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Vacancy-Type Defects in Thin HfO2 Layers Probed by Monoenergetic Positron Beams

Vacancy-Type Defects in Thin HfO2 Layers Probed by Monoenerg...

Joint e-Manufacturing and Design Collaboration Symposium (eMDC) & International Symposium on Semiconductor Manufacturing (ISSM)

作者： Akira Uedono Kazuya Kawakami Tatsunori Kuribara Ryu Hasunuma Yosuke Harashima Yasuteru Shigeta Zeyuan Ni Ruolin Yan Hideo Nakamura Akira Notake Tsuyoshi Moriya Koji Michishio Shoji Ishibashi Faculty of Pure and Applied Science University of Tsukuba Tsukuba Ibaraki Japan Graduate School of Science and Technology Nara Institute of Science and Technology Ikoma Nara Japan S-Technology Development Center Tokyo Electron Technology Solutions Ltd. Nirasaki Yamanashi Japan Development Department 1 Tokyo Electron Technology Solutions Ltd. Nirasaki Yamanashi Japan Digital Design Center Tokyo Electron Ltd. Sapporo Hokkaido Japan Software and Data Engineering Division Tokyo Electron Technology Solutions Ltd. Nirasaki Yamanashi Japan Research Institute for Measurement and Analytical Instrumentation National Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki Japan Research Center for Computational Design of Advanced Functional Materials National Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki Japan

ISBN: (数字)9798331510589

ISBN: (纸本)9798331510596

Behaviors of vacancies during the amorphous-to-crystalline transition of thin HfO 2 layers were studied by monoenergetic positron beams. The HfO 2 layers with 4‒30 nm thickness were fabricated on TiN/Si templates by atomic layer deposition technique. The major vacancy-type defects in the layers were identified as (i) Hf vacancies (V Hf ) coupled with oxygen vacancies (V O s) and (ii) vacancy clusters. After annealing at 500°C, the concentration of vacancy clusters increased, which was attributed to the agglomeration of intrinsic open spaces in the amorphous phase upon the phase transition from amorphous to crystalline phases. The phase transition started near the interface between the HfO 2 layer and bottom electrodes (TiN). After the crystallization, the concentration of vacancy clusters decreased as the annealing temperature increased.

关键词： Electrodes Annealing Atomic layer deposition Positrons Crystallization Tin Semiconductor device manufacture Hafnium compounds

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Intrinsic dipole moment on the capped carbon nanotubes

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Physical Review B 2009年第15期80卷 153413-153413页

作者： Minoru Otani Susumu Okada Yasuharu Okamoto Research Institute for Computational Sciences (RICS) National Institute of Advanced Industrial Science and Technology (AIST) Umezono 1-1-1 Tsukuba 305-8568 Japan Center for Computational Sciences and Graduate School of Pure and Applied Sciences University of Tsukuba Tsukuba 305-8571 Japan CREST Japan Science and Technology Agency 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan Nano Electronics Research Laboratories NEC Corporation Tsukuba 305-8501 Japan

Local atomic geometry and dimensionality of the nanoscale material consisting of carbon atoms with threefold coordination are crucial for determining their electronic properties. Due to the local electronic structure difference between the pentagonal and hexagonal C sites, the capped carbon nanotubes are found to possess an intrinsic dipole moment of 3.5 debye around their cap region. Our first-principle total-energy calculations clearly indicate that mixed dimensionality of the capped nanotube results in the charge transfer from the nanotube to the cap region. This is a mechanism of the electron polarization of materials. Furthermore the results corroborate the importance of the interplay between the electronic and geometric structures in nanoscale materials.

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On viscosity solutions of space-fractional diffusion equations of Caputo type

arXiv

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arXiv 2019年

作者： Namba, Tokinaga Rybka, Piotr Mathematical Science & Technology Research Laboratory Advanced Technology Research Laboratories Research & Development Nippon Steel Corporation 20-1 Shintomi Futtsu Chiba293-8511 Japan Institute of Applied Mathematics and Mechanics Warsaw University ul. Banacha 2 Warsaw02-097 Poland

We study a fractional diffusion problem in the divergence form in one space dimension. We define a notion of the viscosity solution. We prove existence of viscosity solutions to the fractional diffusion problem with the Dirichlet boundary values by Perron’s method. Their uniqueness follows from a proper maximum principle. We also show a stability result and basic regularity of solutions. Copyright © 2019, The Authors. All rights reserved.

关键词： Viscosity

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Retraction notice to “Prediction of the interaction between HIV viruses and Human Serum Albumin (HSA) molecules using an equilibrium dynamics simulation program for application in bio medical science” [J. Mol. Liq. 318 (2020) 113989]

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Journal of Molecular Liquids 2025年 430卷

作者： Aliakbar Karimipour Arash Karimipour Nitasha Adavoodi Jolfaei Maboud Hekmatifar Davood Toghraie Roozbeh Sabetvand Sara Rostami Institute of Research and Development Duy Tan University Da Nang 550000 Vietnam Department of Mechanical Engineering Najafabad Branch Islamic Azad University Najafabad Iran PES College of Pharmacy 50 Feet Road Hanumanth Nagar BSK 1 Stage Bangaluru Karnataka 560050 India Department of Mechanical Engineering Khomeinishahr Branch Islamic Azad University Khomeinishahr Iran Department of Energy Engineering and Physics Faculty of Condensed Matter Physics Amirkabir University of Technology Tehran Iran Laboratory of Magnetism and Magnetic Materials Advanced Institute of Materials Science Ton Duc Thang University Ho Chi Minh City Vietnam Faculty of Applied Sciences Ton Duc Thang University Ho Chi Minh City Vietnam

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Ab initio procedure for constructing effective models of correlated materials with entangled band structure

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Physical Review B 2009年第15期80卷 155134-155134页

作者： Takashi Miyake Ferdi Aryasetiawan Masatoshi Imada Research Institute for Computational Sciences AIST Tsukuba 305-8568 Japan Japan Science and Technology Agency CREST Kawaguchi 332-0012 Japan Graduate School of Advanced Integration Science Chiba University Chiba 263-8522 Japan Department of Applied Physics University of Tokyo Hongo Tokyo 113-8656 Japan

In a previous work [Phys. Rev. B 77, 085122 (2008)], a procedure for constructing low-energy models of electrons in solids was proposed. The procedure starts with dividing the Hilbert space into two subspaces: the low-energy part (“d space”) and the rest of the space (“r space”). The low-energy model is constructed for the d space by eliminating the degrees of freedom of the r space. The thus derived model contains the strength of electron correlation expressed by a partially screened Coulomb interaction, calculated in the constrained random-phase approximation (cRPA), where screening channels within the d space, Pd, are subtracted. One conceptual problem of this established downfolding method is that for entangled bands it is not clear how to cut out the d space and how to distinguish Pd from the total polarization. Here, we propose a simple procedure to overcome this difficulty. The d space is defined to be an isolated set of bands generated from a set of maximally localized Wannier basis, which consequently defines Pd. The r subspace is constructed as the complementary space orthogonal to the d subspace, resulting in two sets of completely disentangled bands. Using these disentangled bands, the effective parameters of the d space are uniquely determined by the cRPA method. The method is successfully applied to 3d transition metals.

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Comparative analysis of different classifiers on eeg signals for predicting epileptic seizure 2nd

Comparative analysis of different classifiers on eeg signals...

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2nd International Conference on Trends in computational and Cognitive Engineering, TCCE 2020

作者： Sharma, M.K. Ray, K. Yupapin, P. Kaiser, M.S. Ong, C.T. Ali, J. Amity School of Engineering and Technology Amity University Rajasthan Kant Kalwar NH11-C Delhi Highway JaipurRajasthan303002 India Amity School of Applied Sciences Amity University Kant Kalwar NH11-C Delhi Highway JaipurRajasthan303002 India Computational Optics Research Group Advanced Institute of Materials Science Ton Duc Thang University District 7 Ho Chi Minh City Viet Nam Division of Computational Physics Institute for Computational Science Ton Duc Thang University Ho Chi Minh City700000 Viet Nam Institute of Information Tech. Jahangirnagar University Dhaka Bangladesh Department of Mathematical Sciences Faculty of Science Universiti Teknologi Malaysia UTM Skudai Johor Bahru81310 Malaysia Faculty of Science Institute of Advance Photonic Science Universiti Teknologi Malaysia Johor Bahru Malaysia

ISBN: (纸本)9789813346727

Epilepsy is a neurological disease that’s characterized by perennial seizures. In this neurological condition the transient electrical phenomenon within the brain occurs that produces an amendment in sensation, awareness, and behavior of an individuals that leads to risk. To understand the brain behavior Electroencephalogram (EEG) signals are used in six different sub-bands viz. Alpha (α ), Beta (β ), Gamma1 (γ 1), Gamma2 (γ 2), Theta (θ ) and Delta (δ ). The Brainstorm software is used for visualizing, analyzing and filtration of EEG signals in each sub-band. This paper deals with the extraction of the various features in each sub-bands and different Machine Learning classifiers were used on these extracted features for comparative analysis in terms of Accuracy, prediction Speed and training time in MatLab. The various statistical and spectral methods are applied on EEG signals to obtained the distinct features in each sub-band. After compared these classifiers on the performance *** have 8 best classifier trained Models that were utilized in checking effectiveness to clearly distinguish between Epileptic and Normal cases. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Electroencephalography

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Genome assembly and transcriptome analysis provide insights into the antischistosome mechanism of Microtus fortis

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Journal of Genetics and Genomics 2020年第12期47卷 743-755页

作者： Hong Li Zhen Wang Shumei Chai Xiong Bai Guohui Ding Yuanyuan Li Junyi Li Qingyu Xiao Benpeng Miao Weili Lin Jie Feng Mingyue Huang Cheng Gao Bin Li Wei Hu Jiaojiao Lin Zhiqiang Fu Jianyun Xie Yixue Li Bio-Med Big Data Center CAS Key Laboratory of Computational BiologyShanghai Institute of Nutrition and HealthUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031China Shanghai Veterinary Research Institute Chinese Academy of Agricultural SciencesKey Laboratory of Animal ParasitologyMinistry of AgricultureShanghai 200241China Shanghai Laboratory Animal Research Center Shanghai 201203China Institute for Digital Health International Human Phenome Institutes(Shanghai)Shanghai 200433China Shanghai Center for Bioinformation Technology Shanghai Academy of Science and TechnologyShanghai 201203China School of Computer Science and Technology Harbin Institute of Technology(Shenzhen)ShenzhenGuangdong 518055China Shanghai Institute of Immunology Department of Immunology and MicrobiologyShanghai JiaoTong University School of MedicineShanghai 200025China State Key Laboratory of Genetic Engineering Ministry of Education Key Laboratory of Contemporary AnthropologyCollaborative Innovation Center for Genetics and DevelopmentSchool of Life SciencesFudan UniversityShanghai 200438China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhouZhejiang 330106China

Microtus fortis is the only mammalian host that exhibits intrinsic resistance against Schistosoma japonicum ***,the underlying molecular mechanisms of this resistance are not yet ***,we perform the first de novo genome assembly of ***,comprehensive gene annotation analysis,and evolution ***,we compare the recovery rate of schistosomes,pathological changes,and liver transcriptomes between *** and mice at different time points after *** observe that the time and type of immune response in *** are different from those in *** activates immune and inflammatory responses on the 10th day post infection,such as leukocyte extravasation,antibody activation,Fc-gamma receptor-mediated phagocytosis,and the interferon signaling cascade,which play important roles in preventing the development of *** contrast,an intense immune response occurrs in mice at the late stages of infection and could not eliminate *** mice suffer severe pathological injury and continuous decreases in cell cycle,lipid metabolism,and other *** findings offer new insights into the intrinsic resistance mechanism of *** against schistosome *** genome sequence also provides the basis for future studies of other important traits in ***.

关键词： Genome assembly Microtus fortis Schistosome Immune Transcriptome

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Structural, dc electrical resistivity and magnetic investigation of Mg, Ni, and Zn substituted Co-Cu nano spinel ferrites

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South African Journal of Chemical Engineering 2022年 42卷 106-114页

作者： Parajuli, D. Murali, N. Rao, A. Venkateswara Ramakrishna, A. S, Yonatan Mulushoa Samatha, K. Research Center for Applied Science and Technology Tribhuvan University KTM Nepal Department of Physics Tri-Chandra Multiple Campus KTM Ghantaghar Nepal Department of Engineering Physics AUCE (A) Andhra University A.P Visakhapatnam India Advanced Functional Materials Research Centre Department of Physics Koneru Lakshmaiah Education Foundation Andhra Pradesh Guntur 522502 India Department of ECE Aditya College of Engineering & Technology Surampalem Kakinada A. P. India Jawaharlal Nehru Technological University Kakinada East Godavari District A. P. India Department of Physics College of Natural and Computational Science Wolkite University Wolkite Ethiopia Department of Physics Andhra University A.P Visakhapatnam India

The sol-gel auto-combustion procedure was used to synthesize M (M = Mg, Ni, and Zn) substituted Co0.5Cu0.2M0.3Fe2O4 micro ferrites. X-ray diffraction measurements validated the mono-phase formation and nanocrystalline... 详细信息

The sol-gel auto-combustion procedure was used to synthesize M (M = Mg, Ni, and Zn) substituted Co_0.5Cu_0.2M_0.3Fe₂O₄ micro ferrites. X-ray diffraction measurements validated the mono-phase formation and nanocrystalline character of the produced samples. It possesses a monophasic cubic-spinel lattice structure with an average crystallite size ranging from 29.01 to 47.17 nm. The lattice constant determined by XRD analysis falls between 8.374 and 8.474 Å. The morphological characteristics were shown using FESEM analysis, which revealed the almost spherical form of grains with sizes ranging from 40, 50, and 74 nm. The compositional verification was undertaken with the help of the EDS analysis which ensured the presence of elements in desired proportions. IR spectra confirm their spinel spectra with the help of the two absorption bands lying between 1200 and 400 cm⁻¹ resembling their two sites: tetrahedral and octahedral. The magnetic saturation (M_S), magnetic moment (M)_R, and coercivity (H_c) are found to be the highest for the Ni substituted Co-Cu ferrite system, i.e., M_S = 49.5 emu/g. The ratio M_R/M_S for all ferrites is less than 0.5 indicating their ferromagnetic isotropic nature thereby acting as magnetic semiconductors. The electrical properties were measured using the ‘two probe technique’ with varying temperatures which indicates their semiconducting nature. Ni substituted Co-Cu nanoferrite is preferable for electromagnets and recording purposes the magnetic and electrical behavior of Ni substituted Co-Cu nanoferrite shows its relevance for recording and electromagnetic applications. © 2022 The Authors

关键词： Co-Cu ferrites DC resistivity FTIR Magnetic semiconductors XRD

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Infrared and Raman spectra of ABC-stacked few-layer graphene studied by first-principles calculations

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Physical Review B 2011年第24期84卷 245433-245433页

作者： Yuehua Xu Xiaowei Li San-Huang Ke Key Laboratory of Advanced Microstructured Materials MOE Department of Physics Tongji University 1239 Siping Road Shanghai 200092 China Center for Applied Physics and Technology Peking University Beijing 100871 China Beijing Computational Science Research Center 3 Heqing Road Beijing 100084 China

The infrared (IR) absorption spectra and resonant Raman spectra of ABC-stacked tri- and tetra-layer graphene are studied using the density functional theory. It is found that they exhibit very different characteristic peaks in their IR spectra and G-band resonant Raman spectra, compared with those of AB-stacked ones, caused by the different stacking sequence and interlayer coupling. The anisotropy of the IR spectra with respect to the direction of the light electric field is significant. The IR spectra are more sensitive to the stacking number when the electric field is perpendicular to the graphene plane due to the interlayer polarization. On the other hand, the calculated first-order G-band resonant Raman spectra are also found to be sensitive to the different stacking sequence and stacking number, though the sensitivity will decay as the stacking number increases. The high sensitivities make both IR and Raman spectra possible to identify the stacking sequence and number of few-layer graphene by comparing theory and experiment.

关键词： RAMAN effect ABSORPTION spectra INFRARED spectra GRAPHENE DENSITY functionals

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Electrostress diffusion coupling model for polyelectrolyte gels (vol 38, pg 1349, 2005)

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MACROMOLECULES 2005年第17期38卷 7528-7528页

作者： Yamaue, T Mukai, H Asaka, K Doi, M []Department of Applied Physics and CREST-JST The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan Department of Computational Science and Engineering Nagoya University Chikusa-ku Nagoya Japan and Research Institute for Cell Engineering National Institute of Advanced Industrial Science and Technology (AIST) 1-8-31 Ikeda Osaka 563-8577 Japan

To describe the deformation dynamics of polyelectrolyte gel, we formulate the electrostress diffusion coupling model. The model describes the interplay of the deformation of gel, permeation of water, and the transport of ions. The model gives a microscopic expression for the Onsager coefficient and allows us to discuss the effect of ionic radius. The model is then applied to the bending dynamics of a thin strip of ionic gels under stepwise application of electric field. The model qualitatively explains the relaxation behavior of an ionic gel (Nafion 117) for various kinds of ions including large counterions such as TEA⁺ (tetraethylammonium).

关键词： Counterions Ions Electrodes Solvents Polymers

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