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High-Temperature Anomalous Metal States in Iron-Based Interface Superconductors

Physical Review Letters 2024年第22期132卷 226003-226003页

作者： Yanan Li Haiwen Liu Haoran Ji Chengcheng Ji Shichao Qi Xiaotong Jiao Wenfeng Dong Yi Sun Wenhao Zhang Zihan Cui Minghu Pan Nitin Samarth Lili Wang X. C. Xie Qi-Kun Xue Yi Liu Jian Wang International Center for Quantum Materials School of Physics Peking University Beijing 100871 China Department of Physics The Pennsylvania State University University Park Pennsylvania 16802 USA Center for Advanced Quantum Studies Department of Physics Beijing Normal University Beijing 100875 China Hefei National Laboratory Hefei 230088 China State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics Tsinghua University Beijing 100084 China School of Physics and Information Technology Shaanxi Normal University Xi’an 710119 China School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan 430074 China Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices Renmin University of China Beijing 100872 China Collaborative Innovation Center of Quantum Matter Beijing 100871 China Institute for Nanoelectronic Devices and Quantum Computing Fudan University Shanghai 200433 China Southern University of Science and Technology Shenzhen 518055 China Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education) Renmin University of China Beijing 100872 China

The nature of the anomalous metal state has been a major puzzle in condensed matter physics for more than three decades. Here, we report systematic investigation and modulation of the anomalous metal states in high-temperature interface superconductor FeSe films on SrTiO3 substrate. Remarkably, under zero magnetic field, the anomalous metal state persists up to 20 K in pristine FeSe films, an exceptionally high temperature standing out from previous observations. In stark contrast, for the FeSe films with nanohole arrays, the characteristic temperature of the anomalous metal state is considerably reduced. We demonstrate that the observed anomalous metal states originate from the quantum tunneling of vortices adjusted by the Ohmic dissipation. Our work offers a perspective for understanding the origin and modulation of the anomalous metal states in two-dimensional bosonic systems.

关键词： Superconductivity Transport phenomena Crystalline systems Thin films Cryogenics Molecular beam epitaxy Resistivity measurements

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Symbiotic evolution of photonics and artificial intelligence: a comprehensive review

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Advanced Photonics 2025年第02期 8-85页

作者： Fu Feng Dewang Huo Ziyang Zhang Yijie Lou Shengyao Wang Zhijuan Gu Dong-Sheng Liu Xinhui Duan Daqian Wang Xiaowei Liu Ji Qi Shaoliang Yu Qingyang Du Guangyong Chen Cuicui Lu Yu Yu Xifeng Ren Xiaocong Yuan Zhejiang Lab Research Center for Frontier Fundamental Studies Westlake Institute for Optoelectronics Zhejiang Key Laboratory of 3D Micro/Nano Fabrication and Characterization Beijing Institute of Technology School of Physics Center for Interdisciplinary Science of Optical Quantum and NEMS Integration Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems Huazhong University of Science and Technology Wuhan National Laboratory for Optoelectronics University of Science and Technology of China CAS Key Laboratory of Quantum Information University of Science and Technology of China CAS Center for Excellence in Quantum Information and Quantum Physics Zhejiang Lab Research Center for Life Sciences Computing

The rapid advancement of artificial intelligence(AI) has significantly impacted photonics, creating a symbiotic relationship that accelerates the development and applications of both fields. From the perspective of AI aiding photonics, deep-learning methods and various intelligent algorithms have been developed for designing complex photonic structures, where traditional design approaches fall short. AI's capability to process and analyze large data sets has enabled the discovery of novel materials, such as for photovoltaics,leading to enhanced light absorption and efficiency. AI is also significantly transforming the field of optical imaging with improved performance. In addition, AI-driven techniques have revolutionized optical communication systems by optimizing signal processing and enhancing the bandwidth and reliability of data transmission. Conversely, the contribution of photonics to AI is equally profound. Photonic technologies offer unparalleled advantages in the development of AI hardware, providing solutions to overcome the bottlenecks of electronic systems. The implementation of photonic neural networks, leveraging the high speed and parallelism of optical computing, demonstrates significant improvements in the processing speed and energy efficiency of AI computations. Furthermore, advancements in optical sensors and imaging technologies not only enrich AI applications with high-quality data but also expand the capabilities of AI in fields such as autonomous vehicles and medical imaging. We provide comprehensive knowledge and a detailed analysis of the current state of the art, addressing both challenges and opportunities at the intersection of AI and photonics. The multifaceted interactions between AI and photonics will be explored, illustrating how AI has become an indispensable tool in the development of photonics and how photonics, in turn,facilitates advancements in AI. Through a collection of case studies and examples, we underscore the potential

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Local probe of the interlayer coupling strength of few-layers SnSe by contact-resonance atomic force microscopy

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Frontiers of physics 2020年第6期15卷 105-113页

作者： Zhi-Yue Zheng Yu-Hao Pan Teng-Fei Pei Rui Xu Kun-Qi Xu Le Lei Sabir Hussain Xiao-Jun Liu Li-Hong Bao Hong-Jun Gao Wei Ji Zhi-Hai Cheng State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-nano Devices Department of PhysicsRenmin University of ChinaBeijing 100872China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Key Laboratory of Inorganic Functional Materials and Devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nano science and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China China North Vehicle Research Institute BeijingChina

The interlayer bonding in two-dimensional(2D)materials is particularly important because it is not only related to their physical and chemical stability but also afects their mechanical,thermal,elec-tronic,optical,and other *** address this issue,we report the direct characterization of the interlayer bonding in 2D SnSe using contact-resonance atomic force microscopy(CR-AFM)*** ***-specific CR spectroscopy and CR force spectroscopy measurements are performed on both SnSe and its supporting SiO2/Si substrate *** on the cantilever and contact mechanic models,the contact stifness and vertical Young's modulus are evaluated in comparison with SiO2/Si as a reference *** interlayer bonding of SnSe is further analyzed in combination with the semi-analytical model and density functional theory *** direct characteriza-tion of interlayer interactions using this non-destructive methodology of CR-AFM would facilitate a better understanding of the physical and chemical properties of 2D layered materials,specifically for interlayer intercalation and vertical heterostructures.

关键词： 2D materials interlayer bonding contact-resonance atomic force microscopy density functional theory

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One-Step Laser-Induced Dissolvable PVA Mask for 3D Soft Carbon Electrode Array

One-Step Laser-Induced Dissolvable PVA Mask for 3D Soft Carb...

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IEEE International Conference on micro Electro Mechanical systems

作者： Xuanqi Wang Kai Xue Ruiyu Bai Ye Huang Zimo Zhang Xiaoli You Minghao Wang Honglong Chang Bowen Ji Unmanned System Research Institute Northwestern Polytechnical University China National Key Laboratory of Unmanned Aerial Vehicle Technology Integrated Research and Development Platform of Unmanned Aerial Vehicle Technology Northwestern Polytechnical University China Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace School of Mechanical Engineering Northwestern Polytechnical University China Sanhang Institute for Brain Science and Technology Northwestern Polytechnical University China Institute of Medical Research Northwestern Polytechnical University China MOE Engineering Research Center of Smart Microsensors and Microsystems College of Electronics and Information Hangzhou Dianzi University China

ISBN: (数字)9798331508890

ISBN: (纸本)9798331508906

This paper introduces a 3D soft carbon electrode array, fabricated through a one-step laser-induced process integrating a water-dissolvable polyvinyl alcohol (PVA) mask. This approach achieves precise conical microstructures and robust conductive channels using hybrid MWCNT@PDMS conductive paste. The soft carbon electrode sites with a 3D conical microstructure are designed to enhance proximity to neural tissue, thereby enhancing electrocorticogram (ECoG) signal quality and enabling effective neural stimulation. The electrode array demonstrates remarkable stretchability (25% over 1,000 cycles without failure) and stability (equivalent to 66 days in vivo). Compared to conventional materials, our electrodes exhibit superior electrochemical properties, including lower impedance (9.7 kΩ at 1 kHz) and higher signal-to-noise ratio (SNR, 61.7 dB). Thus, this one-step process is a cost-effective, scalable solution for recording and modulating central or peripheral neural tissues.

关键词： Electrodes micromechanical devices Three-dimensional displays Array signal processing Laser stability Recording microstructure Carbon Laser beam cutting Signal to noise ratio

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Quantization of the band at the surface of charge density wave material 2H-TaSe_(2)

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Chinese Physics B 2021年第4期30卷 106-112页

作者： Man Li Nan Xu Jianfeng Zhang Rui Lou Ming Shi Lijun Li Hechang Lei Cedomir Petrovic Zhonghao Liu Kai Liu Yaobo Huang Shancai Wang Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices Renmin University of ChinaBeijing 100872China Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201204China Institute of Advanced Studies Wuhan UniversityWuhan 430072China Swiss Light Source Paul Scherrer InstituteCH-5232 VilligenSwitzerland Chongqing Technology and Busineee University Chongqing 400067China Condensed Matter Physics and Materials Science Department Brookhaven National LaboratoryUptonNY 11973USA State Key Laboratory of Functional Materials for Informatics and Center for Excellence in Superconducting Electronics SIMITChinese Academy of SciencesShanghai 200050China

By using angle-resolvea photoemission spectroscopy(ARPES) combined with the first-principies electronic structure calculations,we report the quantized states at the surface of a single crystal 2 H-TaSe_(2).We have observed sub-bands of quantized states at the three-dimensional Brillouin zone center due to a highly dispersive band with light effective mass along k_(z) *** quantized sub-bands shift upward towards E_(F) while the bulk band at Γ shifts downward with the decrease of temperature across charge density wave(CDW) *** band shifts could be intimately related to the *** neither the two-dimensional Fermi-surface nesting nor purely strong electron-phonon coupling can explain the mechanism of CDW in 2 H-TaSe_(2),our experiment may ignite the interest in understanding the CDW mechanism in this family.

关键词： angle-resolved photoemission spectroscopy transition metal dichalcogenide TaSe_(2)

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Surface,Size and Thermal Effects in Alkali Metal with Core-Electron Binding-Energy Shifts

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Chinese Journal of Chemical Physics 2021年第5期34卷 628-638,I0003,I0004页

作者： Wen-huan Zhu Zhong-kai Huang Mao-lin Bo Jin Huang Cheng Peng Hai Liu National Key Laboratory of Science and Technology on Micro/Nano Fabrication Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Inorganic Special Functional Materials of Chongqing Yangtze Nromal UniversityChongqing 408100China Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing Yangtze Normal UniversityChongqing 408100China School of Chemistry and Chemical Engineering Southwest UniversityChongqing 400715China Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai UniversityShanghai 200072China

Consistency between density functional theory calculations and X-ray photoelectron spectroscopy measurements confirms our predications on the undercoordination-induced local bond relaxation and core level shift of alkali metal,which determine the surface,size and thermal properties of ***-resolved photoelectron spectroscopyanalysis method and bond order-length-strength theory can be utilized to quantify the physical parameters regarding bonding identities and electronic property of metal surfaces,which allows for the study of the core-electron binding-energy shifts in alkali *** employing these methods and first principle calculation in this work,we can obtain the information of bond and atomic cohesive energy of under-coordinated atoms at the alkali metal *** addition,the effect of size and temperature towards the binding-energy in the surface region can be seen from the view point of Hamiltonian perturbation by atomic relaxation with atomic bonding.

关键词： Alkali metal First principle calculation Metal surface Binding-energy Size effect Thermal effect

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Flexible, Multi-Shank Stacked Array for High-Density Omini-Directional Intracortical Recording

Flexible, Multi-Shank Stacked Array for High-Density Omini-D...

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IEEE International Conference on micro Electro Mechanical systems

作者： Zhejun Guo Longchun Wang Bowen Ji Ye Xi Bin Yang Jingquan Liu National Key Laboratory of Science and Technology on Micro/Nano Fabrication Shanghai Jiao Tong University China Unmanned System Research Institute Northwestern Polytechnical University Xi'an China

ISBN: (数字)9781665419123

ISBN: (纸本)9781665430241

This paper presents a flexible multi-shanks omini-directional neural probe array. The flexible probe includes eight shanks with different length, each shank contains 128 recording sites. Traditional Multilayer lithography is applied to fabricate the probe and a novel stacked structure is design with four-sided electrodes (32 sites on surface and 96 sites on sidewall) is proposed in this multi-shank array, which increases the electrode density of integration and the stacked structure can be readily scaled up to 1024 channels. It has been proved that the impedance at 1 kHz of the electrodes on the surface and the sidewalls are 830 kΩ and 1.1 MΩ in vitro respectively. With such design, longer life span can be achieved and the probe can capture richer neural signal. In addition, a method of microwire assisted implantation is proposed to ensure successful implantation in agar model.

关键词： Electrodes micromechanical devices Surface impedance Reliability Impedance Probes In vitro

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microstructure and Mechanical Performance Study of Crmnfeconi High-Entropy Alloys after Cryogenic Treatment

SSRN

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SSRN 2023年

作者： Qin, Yulin Wu, Changgui Long, Xiaojiang Qiu, Wenbin Zhou, Lvjun Tang, Jiafeng Zhang, Ning Yin, Ming Chen, Longqing Zhu, Jun College of Physics Sichuan University Sichuan Chengdu610065 China Kunming Metallurgical Research Institute Co. Ltd Yunnan Kunming650031 China Key Laboratory of Micro Nano Optoelectronic Devices and Intelligent Perception Systems Yangtze Normal University Chongqing Fuling408100 China Department of Fundamental Courses Wuxi Institute of Technology Wuxi214121 China Key Laboratory of Radiation Physics and Technology Ministry of Education Institute of Nuclear Science and Technology Sichuan University Chengdu610064 China School of Mechanical Engineering Sichuan University Chengdu610064 China

In recent years, significant progress has been made in the development of high-entropy alloys (HEAs) that possess both high strength and high ductility. The application of the metastable engineering strategy to enhance the strength and ductility of materials has also gradually been employed, and cryogenic treatment is one of the important techniques in this regard. Through cryogenic liquid nitrogen treatment, this study significantly enhanced the strength and ductility of (CrMnFeCoNi)45Fe55 and (CrMnFeCoNi)40Fe60 HEAs prepared by laser melting deposition (LMD). Compared to the initial samples, the fracture strength of (CrMnFeCoNi)45Fe55 increased from 480 MPa (at room temperature) to 980 MPa (after cryogenic treatment), and the fracture elongation alloy increased from 60% (at room temperature) to 62% (after cryogenic treatment). The fracture strength of (CrMnFeCoNi)40Fe60 alloy increased from 550 MPa (at room temperature) to 1150 MPa (after cryogenic treatment), and the fracture strength decreased from 55% (at room temperature) to 45% (after cryogenic treatment). This is attributed to the fact that cryogenic liquid nitrogen treatment reduces the stacking fault energy of the alloy system, facilitating the formation of stacking faults. The formation of stacking faults, in turn, provides nucleation sites for phase transformations, promoting the transformation of the matrix from face-centered cubic (FCC) phase to body-centered cubic (BCC) phase or other phases. This activates phase transformation-induced plasticity effects (TRIP). Simultaneously, the bidirectional coexistence mechanism achieves a favorable balance between strength and ductility. This provides a new ideas and method for obtaining high-entropy alloys with excellent comprehensive mechanical properties. © 2023, The Authors. All rights reserved.

关键词： microstructure

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Exceptional-Surface- Tailored Robust microlaser

Exceptional-Surface- Tailored Robust Microlaser

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Conference on Lasers and Electro-Optics (CLEO)

作者： Kun Liao Yangguang Zhong Zhuochen Du Guodong Liu Chentong Li Xianxin Wu Chunhua Deng Cuicui Lu Xingyuan Wang Che Ting Chan Qinghai Song Shufeng Wang Xinfeng Liu Xiaoyong Hu Qihuang Gong Department of Physics State Key Laboratory for Mesoscopic Physics Collaborative Innovation Center of Quantum Matter Beijing Academy of Quantum Information Sciences Nano-optoelectronics Frontier Center of Ministry of Education Peking University Beijing China CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing China State Key Laboratory on Tunable laser Technology Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Harbin Institute of Technology (Shenzhen) Shenzhen China Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems School of Physics Beijing Institute of Technology Beijing China College of Mathematics and Physics Beijing University of Chemical Technology Beijing China Department of Physics The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan Shanxi China Peking University Yangtze Delta Institute of Optoelectronics Nantong Jiangsu China

We report a scalable strategy to realize a robust on-chip integrated microlaser source with simultaneous in-plane emission, linewidth compression, and pump energy utilization improvement based on different orders of e... 详细信息

ISBN: (纸本)9798350369311

关键词： Lasers and electrooptics system-on-chip Pump lasers Electro-optical waveguides

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Scaling Solar Photocatalytic Hydrogen Production in China: Integrated Geospatial-Meteorological Analysis

SSRN

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SSRN 2024年

作者： Li, Yinan Li, Lanyu Yuan, Hongkuan He, Keji Chen, Hong Xie, Jianping Wang, Biao Wang, Xiaonan School of Physical Science and Technology Southwest University Chongqing400715 China Department of Chemical and Biomolecular Engineering National University of Singapore Singapore117585 Singapore Department of Chemical Engineering Tsinghua University Beijing100084 China China Oilfield Services Limited Yanjiao065201 China Center for Research on Intelligent Perception and Computing National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences Beijing100190 China School of Artificial Intelligence University of Chinese Academy of Sciences Beijing101408 China School of Resources and Environment Institute of Fundamental and Frontier Science University of Electronic Science and Technology of China Chengdu611731 China Chongqing key Laboratory of Micro Nano Structure Optoelectronics School of Physical Science and Technology Southwest University Chongqing400715 China

Solar photocatalytic hydrogen production is considered a promising technology owing to its sustainable nature, while facing the challenges of improving and maintaining photocatalytic efficiency under prolonged variable weather conditions. Herein, we screen out the MoTe2/ZrS2 system with a theoretical solar-to-hydrogen conversion efficiency of 10.37%. To improve the actual efficiency among all 97,711 grid cells in China, we propose an original meteorological data-driven machine learning model to optimize photocatalytic H2 production and results show that the annual average STH efficiency gives a mean of 3.16% within a range of 0.44% – 4.91% . Incorporating geospatial data, we determine that China's photocatalytic H2 potential is about 216.65 Mt/year, which has been improved by almost sixfold compared to that without optimization, and the country’s 2060 hydrogen demand can be met by using 11.08% of its total land area. Compared with photovoltaic electrolysis, a photocatalyst cost of 23 USD/m2cat/103hrs would make photocatalysis economically competitive. Last, considering hydrogen production fluctuations, we explore optimal operation of hydrogen storage and utilization facilities to fulfil downstream demands. © 2024, The Authors. All rights reserved.

关键词： Hydrogen production

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