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arXiv 2018年

作者： Li, Yingcheng Wang, Hongyu Hu, Yuting Wan, Yidun State Key Laboratory of Surface Physics Fudan University Shanghai200433 China Department of Physics Center for Field Theory and Particle Physics Fudan University Shanghai200433 China Institute for Nanoelectronic devices and Quantum computing Fudan University Shanghai200433 China Department of Physics Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen518055 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China

An anyonic exclusion statistics, which generalizes the Bose-Einstein and Fermi-Dirac statistics of bosons and fermions, was proposed by Haldane[1]. When fusion of anyons is involved, certain 'pseudo-species' anyons appear in the exotic statistical weights of non-Abelian anyon systems;however, the meaning and significance of pseudospecies remains an open problem. The relevant past studies had considered only anyon systems without any physical boundary but boundaries often appear in real-life materials. In this paper, we propose an extended anyonic exclusion statistics on surfaces with gapped boundaries, introducing mutual exclusion statistics between anyons as well as the boundary components. Motivated by Refs. [2, 3], we present a formula for the statistical weight of many-anyon states obeying the proposed statistics. Taking the (doubled) Fibonacci topological order as an example, we develop a systematic basis construction for non-Abelian anyons on any Riemann surfaces with gapped boundaries. The basis construction offers a standard way to read off a canonical set of statistics parameters and hence write down the extended statistical weight of the anyon system being studied. The basis construction reveals the meaning of pseudo-species. A pseudo-species has different 'excitation' modes, each corresponding to an anyon species. The 'excitation' modes of pseudo-species corresponds to good quantum numbers of subsystems of a non-Abelian anyon system. This is important because often (e.g., in topological quantum computing) we may be concerned about only the entanglement between such subsystems. Copyright © 2018, The Authors. All rights reserved.

关键词： Statistics

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Rotation symmetry enforced coupling of spin and angular-momentum for p-orbital bosons

arXiv

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arXiv 2018年

作者： Li, Yongqiang Yuan, Jianmin Hemmerich, Andreas Li, Xiaopeng Department of Physics National University of Defense Technology Changsha410073 China Department of Physics Graduate School of China Academy of Engineering Physics Beijing100193 China Institut für Laser-Physik Universität Hamburg Luruper Chaussee 149 Hamburg22761 Germany State Key Laboratory of Surface Physics Institute of Nanoelectronics and Quantum Computing Department of Physics Fudan University Shanghai200433 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China

Intrinsic spin angular-momentum coupling of an electron has a relativistic quantum origin with the coupling arising from charged-orbits, which does not carry over to charge-neutral atoms. Here we propose a mechanism of spontaneous generation of spin angular-momentum coupling with spinor atomic bosons loaded into p-orbital bands of a two-dimensional optical-lattice. This spin angular-momentum coupling originates from many-body correlations and spontaneous symmetry breaking in a superfluid, with the key ingredients attributed to spin-channel quantum fluctuations and an approximate rotation symmetry. The resultant spin angular-momentum intertwined superfluid has Dirac excitations. In presence of a chemical potential difference for adjacent sites, it provides a bosonic analogue of a symmetry-protected-topological insulator. Through a dynamical mean-field calculation, this novel superfluid is found to be a generic low-temperature phase, and it gives way to Mott localization only at strong interactions and even-integer fillings. We show the temperature to reach this order is accessible with present experiments. Copyright © 2018, The Authors. All rights reserved.

关键词： Angular momentum

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Population of Merging Compact Binaries Inferred Using Gravitational Waves through GWTC-3

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Physical Review X 2023年第1期13卷 011048-011048页

作者： R. Abbott T. D. Abbott F. Acernese K. Ackley C. Adams N. Adhikari R. X. Adhikari V. B. Adya C. Affeldt D. Agarwal M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain P. Ajith T. Akutsu P. F. de Alarcón S. Akcay S. Albanesi A. Allocca P. A. Altin A. Amato C. Anand S. Anand A. Ananyeva S. B. Anderson W. G. Anderson M. Ando T. Andrade N. Andres T. Andrić S. V. Angelova S. Ansoldi J. M. Antelis S. Antier F. Antonini S. Appert Koji Arai Koya Arai Y. Arai S. Araki A. Araya M. C. Araya J. S. Areeda M. Arène N. Aritomi N. Arnaud M. Arogeti S. M. Aronson K. G. Arun H. Asada Y. Asali G. Ashton Y. Aso M. Assiduo S. M. Aston P. Astone F. Aubin C. Austin S. Babak F. Badaracco M. K. M. Bader C. Badger S. Bae Y. Bae A. M. Baer S. Bagnasco Y. Bai L. Baiotti J. Baird R. Bajpai M. Ball G. Ballardin S. W. Ballmer A. Balsamo G. Baltus S. Banagiri D. Bankar J. C. Barayoga C. Barbieri B. C. Barish D. Barker P. Barneo F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett M. A. Barton I. Bartos R. Bassiri A. Basti M. Bawaj J. C. Bayley A. C. Baylor M. Bazzan B. Bécsy V. M. Bedakihale M. Bejger I. Belahcene V. Benedetto D. Beniwal T. F. Bennett J. D. Bentley M. BenYaala F. Bergamin B. K. Berger S. Bernuzzi C. P. L. Berry D. Bersanetti A. Bertolini J. Betzwieser D. Beveridge R. Bhandare U. Bhardwaj D. Bhattacharjee S. Bhaumik I. A. Bilenko G. Billingsley S. Bini R. Birney O. Birnholtz S. Biscans M. Bischi S. Biscoveanu A. Bisht B. Biswas M. Bitossi M.-A. Bizouard J. K. Blackburn C. D. Blair D. G. Blair R. M. Blair F. Bobba N. Bode M. Boer G. Bogaert M. Boldrini L. D. Bonavena F. Bondu E. Bonilla R. Bonnand P. Booker B. A. Boom R. Bork V. Boschi N. Bose S. Bose V. Bossilkov V. Boudart Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady A. Bramley A. Branch M. Branchesi J. Brandt J. E. Brau M. Breschi T. Briant J. H. Briggs A. Brillet M. Brinkmann P. Brockill A. F. Brooks J. Brooks D. D. Brown S. Brunett G. Bruno R. Bruntz J. Bryant T. Bulik H. J. Bulten A. Buonanno R. Buscicchio D. Buskulic C. Buy R. L. Byer L. Cadonati LIGO Laboratory California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA Dipartimento di Farmacia Università di Salerno I-84084 Fisciano Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy OzGrav School of Physics & Astronomy Monash University Clayton 3800 Victoria Australia LIGO Livingston Observatory Livingston Louisiana 70754 USA University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) D-30167 Hannover Germany Leibniz Universität Hannover D-30167 Hannover Germany Inter-University Centre for Astronomy and Astrophysics Pune 411007 India University of Cambridge Cambridge CB2 1TN United Kingdom Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena D-07743 Jena Germany University of Birmingham Birmingham B15 2TT United Kingdom Center for Interdisciplinary Exploration & Research in Astrophysics (CIERA) Northwestern University Evanston Illinois 60208 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil Gravity Exploration Institute Cardiff University Cardiff CF24 3AA United Kingdom INFN Sezione di Pisa I-56127 Pisa Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India Gravitational Wave Science Project National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Universitat de les Illes Balears IAC3–IEEC E-07122 Palma de Mallorca Spain University College Dublin Dublin 4 Ireland INFN Sezione di Torino I-10125 Torino Italy Università di Napoli “Federico II” Complesso Universitario di Monte S. Angelo I-80126 Napoli

We report on the population properties of compact binary mergers inferred from gravitational-wave observations of these systems during the first three LIGO-Virgo observing runs. The Gravitational-Wave Transient Catalog 3 (GWTC-3) contains signals consistent with three classes of binary mergers: binary black hole, binary neutron star, and neutron star–black hole mergers. We infer the binary neutron star merger rate to be between 10 and 1700 Gpc−3 yr−1 and the neutron star–black hole merger rate to be between 7.8 and 140 Gpc−3 yr−1, assuming a constant rate density in the comoving frame and taking the union of 90% credible intervals for methods used in this work. We infer the binary black hole merger rate, allowing for evolution with redshift, to be between 17.9 and 44 Gpc−3 yr−1 at a fiducial redshift (z=0.2). The rate of binary black hole mergers is observed to increase with redshift at a rate proportional to (1+z)κ with κ=2.9−1.8+1.7 for z≲1. Using both binary neutron star and neutron star–black hole binaries, we obtain a broad, relatively flat neutron star mass distribution extending from 1.2−0.2+0.1 to 2.0−0.3+0.3M⊙. We confidently determine that the merger rate as a function of mass sharply declines after the expected maximum neutron star mass, but cannot yet confirm or rule out the existence of a lower mass gap between neutron stars and black holes. We also find the binary black hole mass distribution has localized over- and underdensities relative to a power-law distribution, with peaks emerging at chirp masses of 8.3−0.5+0.3 and 27.9−1.8+1.9M⊙. While we continue to find that the mass distribution of a binary’s more massive component strongly decreases as a function of primary mass, we observe no evidence of a strongly suppressed merger rate above approximately 60M⊙, which would indicate the presence of a upper mass gap. Observed black hole spins are small, with half of spin magnitudes below χi≈0.25. While the majority of spins are preferentially aligned wi

关键词： Gravitational wave sources Gravitational waves Gravitational wave detection

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Publisher Correction: All-inorganic cesium lead iodide perovskite solar cells with stabilized efficiency beyond 15

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Nature communications 2018年第1期9卷 4935页

作者： Kang Wang Zhiwen Jin Lei Liang Hui Bian Dongliang Bai Haoran Wang Jingru Zhang Qian Wang Shengzhong Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science & Engineering Shaanxi Normal University 710119 Xi'an People's Republic of China. Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science & Engineering Shaanxi Normal University 710119 Xi'an People's Republic of China. jinzhiwen@***. School of Physical Science and Technology & Key Laboratory for Magnetism and Magnetic Materials of MoE Lanzhou University Lanzhou 730000 People's Republic of China. jinzhiwen@***. Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science & Engineering Shaanxi Normal University 710119 Xi'an People's Republic of China. wangqian16@***. School of Physical Science and Technology & Key Laboratory for Magnetism and Magnetic Materials of MoE Lanzhou University Lanzhou 730000 People's Republic of China. wangqian16@***. Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science & Engineering Shaanxi Normal University 710119 Xi'an People's Republic of China. szliu@***. Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences 116023 Dalian People's Republic of China. szliu@***.

In the original version of this Article, the author name 'Shengzhong Liu' was incorrectly given as 'Liu Shengzhong'. This has been corrected in both the PDF and HTML versions of the Article.

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Towards the manipulation of topological states of matter: A perspective from electron transport

arXiv

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arXiv 2018年

作者： Zhang, Cheng Lu, Hai-Zhou Shen, Shun-Qing Chen, Yong P. Xiu, Faxian State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai200433 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China Institute for Quantum Science and Engineering Department of Physics South University of Science and Technology of China Shenzhen518055 China Shenzhen Key Laboratory of Quantum Science and Engineering Shenzhen518055 China Department of Physics University of Hong Kong Pokfulam Road Hong Kong Department of Physics and Astronomy Purdue University West LafayetteIN47907 United States Birck Nanotechnology Center Purdue University West LafayetteIN47907 United States School of Electrical and Computer Engineering Purdue University West LafayetteIN47907 United States Institute for Nanoelectronic Devices and Quantum Computing Fudan University Shanghai200433 China

The introduction of topological invariants, ranging from insulators to metals, has provided new insights into the traditional classification of electronic states in condensed matter physics. A sudden change in the topological invariant at the boundary of a topological nontrivial system leads to the formation of exotic surface states that are dramatically different from its bulk. In recent years, significant advancements in the exploration of the physical properties of these topological systems and regarding device research related to spintronics and quantum computation have been made. Here, we review the progress of the characterization and manipulation of topological phases from the electron transport perspective and also the intriguing chiral/Majorana states that stem from them. We then discuss the future directions of research into these topological states and their potential applications. Copyright © 2018, The Authors. All rights reserved.

关键词： Electron transport properties

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Corrigendum to “the dual role of shot peening in hydrogen-assisted cracking of PSB1080 high strength steel” [Mater. Des. 110 (2016) 602–615]

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Materials & Design 2019年 166卷

作者： Xinfeng Li Jin Zhang Yanfei Wang Mingming Ma Sicong Shen Xiaolong Song State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University Xi'an 710049 China Department of Geosciences Center for Materials by Design Institute for Advanced Computational Science State University of New York Stony Brook NY 11794-2100 USA School of Chemical Engineering & Technology China University of Mining and Technology Xuzhou 221116 China School of Department of Heat Treatment and Surface Treatment Avic Aircraft. Co. Ltd. Xi'an Brake Branch Xingping 713106 China

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Mg3+dSbxBi2-xfamily: A promising substitute for the start-of-art n-type thermoelectric materials near room temperature

arXiv

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arXiv 2018年

作者： Shu, Rui Zhou, Yecheng Wang, Qi Han, Zhijia Zhu, Yongbin Liu, Yong Chen, Yuexing Gu, Meng Xu, Wei Wang, Yu Zhang, Wenqing Huang, Li Liu, Weishu Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 China Department of Physics Southern University of Science and Technology Shenzhen518055 China Beijing Institute of Aeronautical Materials AECC Beijing100095 China Beijing Synchrotron Radiation Facility Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai201204 China Shenzhen Key Laboratory of Advanced Thin Films and Applications College of Physics and Energy Shenzhen University Shenzhen518060 China

Bi2Te3-xSexfamily has been the n-type start-of-the-art thermoelectric materials near room temperatures (RT) for more than half-century, which dominates the active cooling and novel waves harvesting application near RT. However, the drawbacks of brittle nature and Te-containing restrict the further applications exploring. Here, we show that a Mg3+dSbxBi2-xfamily ((ZT)avg=1.05) could be a promising substitute for the Bi2Te3-xSexfamily ((ZT)avg=0.9-1.0) in the temperature range of 50-250 °C based on the comparable thermoelectric performance through a synergistic effect from the tunable band gap using the alloy effect and the suppressible Mg-vacancy formation using interstitial Mn dopant. The former is to shift the optimal thermoelectric performance to near RT, and latter is helpful to partially decouple the electrical transport and thermal transport in order to get an optimal RT power factor. A positive temperature-dependence of band gap suggested this family is also a superior medium-temperature thermoelectric material for the significantly suppressed bipolar effect. Furthermore, a two times higher mechanical toughness, compared with Bi2Te3-xSexfamily, consolidates the promising substitute for the start-of-art n-type thermoelectric materials near RT. Copyright © 2018, The Authors. All rights reserved.

关键词： Thermoelectric equipment

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Strain-induced ferroelectricity and spin-lattice coupling in SrMnO3 thin films

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Physical Review B 2018年第23期97卷 235135-235135页

作者： J. W. Guo P. S. Wang Y. Yuan Q. He J. L. Lu T. Z. Chen S. Z. Yang Y. J. Wang R. Erni M. D. Rossell V. Gopalan H. J. Xiang Y. Tokura P. Yu State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing 100084 China Key Laboratory of Computational Physical Sciences (Ministry of Education) State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China Department of Materials Science and Engineering and Materials Research Institute Pennsylvania State University University Park Pennsylvania 16802 USA Department of Physics Durham University Durham DH1 3LE United Kingdom Electron Microscopy Center Empa Swiss Federal Laboratories for Materials Science and Technology CH-8600 Dubendorf Switzerland Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 People's Republic of China RIKEN Center for Emergent Matter Science (CEMS) Saitama 351-0198 Japan Collaborative Innovation Center of Quantum Matter Beijing 100084 China

Designing novel multiferroic materials with simultaneous ferroelectric and magnetic orders has been one of the focal points over the last decade due to the promising applications and rich physics involved. In this study, using epitaxial strain (up to 3.8%) as tuning knob, we successfully introduce multiferroicity with prominent high-temperature ferroelectricity into the paraelectric SrMnO3. More interestingly, the experimental temperature-dependent ferroelectric and magnetic studies suggest that the emergent antiferromagnetic order below 100 K greatly enhances the ferroelectric polarization due to the spin-order-induced ionic displacements. We envision that the strain-mediated spin-phonon coupling can be utilized as a pathway to discover functionalities in a wide range of antiferromagnetic insulators with delicate epitaxial manipulations.

关键词： Ferroelectrics Manganites Multiferroics Oxides

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Room-Temperature Processed Nb2O5 as the Electron Transporting Layer for Efficient Planar Perovskite Solar Cells

Room-Temperature Processed Nb2O5 as the Electron Transportin...

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第四届新型太阳能电池学术研讨会

作者： Xufeng Ling Jianyu Yuan Zhike Liu Wanli Ma Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University

We disclose the fabrication and characterization of high-efficiency planar perovskite solar cells（PSCs） using room-temperature sputtered niobium oxide（NbO） as the electron transporting layer（ETL）.The as sputtered amorphous NbO ETL（labeled as a-NbO） without any heat treatment can lead to an excellent power conversion efficiency（PCE） of 17.1% for planar ***, the crystalline NbO（labeled as c-NbO） with high-temperature（500 ℃） annealing results in very similar PCE of 17.2%, indicating the great advantage of a-NbO in energy *** Hall Effect measurements indicate both high mobility and conductivity for the a-NbO *** probe force microscopy（KPFM） measurements define the Fermi levels of a-NbO and c-NbO as-4.31 eV and-4.02 eV, respectively, which allow efficient electron extraction at the NbO/perovskite interface regardless of the additional heat treatment on NbO *** room-temperature processing and relatively high device performance of a-NbO suggest great potential for its application on flexible large-area solar cells and other optoelectrical devices.

关键词： Room-temperature Nb2O5 Electron transporting layer Perovskite solar cells

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synthesis of G/ - nanocomposite and its catalytic effect on the thermal decomposition of ammonium perchlorate

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Bulletin of Materials Science 2017年第4期40卷 691-698页

作者： Fertassi, Meriem Amina Liu, Qi Li, Runze Liu, Pingan Liu, Jingyuan Chen, Rong-Rong Liu, Lianhe Wang, Jun Key Laboratory of Superlight Material and Surface Technology Ministry of Education Harbin Engineering University Harbin People’s Republic of China Metal Fuel Research Institute College of Aerospace and Civil Engineering Harbin Engineering University Harbin People’s Republic of China Institute of Advanced Marine Materials Harbin Engineering University Harbin People’s Republic of China

$$\upalpha $$ - $$\hbox {Fe}_{2}\hbox {O}_{3}$$ nanoparticles were prepared by a facile hydrothermal method using ferric chloride hexahydrate ( $$\hbox {FeCl}_{3}{\cdot }$$ 6H $$_{2}\hbox {O}$$ ) as a precursor. Graphene oxide (GO) was synthesized using a modified Hummers method and graphene nanosheets (G) were successfully obtained by thermal reduction of GO. G/ $$\upalpha $$ - $$\hbox {Fe}_{2}\hbox {O}_{3}$$ nanocomposite was prepared using ex situ synthesis in the presence of $$\upalpha $$ - $$\hbox {Fe}_{2}\hbox {O}_{3}$$ nanoparticles and GO solution. The characterization of the as-prepared materials was performed using X-ray diffraction analyses and Fourier transform infrared spectroscopy; their morphology was investigated by scanning electron microscopy and transmission electron microscopy; the specific surface area ( $$S_{\mathrm{BET}}$$ ) was determined by nitrogen adsorption; their catalytic activity on the thermal decomposition of ammonium perchlorate (AP) was investigated by differential thermal analysis (DTA). The results of DTA indicated that the obtained nanomaterials contribute in ameliorating the thermal decomposition of AP; specifically, the high decomposition temperature of AP decreases from 432 to 380 $$^{\circ }$$ C. A significant decrease in the activation energy was also achieved in the presence of these nanomaterials, and the mixture of ammonium perchlorate with G/ $$\upalpha $$ - $$\hbox {Fe}_{2}\hbox {O}_{3}$$ showed the lowest value (from 129 to $$80.33\,\hbox {kJ}\,\hbox {mol}^{-1}$$ ). Graphene (G), $$\upalpha $$ - $$\hbox {Fe}_{2}\hbox {O}_{3}$$ nanoparticles and G/ $$\upalpha $$ - $$\hbox {Fe}_{2}\hbox {O}_{3}$$ nanocomposite are successfully obtained using a simple hydrothermal method. The results of DTA show that the G/ $$\upalpha $$ - $$\hbox {Fe}_{2}\hbox {O}_{3}$$ nanocomposite displays the best catalytic activity in enhancing the thermal decomposition of ammonium perchlorate by reducing its HTD from 432 $$^{\circ }$$ C to 380 $$^

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