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A class of high-mobility layered nanomaterials by design

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Journal of Materials Science & Technology 2023年第33期164卷 179-187页

作者： Dmitry V.Averyanov Ivan S.Sokolov oleg E.parfenov Alexander N.Taldenkov oleg A.Kondratev Andrey M.Tokmachev Vyacheslav g.Storchak National Research Center “Kurchatov Institute” Kurchatov Sq.1Moscow 123182Russia

Design of materials with particular functional properties is indispensable albeit very *** and structural analogies can be helpful in this endeavor,especially when a particular combination of properties is sought *** aim is to bundle together 3 characteristics:high carrier mobility,magnetism,and scalability to nanomaterials in the form of a film–such a combination is particularly advantageous for ***,inspired by recent studies of MAl_(2)Si_(2)and related compounds,we develop magnetic EuAl_(2)ge_(2)and non-magnetic SrAl_(2)ge_(2)nanomaterials with high carrier *** syntheses employing sacrificial 2D templates result in epitaxial films of MAl_(2)ge_(2)seamlessly integrated with *** syntheses are followed by a study of the atomic structure,magnetic and electron transport *** particular,the films demonstrate high carrier mobility,exceeding 10,000 cm^(2)V^(-1)s^(-1)in the case of EuAl_(2)ge_(2),making the materials appealing for *** together,MAl_(2)ge_(2)and MAl_(2)Si_(2)form a class of high-mobility layered nanomaterials.

关键词： High carrier mobility Magnetism SrAl_(2)ge_(2) EuAl_(2)ge_(2) germanium

Submonolayer Eu superstructures—A class of 2D magnets

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Nano Research 2023年第1期16卷 1500-1506页

作者： Dmitry V.Averyanov Ivan S.Sokolov Alexander N.Taldenkov oleg E.parfenov Andrey M.Tokmachev Vyacheslav g.Storchak National Research Center“Kurchatov Institute” Kurchatov Sq.1Moscow 123182Russia

Two-dimensional(2D)magnetic materials promise unconventional properties and quantum phases as well as advances in ultracompact *** of 2D magnets often reaches a single monolayer but in general can go beyond this limit,as demonstrated by 2D magnetism of submonolayer Eu superstructures coupled with *** question is whether the submonolayer magnetism constitutes a general ***,we demonstrate that regular Eu lattices form a class of 2D magnets displaying various structures,stoichiometries,and chemical *** synthesized and studied a set of Eu superstructures on ge(001).Their magnetic properties are consistent with the emergence of a magnetic order such as ferro-or *** particular,control over the magnetic transition temperature by weak magnetic fields indicates the 2D nature of the *** together,Eu/ge and Eu/Si superstructures seed a nucleus of the research area addressing the emergence of magnetism in submonolayer chemical species.

关键词： two-dimensional(2D)magnetism submonolayer superstructure surface reconstruction germanium

Competing magnetic states in silicene and germanene 2D ferromagnets

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Nano Research 2020年第12期13卷 3396-3402页

作者： Dmitry V.Averyanov Ivan S.Sokolov Mikhail S.Platunov Fabrice Wilhelm Andrei Rogalev Pierluigi gargiani Manuel Valvidares Nicolas Jaouen oleg E.parfenov Alexander N.Taldenkov Igor A.Karateev Andrey M.Tokmachev Vyacheslav g.Storchak National Research Center“Kurchatov Institute” Kurchatov Sq.1Moscow123182Russia ESRF-The European Synchrotron CS 4022038043Grenoble Cedex 9France ALBA Synchrotron Light Source Cerdanyola del Vallès08290BarcelonaSpain L’Orme des Merisiers Synchrotron SOLEILGyf-sur-Yvette91192France

Two-dimension(2D)magnets have recently developed into a class of stoichiometric materials with prospective applications in ultra-compact spintronics and quantum *** functionality is particularly rich when different magnetic orders are competing in the same *** REX2(RE=Eu,gd;X=Si,ge),silicene or germanene—heavy counterparts of graphene—coupled with a layer of rare-earth metals,evolve from three-dimension(3D)antiferromagnets in multilayer structures to 2D ferromagnets in a few *** evolution,however,does not lead to fully saturated 2D ferromagnetism,pointing at a possibility of coexisting/competing magnetic ***,REX2 magnetism is explored with element-selective X-ray magnetic circular dichroism(XMCD).The measurements are carried out for gdSi2,EuSi2,gdge2,and Euge2 of different thicknesses down to 1 monolayer employing K absorption edges of Si and ge as well as M and L edges of the *** access the magnetic state in REX2 and determine the seat of magnetism,orbital,and spin contributions to the magnetic ***-field measurements probe remnants of the bulk antiferromagnetism in 2D *** results provide a new platform for studies of complex magnetic structures in 2D materials.

关键词： silicene germanene 2D ferromagnetism X-ray magnetic circular dichroism(XMCD) monolayer

Methods and Results of Assessment of the Pulse Electrical Disturbances Influence on. Digital Devices Functioning

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Journal of Physical Science and Application 2013年第6期3卷 392-399页

作者： Yury parfenov Boris Titov Leonid Zdoukhov Joint Institute for High Temperatures of Russian Academy of Sciences Moscow 125412 Russia

Two methods of calculating the parameters and characterizing the degree of pulse electrical disturbances influence on digital devices functioning, both analytical and numerical, are considered here. The analytical method permits one to assess the error occurrence probability in transmitting the data packets considering the dependence on the signal pulses energies-to-pulse disturbances energies ratio and the disturbances repetition frequency-to-data transmission rate ratio and also the dependence on the bits quantity in the packet. The numerical method allows one to assess the specific effect of the repetitive pulse disturbance influence on the digital devices functioning （the number of errors in transmitted data packets, transmission rate, etc.） depending on such factors as the repetition frequency, the disturbance waveform and duration, the mode of data coding, etc..

关键词： Pulse electrical disturbance digital device assessment of influence.

Patients with functional bowel disorder have disaccharidase deficiency:A single-center study from Russia

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World Journal of Clinical Cases 2021年第17期9卷 4178-4187页

作者： Saria Dbar Olga Akhmadullina Elena Sabelnikova Nikolai Belostotskiy Asfold parfenov Svetlana Bykova Sergey Bakharev Elena Baulo Alexandra Babanova Lilia Indeykina Tatyana Kuzmina Tatiana Kosacheva Aleksey Spasenov Alina Makarova Non-inflammatory Bowel Diseases Moscow Health DepartmentMoscow Clinical Scientific Center n.a.A.S.LoginovMoscow 111123Russia Moscow Health Department Moscow Clinical Scientific Center n.a.A.S.LoginovMoscow 111123Russia Pre-Clinical Research Laboratory Moscow Clinical Scientific Center Named after A.S.Loginov MHDMoscow 111123Russia Department of Bowel Pathology Moscow Health DepartmentMoscow Clinical Scientific Center n.a.A.S.LoginovMoscow 111123Russia Laboratory of Functional Diagnostics of Intestinal Diseases Moscow Health DepartmentMoscow Clinical Scientific Center n.a.A.S.LoginovMoscow 111123Russia Nutraceuticals Laboratory Moscow Health DepartmentMoscow Clinical Scientific Center n.a.A.S.LoginovMoscow 111123Russia Department of Medical Statistics Moscow Health DepartmentMoscow Clinical Scientific Center n.a.A.S.LoginovMoscow 111123Russia

BACKgROUND Functional bowel disorder(FBD)may be caused by a decrease in disaccharidase ***,the timely diagnosis of disaccharidase deficiency could lead to a better prognosis in patients with this *** To determine the potential value of intestinal disaccharidases glucoamylase,maltase,sucrase,and lactase in understanding the etiology and pathogenesis of *** A total of 82 FBD patients were *** to the Rome IV criteria(2016),23 patients had diarrhea-predominant irritable bowel syndrome(IBS),33 had functional diarrhea,10 had constipation-predominant IBS,4 had functional constipation,and 12 had mixed *** Dahlqvist method was used to measure disaccharidase activity in the brush-border membrane of mature enterocytes of the small intestine,in duodenal biopsies obtained during *** Lactase deficiency was detected in 86.5%of patients,maltase deficiency in 48.7%,sucrase deficiency in 50%,and glucoamylase deficiency in 84.1%.The activities of all enzymes were reduced in 31.7%of patients,and carbohydrase deficiency was detected in 63.5%of *** low activity of enzymes involved in membrane digestion in the small intestine was found in 95.2%of *** In 78 of the 82 patients with FBD,gastrointestinal symptoms were associated with disaccharidase deficiency.

关键词： Functional bowel disorder Irritable bowel syndrome Disaccharidase deficiency Maltase deficiency Sucrase deficiency Lactase deficiency

电力系统运行状态下抗高压脉冲干扰评估（英文）

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强激光与粒子束 2019年第7期31卷 40-44页

作者： Kozlov A parfenov Yu Chepelev V Shurupov A Shurupov M 陈宇浩谢彦召俄罗斯科学院联合高温研究所莫斯科125412 西安交通大学电力设备电气绝缘国家重点实验室西安710049

在系统运行与不运行状态下,线路绝缘子因高压脉冲而产生闪络和损伤现象的研究结果显示,脉冲干扰和系统工作电压的共同作用将对电力系统带来灾难性的威胁。而在电力系统中,高压变压器是非常重要并且昂贵的设备。本文给出了一些针对变压... 详细信息

在系统运行与不运行状态下,线路绝缘子因高压脉冲而产生闪络和损伤现象的研究结果显示,脉冲干扰和系统工作电压的共同作用将对电力系统带来灾难性的威胁。而在电力系统中,高压变压器是非常重要并且昂贵的设备。本文给出了一些针对变压器在脉冲干扰和系统工作电压共同作用时的试验方法。

关键词：脉冲干扰工作电压联合作用高压变压器

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Emerging 2D magnetic states in a graphene-based monolayer of EuC_(6)

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Nano Research 2022年第1期15卷 408-413页

作者： Ivan S.Sokolov Dmitry V.Averyanov Fabrice Wilhelm Andrei Rogalev oleg E.parfenov Alexander N.Taldenkov Igor A.Karateev Andrey M.Tokmachev Vyacheslav g.Storchak National Research Center“Kurchatov Institute” Kurchatov Sq.1Moscow 123182Russia ESRF-The European Synchrotron CS 4022038043 Grenoble Cedex 9France

Recent discoveries of intrinsic two-dimensional(2D)magnets open up vast opportunities to address fundamental problems in condensed matter physics,giving rise to applications from ultra-compact spintronics to quantum *** ever-growing material landscape of 2D magnets lacks,however,carbon-based systems,prominent in other areas of 2D *** measurements of the Eu/graphene compound-a monolayer of the EuC_(6) stoichiometry-reveal the emergence of 2D ferromagnetism but detailed studies of competing magnetic states are still ***,we employ element-selective X-ray absorption spectroscopy(XAS)and magnetic circular dichroism(XMCD)to establish the magnetic structure of monolayer *** system exhibits the anomalous Hall effect,negative magnetoresistance,and magnetization consistent with a ferromagnetic state but the saturation magnetic moment(about 2.5/%/Eu)is way too low for the half-filled f-shells of Eu^(2+)*** XAS/XMCD studies at the Eu L3 absorption edge probe the EuC6 magnetism in high fields and reveal the nature of the missing magnetic *** results are set against XMCD studies in Eu/silicene and Eu/germanene to establish monolayer EuC6 as a prominent member of the family of Eu-based 2D magnets combining the celebrated graphene properties with a strong magnetism of europium.

关键词： two-dimensional(2D)ferromagnetism graphene EuC_(6) X-ray magnetic circular dichroism(XMCD) monolayer

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切尔斯基地震带的地球动力学

地震地质译丛

地震地质译丛 1989年第3期 30-34页

作者： L.M.parfenov 雷姚錤

切尔斯基地震带是东北亚的宽400公里的北西向震中带(图1),东南伸向科尔多曼群岛,西北到达拉普捷夫海。我们不同意通常被认可的有关该地震带地球动力学的观点,许多工作者将gakkel山脉至日本岛弧北

关键词：断层控制裂谷带莫马新生代沉积山间盆地地球动力学地球物理学逆掩断层逆断层震源机制解震源机制走滑断层平移断层地质断层左行走滑非均质性右旋走滑余震地震地震带地震构造带

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东北亚的中生代构造演化

地球物理学进展 1987年第1期 87-87页

作者： L.M.parfenov 葛叶阳

东业亚构造演化的描述,来自于村本区层状构造地体的认识、以及对岛弧和大陆边绛(活动的和钝态的)横向带状排列的认识.以下的早中生代较大的大陆块已被确认:西伯利亚东部大陆(西伯矛,}亚台地)、Chukotsk和Bureinsk一Khankaisk微大陆地体... 详细信息

东业亚构造演化的描述,来自于村本区层状构造地体的认识、以及对岛弧和大陆边绛(活动的和钝态的)横向带状排列的认识.以下的早中生代较大的大陆块已被确认:西伯利亚东部大陆(西伯矛,}亚台地)、Chukotsk和Bureinsk一Khankaisk微大陆地体、以及推断的Okhotomorsk微大陆地体.上覆着古生代洋壳的Alazeya火山弧也被认为是一个微大陆.西伯利亚东部大陆边缘的东南,北边分别由Udsko一Murgal'sk岛弧、oloysk岛弧来匀划,而其南边是活动的大陆边缘.微大陆地体主要具有钝态的边缘.层状构造地体的横向带状排列和蛇绿岩的存在,表明这些微大陆地体被具有洋壳的盆地.与西伯利亚东部大陆分离出来.早中生代褶皱是由硅铝质地块的会聚和碰撞造成的.西伯利亚东部大陆与Bureillsk一Khankaisk微大陆地体的碰撞发生在晚休罗世的开始和中期末.南Anyui海盆地的封闭、以及Chukotsk微大陆地体连接到西伯利亚东部大陆上,发生在尼欧克姆期(早白奎世早期)的末期.到尼欧克姆期结束时,西伯利亚东部大陆的边球已变成类似现在的样子了.它和太平洋之间由安第斯类型的活动大陆边缘分隔开,而后者以(郑霍次克)Okhotsk一Chukotsk和(锡霍特)Sikhote一Alinsk的火山一深成带为标志.在白垄纪,当Bur。insk微大陆地体连接到西伯利亚东部大陆上之后,(锡霍特)Sikhote一Alin地区的、近似经度方向的一些走滑断层发育,这些断层与同okhotomorsk微大陆地体朝向(郑霍次克)Okhotsk一Chukotsk带一起运动的、Kula板块朝北的运动有关.

关键词：西伯利亚地体俄罗斯大陆边缘大洋边缘岛弧构造演化