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arXiv 2017年

作者： Céolin, D. Kryzhevoi, N.V. Nicolas, Ch Pokapanich, W. Choksakulporn, S. Songsiriritthigul, P. Saisopa, Th Rattanachai, Y. Utsumi, Y. Palaudoux, J. Öhrwall, G. Rueff, J.P. Synchrotron SOLEIL l’Orme des Merisiers Saint-Aubin Gif-sur-Yvette CedexF-91192 France Theoretical Chemistry Institute of Physical Chemistry Heidelberg University Im Neuenheimer Feld 229 Heidelberg69120 Germany Faculty of Science Nakhon Phanom University Nakhon Phanom48000 Thailand Synchrotron Light Research Institute Nakhon Ratchasima30000 Thailand NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials School of Physics Suranaree University of Technology Nakhon Ratchasima30000 Thailand Department of Applied Physics Faculty of Sciences and Liberal Arts Rajamangala University of Technology Isan Nakhon Ratchasima30000 Thailand CNRS UMR 7614 Laboratoire de Chimie Physique-Matière et Rayonnement ParisF-75005 France Sorbonne Universités UPMC Université Paris 06 UMR 7614 Laboratoire de Chimie Physique-Matière et Rayonnement ParisF-75005 France MAX IV Laboratory P.O. Box 118 LundSE-22100 Sweden

X-ray photoelectron spectroscopy (XPS) and KLL Auger spectra of aqueous KCl solution were measured for the K+ and Cledges. While the XPS spectra of potassium and chloride have similar structures, both exhibiting only weak satellite structures near the main line, the Auger spectra of these isoelectronic ions differ dramatically. A very strong satellite peak was found in the K+ KLL Auger spectrum at the low kinetic energy side of the 1D state. Using equivalent core models and ab initio calculations this spectral structure was assigned to electron transfer processes from solvent water molecules to the solvated K+ cation. Contrary to the potassium case, no extra peak was found in the KLL Auger spectrum of solvated Cl- indicating on a strong dependence of the underlying processes on ionic charge. The observed charge transfer processes are suggested to play an important role in charge redistribution following single and multiple core-hole creation in atomic and molecular systems placed into an environment. Copyright © 2017, The Authors. All rights reserved.

关键词： Charge transfer

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Ultralow-Frequency Collective Compression Mode and Strong Interlayer Coupling in Multilayer Black Phosphorus

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Physical Review Letters 2016年第8期116卷 087401-087401页

作者： Shan Dong Anmin Zhang Kai Liu Jianting Ji Y. G. Ye X. G. Luo X. H. Chen Xiaoli Ma Yinghao Jie Changfeng Chen Xiaoqun Wang Qingming Zhang Department of Physics Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices Renmin University of China Beijing 100872 People’s Republic of China Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics University of Science and Technology of China and Key Laboratory of Strongly-Coupled Quantum Matter Physics Chinese Academy of Sciences Hefei Anhui 230026 People’s Republic of China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 People’s Republic of China High Magnetic Field Laboratory Chinese Academy of Sciences Hefei Anhui 230031 People’s Republic of China Department of Physics and High Pressure Science and Engineering Center University of Nevada Las Vegas Nevada 89154 USA Department of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 People’s Republic of China

The recent renaissance of black phosphorus (BP) as a two-dimensional (2D) layered material has generated tremendous interest, but its unique structural characters underlying many of its outstanding properties still need elucidation. Here we report Raman measurements that reveal an ultralow-frequency collective compression mode (CCM) in BP, which is unprecedented among similar 2D layered materials. This novel CCM indicates an unusually strong interlayer coupling, and this result is quantitatively supported by a phonon frequency analysis and first-principles calculations. Moreover, the CCM and another branch of low-frequency Raman modes shift sensitively with changing number of layers, allowing an accurate determination of the thickness up to tens of atomic layers, which is considerably higher than previously achieved by using high-frequency Raman modes. These findings offer fundamental insights and practical tools for further exploration of BP as a highly promising new 2D semiconductor.

关键词： Heterostructures Multilayer thin films Photonic crystals Piezoelectrics Raman spectroscopy

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Interfacial Magnetization: Spatially Resolved Large Magnetization in Ultrathin BiFeO3(Adv. Mater. 32/2017)

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advanced Materials 2017年第32期29卷

作者： Er‐Jia Guo Jonathan R. Petrie Manuel A. Roldan Qian Li Ryan D. Desautels Timothy Charlton Andreas Herklotz John Nichols Johan van Lierop John W. Freeland Sergei V. Kalinin Ho Nyung Lee Michael R. Fitzsimmons Quantum Condensed Matter Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA Material Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA Imaging and Characterization Core Lab King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia Center for Nanophase Materials Sciences and Institute for Functional Imaging of Materials Oak Ridge National Laboratory Oak Ridge TN 37831 USA Department of Physics and Astronomy University of Manitoba Winnipeg Manitoba R3T 2N2 Canada Advanced Photon Source Argonne National Laboratory Argonne IL 60439 USA Department of Physics and Astronomy University of Tenessee Knoxville TN 37996 USA

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Fermiology and superconductivity of topological surface states in PdTe2

arXiv

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arXiv 2017年

作者： Clark, O.J. Neat, M.J. Okawa, K. Bawden, L. Marković, I. Mazzola, F. Feng, J. Sunko, V. Riley, J.M. Meevasana, W. Fujii, J. Vobornik, I. Kim, T.K. Hoesch, M. Sasagawa, T. Wahl, P. Bahramy, M.S. King, P.D.C. SUPA School of Physics and Astronomy University of St. Andrews St. AndrewsKY16 9SS United Kingdom Materials and Structures Laboratory Tokyo Institute of Technology Kanagawa226-8503 Japan Max Planck Institute for Chemical Physics of Solids Nöthnitzer Straße 40 Dresden01187 Germany CAS SEID SIP 398 Ruoshui Road Suzhou215123 China Diamond Light Source Harwell Campus DidcotOX11 0DE United Kingdom School of Physics Center of Excellence on Advanced Functional Materials Suranaree University of Technology Nakhon Ratchasima30000 Thailand ThEP Commission of Higher Education Bangkok10400 Thailand -CNR Laboratorio TASC in Area Science Park S.S.14 Km 163.5 TriesteI-34149 Italy Quantum-Phase Electronics Center Department of Applied Physics University of Tokyo Tokyo113-8656 Japan Wako351-0198 Japan

We study the low-energy surface electronic structure of the transition-metal dichalcogenide superconductor PdTe2 by spin- and angle-resolved photoemission, scanning tunneling microscopy, and density-functional theory-based supercell calculations. Comparing PdTe2 with its sister compound PtSe2, we demonstrate how enhanced inter-layer hopping in the Te-based material drives a band inversion within the anti-bonding p-orbital manifold well above the Fermi level. We show how this mediates spin-polarised topological surface states which form rich multi-valley Fermi surfaces with complex spin textures. Scanning tunneling spectroscopy reveals type-II superconductivity at the surface, and moreover shows no evidence for an unconventional component of its superconducting order parameter, despite the presence of topological surface states. Copyright © 2017, The Authors. All rights reserved.

关键词： Transition metals

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Cover Picture: Improving the Electrocatalytic Activity of Pt Monolayer Catalysts for Electrooxidation of Methanol, Ethanol and Ammonia by Tailoring the Surface Morphology of the Supporting Core (ChemElectroChem 4/2016)

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ChemElectroChem 2016年第4期3卷 504-504页

作者： Jie Liu Bin Chen Zhengyang Ni Yida Deng Xiaopeng Han Wenbin Hu Prof. Cheng Zhong Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) Tianjin 300072 China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University Shanghai 200240 China Tianjin Key Laboratory of Composite and Functional Materials Department of Materials Science and Engineering Tianjin 300072 China

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Inside Cover: Studies on the Electrochemical Stability of Preferentially (100)-Oriented Pt Prepared through Three Different Methods (ChemElectroChem 1/2017)

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ChemElectroChem 2016年第1期4卷 2-2页

作者： Zhi Liu Chao Ma Dr. Jie Liu Xu Chen Zhishuang Song Prof. Wenbin Hu Prof. Cheng Zhong State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University Shanghai 200240 China Tianjin Key Laboratory of Composite and Functional Material School of Materials Science and Engineering Tianjin University Tianjin 300072 China Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) School of Materials Science and Engineering Tianjin University Tianjin 300072 China

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Measurements of the center-of-mass energies at BESⅢ via the di-muon process

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Chinese Physics C 2016年第6期40卷 1-8页

作者：麦迪娜 M.N.Achasov 艾小聪 O.Albayrak M.Albrecht D.J.Ambrose A.Amoroso 安芬芬安琪白景芝 R.Baldini Ferroli 班勇 D.W.Bennett J.V.Bennett M.Bertani D.Bettoni 边渐鸣 F.Bianchi E.Boger I.Boyko R.A.Briere 蔡浩蔡啸 O.Cakir A.Calcaterra 曹国富 S.A.Cetin 常劲帆 G.Chelkov 陈刚陈和生陈海云陈江川陈玛丽陈申见谌炫陈旭荣陈元柏程和平褚新坤 G.Cibinetto 代洪亮代建平 A.Dbeyssi D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.De Mori 丁勇董超董静董燎原董明义杜书先段鹏飞范荆州方建房双世方馨方易 L.Fava F.Feldbauer G.Felici 封常青 E.Fioravanti M.Fritsch 傅成栋高清高鑫磊高旭阳高原宁高榛 I.Garzia K.Goetzen 龚文煊 W.Gradl M.Greco 顾旻皓顾运厅管颖慧郭爱强郭立波郭玥郭玉萍 Z.Haddadi A.Hafner 韩爽郝喜庆 F.A.Harris 何康林 T.Held 衡月昆侯治龙胡琛胡海明胡继峰胡涛胡誉黄光明黄光顺黄金书黄性涛黄勇 T.Hussain 纪全姬清平季晓斌季筱璐姜鲁文江晓山蒋兴雨焦健斌焦铮金大鹏金山 T.Johansson A.Julin N.Kalantar-Nayestanaki 康晓琳康晓珅 M.Kavatsyuk B.C.Ke P.Kiese R.Kliemt B.Kloss O.B.Kolcu B.Kopf M.Kornicer W.Kühn A.Kupsc J.S.Lange M.Lara P.Larin C.Leng 李翠李澄李德民李飞李峰云李刚李海波李家才李瑾李康李科李蕾李培荣李腾李卫东李卫国李晓玲李小梅李小男李学潜李志兵梁昊梁勇飞梁羽铁廖广睿 D.X.Lin(lin) 刘北江刘春秀刘栋刘福虎刘芳刘峰刘宏邦刘欢欢刘汇慧刘怀民刘杰刘建北刘觉平刘晶译刘凯刘魁勇刘兰雕刘佩莲刘倩刘树彬刘翔刘玉斌刘振安刘智清 H.Loehner 娄辛丑吕海江吕军光卢宇卢云鹏罗成林罗民兴 T.Luo 罗小兰吕晓睿马凤才马海龙马连良马秋梅马天马旭宁马骁妍 F.E.Maas M.Maggiora 冒亚军毛泽普 S.Marcello J.G.Messchendorp 闵建 R.E.Mitchell 莫晓虎莫玉俊 C.Morales Morales K.Moriya N.Yu.Muchnoi H.Muramatsu Y.Nefedov F.Nerling I.B.Nikolaev 宁哲 S.Nisar 牛顺利牛讯伊馬鵬欧阳群 S.Pacetti 潘越 P.Patteri M.Pelizaeus 彭海平 K.Peters J.Pettersson 平加伦平荣刚 R.Poling V.Prasad 祁鸣钱森乔从丰秦丽清覃拈秦小帅秦中华邱进发 K.H.Rashid C.F.Redmer M.Ripka 荣刚 Ch.Rosner 阮向东 V.Santoro A.Sarantsev M.Savrie K.Schoenning S.Schumann 单葳邵明沈成平沈培迅沈肖雁盛华义宋维民宋欣颖 S.Sosio S.Spataro 孙功星孙俊峰孙胜森孙勇杰孙永昭孙志嘉孙振田唐昌建唐晓 I.Tapan E.H.Thorndike M.Tiemens M.Ullrich I.Uman G.S.Varner 王斌王东王大勇王科王亮亮王灵淑王萌王平王佩良王思广王炜王维平王雄飞王雅迪王贻芳王亚乾王铮王志刚王志宏王至勇 T.Weber 魏代会韦江波 P.Weidenkaff 文硕频 U.Wiedner M.Wolke 伍灵慧吴智夏磊夏力钢夏宇肖栋肖浩肖振军谢宇广修青磊许国发徐雷徐庆君徐新平严亮鄢文标闫文成颜永红杨海军杨洪勋杨柳杨迎杨永栩叶梅叶铭汉殷俊昊俞伯祥喻纯旭俞洁晟苑长征袁文龙袁野 A.Yuncu A.A.Zafar A.Zallo 曾云曾哲张丙新张炳云张弛张长春张达华张宏浩章红宇张佳佳张杰磊张敬庆张家文张建勇张景芝张坤张磊张学尧张瑶张宇宁张银鸿张亚腾张宇张正好张子平张振 Institute of High Energy Physics G.I.Budker Institute of Nuclear Physics SB RAS(BINP) the Novosibirsk State University Carnegie Mellon University Bochum Ruhr-University University of Rochester University of Turin INFN University of Science and Technology of China State Key Laboratory of Particle Detection and Electronics INFN Laboratori Nazionali di Frascati Peking University Indiana University INFN Sezione di Ferrara University of Minnesota Joint Institute for Nuclear Research the Moscow Institute of Physics and Technology Wuhan University Istanbul Aydin University Ankara University University of Eastern Piedmont the Functional Electronics Laboratory Tomsk State University Beihang University Nanjing University Lanzhou University Huangshan College Shanghai Jiao Tong University Helmholtz Institute Mainz Johannes Gutenberg University of Mainz Liaoning University Nankai University Zhengzhou University Tsinghua University GSI Helmholtzcentre for Heavy Ion Research GmbH GuangXi University Nanjing Normal University KVI-CART University of Groningen Henan Normal University University of Hawaii Central China Normal University Shandong University University of the Punjab Uppsala University Dogus University Istanbul Arel University Justus Liebig University Giessen Ⅱ.Physikalisches Institut Seoul National University Hangzhou Normal University Beijing Institute of Petrochemical Technology University of Chinese Academy of Sciences Sun Yat-Sen University Sichuan University Guangxi Normal University Shanxi University Henan University of Science and Technology University of Texas at Dallas Zhejiang University COMSATS Institute of Information Technology INFN and University of Perugia the NRC "Kurchatov Institute" PNPI University of Ferrara Uludag University Hunan University University of South China Soochow University China Center of Advanced Science and Technology Turkey Bogazici University University of Science and Technology Liaoning

From 2011 to 2014, the BESIII experiment collected about 5 fb^-1 data at center-of-mass energies around 4 GeV for the studies of the charmonium-like and higher excited charmonium states. By analyzing the di-muon process e＋e- →yma/Fsμ^＋μ^-, the center-of-mass energies of the data samples are measured with a precision of 0.8 MeV. The center-of-mass energy is found to be stable for most of the time during data taking.

关键词： center-of-mass energy di-muon process charmoniumlike states

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[Cd（H2O）6]@[Cd6Cl4（nico）12(Hg（Tab）2（μ-Cl）)2]:a novel heterobimetallic thiolate complex with chlorine-capped,nicotinate-bridged cage structure

[Cd（H2O）6]@[Cd6Cl4（nico）12(Hg（Tab）2（μ-Cl）)2]:a nove...

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中国化学会第九届全国无机化学学术会议

作者： Xiao-Yan Tang Hong Yu College of Chemistry Chemical Engineering and Materials ScienceSoochow University Jiangsu Laboratory of Advanced Functional Materials Changshu Institute of Technology

The design and preparation of heterobimetallic complexes has attracted considerable attention due to their structures and their potential applications in catalytic,photoluminescent and other photophysical *** to the homometallic thiolate clusters,the heterobimetallic ones have been less studied because of their instability,the difficulty in isolating and crystallizing them and the risk of the occurrence of transimetallic ***,we have been interested in the preparation and physicochemiscal properties of metal complexes of a zwitterionic thiolate(Tab=4-(trimethylammonio)benzenethiolate).In this paper,we carefully investigated the reactions of a preformed complex[Hg(Tab)2](PF6)2(1)with nicotinic acid in the existence of Et3N,which gave a mononuclear adduct complex[Hg(Tab)2(nico)](PF6)(2).Treatment of 2 with Cd Cl2·2.5H2O(molar ratio=1:1 or1:3)afforded two cationic heterobinuclear complexes[Cd(H2O)6]@[Cd6Cl4(nico)12(Hg(Tab)2(μ-Cl))2](3)and[Hg(Tab)2][Cd Cl4](4),*** Hg atom of[Hg(Tab)2(nico)]+cation in 2 adopts a T-shaped coordination *** the structure of 3,six Cd ions make up a regular octahedron with each edge consisted of a *** the bottom and/or top of the octahedron,a[Hg(Tab)2]2+unit is bridged by a Cl atom and O atom of nicotinate,and a[Cd(H2O)6]2+group is enclosed into the center of the ***[Hg(Tab)2]2+dication of 4 is weakly linked with a[Cd Cl4]2-dianion via somewhat long Hg–Cl bond.

关键词： Heterobimetallic complexes,Zwitterionic thiolate,Crystal structure,Cadmium(Ⅱ),Mercury(Ⅱ)

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Ubiquitous formation of bulk Dirac cones and topological surface states from a single orbital manifold in transition-metal dichalcogenides

arXiv

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arXiv 2017年

作者： Bahramy, M.S. Clark, O.J. Yang, B.-J. Feng, J. Bawden, L. Riley, J.M. Marković, I. Mazzola, F. Sunko, V. Biswas, D. Cooil, S.P. Jorge, M. Wells, J.W. Leandersson, M. Balasubramanian, T. Fujii, J. Vobornik, I. Rault, J.E. Kim, T.K. Hoesch, M. Okawa, K. Asakawa, M. Sasagawa, T. Eknapakul, T. Meevasana, W. King, P.D.C. Quantum-Phase Electronics Center Department of Applied Physics University of Tokyo Tokyo113-8656 Japan Wako351-0198 Japan SUPA School of Physics and Astronomy University of St. Andrews St. Andrews FifeKY16 9SS United Kingdom Department of Physics and Astronomy Seoul National University Seoul08826 Korea Republic of Seoul08826 Korea Republic of Seoul National University Seoul08826 Korea Republic of CAS SEID SIP 398 Ruoshui Road Suzhou215123 China Diamond Light Source Harwell Campus DidcotOX11 0DE United Kingdom Max Planck Institute for Chemical Physics of Solids Nöthnitzer Straße 40 Dresden01187 Germany Center for Quantum Spintronics Department of Physics Norwegian University of Science and Technology TrondheimNO-7491 Norway MAX IV Laboratory Lund University P. O. Box 118 Lund221 00 Sweden -CNR Laboratorio TASC in Area Science Park S.S.14 Km 163.5 TriesteI-34149 Italy Synchrotron SOLEIL CNRS-CEA L’Orme des Merisiers Saint-Aubin-BP48 Gif-sur-Yvette91192 France Laboratory for Materials and Structures Tokyo Institute of Technology Kanagawa226-8503 Japan School of Physics Center of Excellence on Advanced Functional Materials Suranaree University of Technology Nakhon Ratchasima30000 Thailand ThEP Commission of Higher Education Bangkok10400 Thailand

Transition-metal dichalcogenides (TMDs) are renowned for their rich and varied bulk properties, while their single-layer variants have become one of the most prominent examples of two-dimensional materials beyond graphene. Their disparate ground states largely depend on transition metal d-electron-derived electronic states, on which the vast majority of attention has been concentrated to date. Here, we focus on the chalcogen-derived states. From density-functional theory calculations together with spin- and angle-resolved photoemission, we find that these generically host a coexistence of type-I and type-II three-dimensional bulk Dirac fermions as well as ladders of topological surface states and surface resonances. We demonstrate how these naturally arise within a single p-orbital manifold as a general consequence of a trigonal crystal field, and as such can be expected across a large number of compounds. Already, we demonstrate their existence in six separate TMDs, opening routes to tune, and ultimately exploit, their topological physics. Copyright © 2017, The Authors. All rights reserved.

关键词： Transition metals

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Effects of ultrahigh pressure extraction on yield and antioxidant activity of chlorogenic acid and cynaroside extracted from flower buds of Lonicera japonica

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Chinese Journal of Natural Medicines 2015年第6期13卷 445-453页

作者： HU Wen GUO Ting JIANG Wen-Jun DONG Guang-Li CHEN Da-Wei YANG Shi-Lin LI He-Ran College of Pharmacy Soochow University Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application Department of Polymer Science and Engineering College of Chemistry Chemical Engineering and Materials Science Soochow University Guiding Long Da Honeysuckle Technology Co. Ltd.

The present study was designed to establish and optimize a new method for extracting chlorogenic acid and cynaroside from Lonicera japonica Thunb. through orthogonal experimental designl. A new ultrahigh pressure extraction （UPE） technology was applied to extract chlorogenic acid and cynaroside from L. japonica. The influential factors, including solvent type, ethanol concentration, extraction pressure, time, and temperature, and the solid/liquid ratio, have been studied to optimize the extraction process, The optimal conditions for the UPE were developed by quantitative analysis of the extraction products by HPLC-DAD in comparison with standard samples. In addition, the microstructures of the medicinal materials before and after extraction were studied by scanning electron microscopy （SEM）. Furthermore, the extraction efficiency of different extraction methods and the 2, 2-diphenyl-1-picrylhydrazyl （DPPH） radical scavenging activities of the extracts were investigated. The optimal conditions for extracting chlorogenic acid and cynaroside were as follows： ethanol concentration, 60%; extraction pressure, 400 MPa; extraction time, 2 rain; extraction temperature, 30 ℃; and the solid/liquid ratio, 1 ： 50. Under these conditions, the yields of chlorogenic acid and cynaroside were raised to 4.863% and 0.080%, respectively. Compared with other extraction methods, such as heat reflux extraction （HRE）, ultrasonic extraction （UE）, and Sohxlet extraction （SE）, the UPE method showed several advantages, including higher extraction yield, shorter extraction time, lower energy consumption, and higher purity of the extracts. This study could help better utilize L. japonica flower buds as a readily accessible source of natural antioxidants in food and pharmaceutical industries.

关键词： Lonicerajaponica Thunb. Ultrahigh pressure extraction Chlorogenic acid Cynaroside Antioxidant activity

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