Zhan Zhang Renquan Guan Dandan Wu Weilong Shi Limin Yu Pan Li Wei Wei Zhao Zhao Zaicheng Sun Henan Engineering Center of New Energy Battery Materials Henan D&A Engineering Center of Advanced Battery MaterialsCollege of Chemistry and Chemical EngineeringInstitute of Architectural EngineeringShangqiu Normal UniversityShangqiu 476000China Faculty of Physics Faculty of ChemistryNortheast Normal UniversityChangchun 130024China Center of excellence for environmental safety and biological effects Beijing Key Lab for Green Catalysis and SeparationDepartment of Chemistry and Chemical EngineeringCollege of Environmental and Energy EngineeringBeijing University of TechnologyBeijing 100124China School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Optimizing photocatalytic CO_(2)reduction with simultaneous pollutant degradation is highly ***,the photocatalytic efficiency is restricted by the unmatched redox ability,high carriers’recombination rate,and lack of reactive sites of the present ***,the CuInZnS-Ti_(3)C_(2)T_(x)hybrid with matched redox ability and suitable CO_(2)adsorption property was rationally *** nucleation and growth process of CuInZnS was interfered by the addition of Ti_(3)C_(2)T_(x)with a negative charge,resulting in thinner nanosheets and richer reactive ***,the Schottky heterojunction built in the hybrid simultaneously improved the photoexcited charge transfer property,sunlight absorption range,and CO_(2)adsorption ***,upon exposure to sunlight,CuInZnS-Ti_(3)C_(2)T_(x)exhibited an efficient photocatalytic CO_(2)reduction performance(10.2μmol·h^(−1)·g^(−1))with synergetic tetracycline degradation,obviously higher than that of pure *** on the combination of theoretical calculation and experimental characterization,the photocatalytic mechanism was investigated *** work offers a reference for the remission of worldwide energy shortage and environmental pollution problems.

关键词： CuInZnS-Ti_(3)C_(2)T_(x) photocatalysis CO_(2)reduction tetracycline degradation

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Kinetically accelerated and high-mass loaded lithium storage enabled by atomic iron embedded carbon nanofibers

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Nano Research 2022年第7期15卷 6176-6183页

作者： Qian Xu Yanan Li Chenghao Wu Xitong Sun Qiang Li Huabin Zhang Le Yu Yuanyuan Pan Yujuan Wang Shiwei Guo Mengdi Zhang Han Hu Mingbo Wu State Key Laboratory of Heavy Oil Processing Institute of New EnergyCollege of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China College of Physics Center for Marine Observation and CommunicationsQingdao UniversityQingdao 266071China KAUST Catalysis Center(KCC) Physical Sciences and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Lab of Organic-Inorganic CompositesBeijing University of Chemical TechnologyBeijing 100029China

Carbonaceous materials represent the dominant choice of materials for anodic lithium storage in many energy storage ***,the nonpolar carbonaceous materials offer weak adsorption toward Li+that largely denies the high-rate Li+***,the atomic Fe sites decorated carbon nanofibers(AICNFs)facilely produced by electrospinning are reported for kinetically accelerated Li+*** calculation reveals that the atomic Fe sites possess coordination unsaturated electronic configuration,enabling suitable bonding energy and facilitated diffusion path of Li+.As a result,the optimal structure displays a high capacitive contribution up to 95.9%at a scan rate of 2.0 mV·s^(−1).In addition,ultrahigh capacity retention of 97%is afforded after 5,000 cycles at a current density of 3 A·g^(−1).Moreover,the interlaced fiber structure enabled by electrospinning benefits structural stability and improved conductivity even at thick electrodes,thus allowing a high areal capacity of 1.76 mAh·cm−2 at a loading of 8 mg·cm−*** of these structure and performance merits,the lithium-ion capacitor containing the AICNF-based anode delivers a high energy density and large power density.

关键词： atomic iron pseudocapacitance high-mass loading electrospinning lithium storage

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Pulsar glitch activities: the spin parameters approach

arXiv

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arXiv 2024年

作者： Eya, Innocent Okwudili Iyida, Evaristus Uzochukwu Physics/Electronics Technique Department of Science Laboratory Technology University of Nigeria Nsukka Nigeria Department of Physics and Astronomy University of Nigeria Nsukka Nigeria Astronomy and Astrophysics Research lab University of Nigeria Nsukka Nigeria

Glitch activity refers to the mean increase in pulsar spin frequency per year due to rotational glitches. It is an important tool for studying super-nuclear matter using neutron star interiors as templates. Glitch events are typically observed in the spin frequency (ν) and frequency derivative (ν) of pulsars. The rate of glitch recurrence decreases as the pulsar ages, and the activity parameter is usually measured by linear regression of cumulative glitches over a given period. This method is effective for pulsars with multiple regular glitch events. However, due to the scarcity of glitch events and the difficulty of monitoring all known pulsars, only a few have multiple records of glitch events. This limits the use of the activity parameter in studying neutron star interiors with multiple pulsars. In this study, we examined the relationship between the activity parameters and pulsar spin parameters (spin frequency, frequency derivative, and pulsar characteristic age). We found that a quadratic function provides a better fit for the relationship between activity parameters and spin parameters than the commonly used linear functions. Using this information, we were able to estimate the activity parameters of other pulsars that do not have records of glitches. Our analysis shows that the relationship between the estimated activity parameters and pulsar spin parameters is consistent with that of the observed activity parameters in the ensemble of pulsars. Copyright © 2024, The Authors. All rights reserved.

关键词： Pulsars

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Mirror real Chern insulator in two and three dimensions

arXiv

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arXiv 2024年

作者： Wang, Yang Cui, Chaoxi Zhang, Run-Wu Wang, Xiaotian Yu, Zhi-Ming Liu, Gui-Bin Yao, Yugui Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems School of Physics Beijing Institute of Technology Beijing100081 China School of Physical Science and Technology Southwest University Chongqing400715 China University of Wollongong Wollongong2500 Australia

A real Chern insulator (RCI) featuring a real Chern number and a second-order boundary mode appears in a two-dimensional (2D) system with the space-time inversion symmetry (PT ). Here, we propose a kind of RCI: mirror real Chern insulator (MRCI) which emerges from the system having additional horizontal mirror symmetry Mz. The MRCI generally is characterized by two independent real Chern numbers, respectively defined in the two mirror subsystems of the system. Hence, the MRCI may host the second-order boundary modes different from the conventional RCI. We show that for spinless systems, the definition of the MRCI is straightforward, as PT keeps each mirror subsystem invariant. For the spinful systems with both PT and Mz, the real Chern number for the total system remain well defined, as MzPT = C2zT, and (C2zT )2 = 1. However, since C2zT exchanges the two mirror subsystems, the definition of the MRCI in spinful systems requires the help of projective symmetry algebra. We also discuss the MRCIs in 3D systems, where the MRCI is defined on certain mirror-invariant 2D planes. Compared with its 2D counterpart, the 3D MRCI can exhibit more abundant physics when the systems have additional nonsymmorphic operators. Several concrete MRCI models including 2D and 3D, spinless and spinful models are constructed to further demonstrate our ideas. Copyright © 2024, The Authors. All rights reserved.

关键词： Mirrors

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Realization of algorithmic identification of cause and effect in quantum correlations

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Physical Review A 2024年第1期109卷 012406-012406页

作者： Zhao-An Wang Yu Meng Zheng-Hao Liu Yi-Tao Wang Shang Yu Wei Liu Zhi-Peng Li Yuan-Ze Yang Nai-Jie Guo Xiao-Dong Zeng Jian-Shun Tang Chuan-Feng Li Guang-Can Guo CAS Key Laboratory of Quantum Information University of Science and Technology of China Hefei 230026 China CAS Center For Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Hefei 230026 China Quantum Optics and Laser Science Blackett Laboratory Imperial College London Prince Consort Rd London SW7 2AZ United Kingdom Research Center for Quantum Sensing Zhejiang Lab Hangzhou 310000 People's Republic China Hefei National Laboratory University of Science and Technology of China Hefei 230088 China

Causal inference revealing causal dependencies between variables from empirical data has found applications in multiple subfields of scientific research. A quantum perspective of correlations holds the promise of overcoming the limitation of Reichenbach's principle and enabling causal inference with only observational data. However, it is still not clear how quantum causal inference can provide operational advantages in general cases. Here, we have devised a photonic setup and experimentally realized an algorithm capable of identifying any two-qubit statistical correlations generated by the two basic causal structures under an observational scenario, thus revealing a universal quantum advantage in causal inference over its classical counterpart. We further demonstrate the explainability and stability of our causal discovery method, which is widely sought in data processing algorithms. Employing a fully observational approach, our result paves the way for studying quantum causality in general settings.

关键词： Optical quantum information processing Optical tests of quantum theory Photon pairs & parametric down-conversion Quantum algorithms Quantum correlations in quantum information Quantum gates Quantum information processing

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Grain size control in quasi-two-dimensional perovskite thin film via intermediate phase engineering for efficient bound exciton generation

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science China Materials 2024年第12期67卷 3925-3931页

作者： Guohui Li Wenhui Zhao Kai Lin Kefan Zhao Yujing Wang Aohua Niu Rong Weng Kaibo Zheng Yanxia Cui College of Electronic Information and Optical Engineering Key Laboratory of Interface Science and Engineering in Advanced MaterialsKey Lab of Advanced Transducers and Intelligent Control System of Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China Chemical Physics Division and NanoLund Lund UniversityBox 12422100LundSweden

Quasi-two dimensional(2D)perovskites have emerged as a promising class of materials due to their remarkable photoluminescence efficiency,which stems from their exceptionally high exciton binding *** spatial confinement of excitons within smaller grain sizes could enhance the formation of biexcitons leading to higher radiative recombination ***,the synthesis of high-quality quasi-2D perovskite thin films with controllable grain sizes remains a challenging *** this study,we present a facile method for achieving quasi-2D perovskite thin films with controllable grain sizes ranging from 500 to 900 *** is accomplished by intermediate phase engineering during the film fabrication *** results demonstrate that quasi-2D perovskite films with smaller grain sizes exhibit more efficient bound exciton generation and a reduced stimulated emission threshold down to 15.89µJ cm^(−2).Furthermore,femtosecond transient absorption measurements reveal that the decay time of bound excitons is shorter in quasi-2D perovskites with smaller grain sizes compared to that of those with larger grains at the same pump density,which is 230.5 *** observation suggests a more efficient exciton recombination process in the smaller grain size *** findings would offer a promising approach for the development of efficient bound exciton lasers.

关键词： quasi-2D perovskite intermediate phase engineering bound exciton generation grain size control

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