Controlling topology with strain

PostprintPeer reviewe

Investigating the Apparent Seismic Diffusivity of Near-Receiver Geology at Mount St. Helens Volcano, USA

Acknowledgments: The SAGES VALIDATE forum provided travel money for the discussion of the methodology within De Siena and Benson.Peer reviewedPublisher PD

Simulating Autonomous Mobile Programs on Networks

Autonomous mobile programs (AMPs) have been proposed for load management in dynamic networks. An AMP is aware of its resource needs and periodically seeks a better location in the network to reduce execution time. AMPs have previously been measured using mobile Java Voyager on local area networks (LANs). We have constructed a simulation model of AMPs and reproduced 4 sets of experiments on homogeneous networks, i.e. networks where all locations have the same processor speed, and 2 sets of experiments on heterogeneous networks with collection of large and small AMPs. The results show that simulated collections of AMPs obtain similar balanced states to those reached in the real experiments, and have only minor differences from real experimental results. The simulation model gives an opportunity to explore the greedy effect that can be observed in the real experiments. This gives us confidence to apply the simulation model for further investigation of AMP behaviour, including behaviours on wide area networks

The Ursinus Weekly, May 6, 1957

May Day pageant Sat., 2:30 P.M.; Band concert and play scheduled • Concert by Band and Meistersingers • Co-chairmen chosen for 1958 Campus Chest fund • Alpha Phi Omega election; Banquet planned for May • Curtain Club to give Sabrina Fair • Chem prize awarded to Robert Engel for paper • Proctor system and discipline topics at MSGA meeting • MSGA elections held Thurs., May 2 • Pre-medders elect officers • YW-YMCA retreat May 3-5; Commissions plan programs • YM-YW hears Hess on visit to Russia • Meistersingers tour a success; Give concert May 3 • Famous artist to speak in Schwenksville, May 9 • Six Chi Alpha seniors accepted at seminaries • Waiters banquet held April 30 • Newman Club holds breakfast • Delta Pi Sigma\u27s new brothers • Editorial: Time for reflection • Politics • Apathy • Population: A problem • Fifty-four forty or fight or politics • Bears defeat PMC; Lose to Garnets, Fords and Hens • Bears place 6th, 8th in Penn Relays • Garnets defeat Bears; Four new records are set • Belles net team wins 3 matches; Lose tournament • Buggeln, Lawhead, Carney star in meet with F & M • Batmen\u27s record now eight wins; Slaughtered Dickinson Saturday 7-0 • Zeta Chi elects new officers • Library receives bookshttps://digitalcommons.ursinus.edu/weekly/1428/thumbnail.jp

Angle, spin, and depth resolved photoelectron spectroscopy on quantum materials

PK gratefully acknowledges The Royal Society for support.The role of X-ray based electron spectroscopies in determining chemical, electronic, and magnetic properties of solids has been well-known for several decades. A powerful approach is angle-resolved photoelectron spectroscopy, whereby the kinetic energy and angle of photoelectrons emitted from a sample surface are measured. This provides a direct measurement of the electronic band structure of crystalline solids. Moreover, it yields powerful insights into the electronic interactions at play within a material and into the control of spin, charge, and orbital degrees of freedom, central pillars of future solid state science. With strong recent focus on research of lower-dimensional materials and modified electronic behavior at surfaces and interfaces, angle-resolved photoelectron spectroscopy has become a core technique in the study of quantum materials. In this review, we provide an introduction to the technique. Through examples from several topical materials systems, including topological insulators, transition metal dichalcogenides, and transition metal oxides, we highlight the types of information which can be obtained. We show how the combination of angle, spin, time, and depth-resolved experiments are able to reveal “hidden” spectral features, connected to semiconducting, metallic and magnetic properties of solids, as well as underlining the importance of dimensional effects in quantum materials.PostprintPeer reviewe

Electron doping as a handle to increase the Curie temperature in ferrimagnetic Mn3Si2X6 (X=Se, Te)

Funding: L.Q. acknowledges the support of China Scholarship Council. P.B. and S.P. acknowledge financial support from the Italian Ministry for Research and Education through PRIN-2017 projects ‘Tuning and understanding Quantum phases in 2D materials—Quantum 2D’ (IT-MIUR Grant No. 2017Z8TS5B) and ’ToWards fErroElectricity in Two dimensions- TWEET’ (IT-MIUR Grant No. 2017YCTB59), respectively. P.K. and S.P. acknowledge support from the Royal Society through the International Exchange grant IEC\R2\222041. PK acknowledges support from The Leverhulme Trust via Grant No. RL-2016-006, and the UK Engineering and Physical Sciences Research Council via Grant No. EP/X015556/1.By analysing the results of ab initio simulations performed for Mn3Si2X6 (X=Se, Te), we first discuss the analogies and the differences in electronic and magnetic properties arising from the anion substitution, in terms of size, electronegativity, band widths of p electrons and spin-orbit coupling strengths. For example, through mean-field theory and simulations based on density functional theory, we demonstrate that magnetic frustration, known to be present in Mn3Si2Te6, also exists in Mn3Si2Se6 and leading to a ferrimagnetic ground state. Building on these results, we propose a strategy, electronic doping, to reduce the frustration and thus to increase the Curie temperature (TC). To this end, we first study the effect of electronic doping on the electronic structure and magnetic properties and discuss the differences in the two compounds, along with their causes. Secondly, we perform Monte Carlo simulations, considering from first to fifth nearest-neighbor magnetic interactions and single-ion anisotropy, and show that electron doping efficiently raises the TC.PostprintPeer reviewe

Epitaxial growth of AgCrSe2 thin films by molecular beam epitaxy

Funding: The authors gratefully acknowledge the European Research Council (through the QUESTDO project, 714193) and The Leverhulme Trust (Grant No. RL-2016-006) for support. The MBE growth facility was funded through an EPSRC strategic equipment grant: EP/M023958/1. The research leading to this result has been supported by the project CALIPSO under Grant Agreement 312284 from the EU Seventh Framework Programme (FP7/2007-2013).AgCrSe2 exhibits remarkably high ionic conduction, an inversion symmetry-breaking structural transition, and is host to complex non-colinear magnetic orders. Despite its attractive physical and chemical properties, and its potential for technological applications, studies of this compound to date are focused almost exclusively on bulk samples. Here, we report the growth of AgCrSe2 thin films via molecular beam epitaxy. Single-orientated epitaxial growth was confirmed by X-ray diffraction, while resonant photoemission spectroscopy measurements indicate a consistent electronic structure as compared to bulk single crystals. We further demonstrate significant flexibility of the grain morphology and cation stoichiometry of this compound via control of the growth parameters, paving the way for the targeted engineering of the electronic and chemical properties of AgCrSe2 in thin-film form.Publisher PDFPeer reviewe

Prospectus, October 3, 1979

PC HEAD COUNT RECORD HIGH; Letter to editor: Rebuttal to election apathy; Real estate workshop; Estate taxes, wills trusts workshop; Dracula cast chosen; Workshops offered in non-traditional careers; Food Service prposed; Parkland Food Survey; Phi Beta Lambda meets; Community Recycling Center wants recycleable material; Youth Symphony auditioning; Sigma Theta Phi has poor turnout; Bicycling C-U style; Bicycle problems; Krannert presents theatrics; Monticello Council makes inquiries; Financial Aid Office offers two reliefs; No, this isn\u27t London fog; Photography exceeds; WPCD-FM celebrates L. Skynyrd; PC station plans 20 new shows; DA Program under way; Pet advice available now; Arts Weel in Illinois this Saturday; Krannert events listed; Weekend accident claims Parkland student\u27s life; Artist awaits Autumn; Classifieds; Submit originals NOW!; Oktoberfest celebrated in Atwood Arthur Knights vs. The Rajahs; Assertiveness for Elderly; Reviews: Album buying advice/guide, Thorogood\u27s newest album; Alan Alda\u27s latest effort: \u27The Eduction of Joe Tynan\u27; Spikers look to rebound; Freddy banishes Frank; Fast Freddy Contest; Frisbee show Oct. 9-11 a.m.; Intramurals beginhttps://spark.parkland.edu/prospectus_1979/1010/thumbnail.jp

Announcing the Electromagnetic Articulography (Day 1) Subset of the mngu0 Articulatory Corpus

This paper serves as an initial announcement of the availability of a corpus of articulatory data called mngu0. This corpus will ultimately consist of a collection of multiple sources of articulatory data acquired from a single speaker: electromagnetic articulography (EMA), audio, video, volumetric MRI scans, and 3D scans of dental impressions. This data will be provided free for research use. In this first stage of the release, we are making available one subset of EMA data, consisting of more than 1,300 phonetically diverse utterances recorded with a Carstens AG500 electromagnetic articulograph. Distribution of mngu0 will be managed by a dedicated “forum-style ” web site. This paper both outlines the general goals motivating the distribution of the data and the creation of the mngu0 web forum, and also provides a description of the EMA data contained in this initial release

WZ Sagittae as a DQ Herculis star

We argue that quiescent WZ Sge is a rapidly spinning magnetic rotator in which most of the matter transfered from the secondary is ejected from the system. Assuming that the observed 27.87 s oscillation period is due to the spinning white dwarf we propose that the other observed principal period of 28.96 s is a beat due to reprocessing of the rotating white dwarf beam on plasma blobs in Keplerian rotation at the outer disc rim. The weaker, transient, 29.69 s period is identified as a beat with the Keplerian period of the magnetosphere. WZ Sge evolves through a cycle of spin-up and spin-down phases. During the spin-down phase it is a DQ Her star, during the spin-up phase it should be a ER UMa star.Comment: 8 pages, 5 figures; accepted for publication in MNRA