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Advertisement npj Materials Degradation is a new open access journal that is now open for submissions. The journal publishes the finest content describing basic and applied research discoveries in the area of corrosion (degradation) and protection of materials. Sign up for article e-alerts >> TABLE OF CONTENTS September 2017 Volume 13, Issue 9 Editorials Commentary Thesis Research Highlights News and Views Progress Article Letters Articles Measure for Measure   Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement Publishing online monthly, Nature Astronomy aims to bring together astronomers, astrophysicists and planetary scientists. In addition to the latest advances in research, we offer Comment and Opinion pieces on topical subjects of relevance to our community, including the societal impact of astronomy and updates on telescopes and space missions.  SUBMIT YOUR RESEARCH TODAY   Editorials Top The power of universal pictures   p821 doi:10.1038/nphys4266 The sky map presented by the Dark Energy Survey showcases the power of images to reach scientists and the wider public alike.   Physics students unite   p821 doi:10.1038/nphys4267 The International Conference of Physics Students continues its remarkable tradition.   Commentary Top Time to fix science prizes   p822 Shivaji Sondhi and Steven Kivelson doi:10.1038/nphys4246 Science prizes should better reflect how modern science is carried out, argue Shivaji Sondhi and Steven Kivelson.   Thesis Top The risks of accelerated change   p823 Mark Buchanan doi:10.1038/nphys4249   Research Highlights Top Quantum dynamics: A new spin on lensing | Theoretical ecology: Sea fairies | Cosmology: A changing constant? | Biophysics: Not hairy enough | Ultracold gases: Reveal the unseen News and Views Top Exciton-polaritons: In full flow   pp825 - 826 Thilo Stöferle doi:10.1038/nphys4176 Flow without friction is a strange phenomenon usually seen in quantum fluids that are cooled to temperatures near absolute zero, but features of superfluidity have now been seen with polaritons at ambient conditions. See also: Letter by Lerario et al. History of physics: When quantum mechanics became huge   p826 Andreas Trabesinger doi:10.1038/nphys4255   Heavy ion collisions: A clash of photons   pp827 - 828 Spencer R. Klein doi:10.1038/nphys4239 The ATLAS Collaboration observed photons elastically scattering from other photons — an effect predicted by quantum electrodynamics over 80 years ago.   Physics JOBS of the week Postdoc position in experimental materials physics Norwegian University of Science and Technology (NTNU) Post-doctoral position / Scientist (m / f) in Physics / Chemistry Leibniz Institut für Analytische Wissenschaften - ISAS - e.V. Professor and Head of Physics University of Bristol Faculty Positions in the Department of Physics Southern University of Science and Technology (SUSTech) More Science jobs from Physics EVENT Physics of Life Town Meeting 02.10.17 London, UK More science events from Progress Article Top Spin conversion on the nanoscale   pp829 - 832 YoshiChika Otani, Masashi Shiraishi, Akira Oiwa, Eiji Saitoh and Shuichi Murakami doi:10.1038/nphys4192 Spins can act as mediators to interconvert electricity, light, sound, vibration and heat. This Progress article gives an overview of the recent advances associated with nanoscale spin conversion.   Letters Top Rotational superradiant scattering in a vortex flow   pp833 - 836 Theo Torres, Sam Patrick, Antonin Coutant, Mauricio Richartz, Edmund W. Tedford et al. doi:10.1038/nphys4151 The amplification of waves reflected from a rotating obstacle, or superradiance, has been predicted in hydrodynamics and black-hole physics. An experiment with rotating vortex flows confirms this phenomenon.   Room-temperature superfluidity in a polariton condensate   pp837 - 841 Giovanni Lerario, Antonio Fieramosca, Fábio Barachati, Dario Ballarini, Konstantinos S. Daskalakis et al. doi:10.1038/nphys4147 Superfluidity is a phenomenon usually restricted to cryogenic temperatures, but organic microcavities provide the conditions for a superfluid flow of polaritons at room temperature. See also: News and Views by Stoferle Direct optical detection of Weyl fermion chirality in a topological semimetal   pp842 - 847 Qiong Ma, Su-Yang Xu, Ching-Kit Chan, Cheng-Long Zhang, Guoqing Chang et al. doi:10.1038/nphys4146 Measuring the photocurrent response to circularly polarized mid-infrared light provides direct access to the chirality of Weyl fermions in Weyl semimetals — the property responsible for a range of exotic phenomena.   Numerical test of the Edwards conjecture shows that all packings are equally probable at jamming   pp848 - 851 Stefano Martiniani, K. Julian Schrenk, Kabir Ramola, Bulbul Chakraborty and Daan Frenkel doi:10.1038/nphys4168 A decades-old proposal that all distinct packings are equally probable in granular media has gone unproven due to the sheer number of packings involved. Numerical simulation now demonstrates that it holds — precisely at the jamming threshold.   Advertisement Nature Reviews Materials is an online-only, materials science journal that provides an accurate and balanced discussion on a chosen topic, together with an authoritative voice from experienced researchers. Spanning physics, chemistry, biology and engineering, the journal publishes a broad range of Reviews and Comments from world-leading scientists. EXPLORE THE JOURNAL NOW   Articles Top Evidence for light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC OPEN   pp852 - 858 ATLAS Collaboration doi:10.1038/nphys4208 Quantum electrodynamics predicts a rare process in which light is scattered by light. The ATLAS Collaboration reports signs of this elusive effect in the collisions of ultra-relativistic lead ions. See also: News and Views by Klein Spectroscopic evidence of a new energy scale for superconductivity in H3S   pp859 - 863 F. Capitani, B. Langerome, J.-B. Brubach, P. Roy, A. Drozdov et al. doi:10.1038/nphys4156 A spectroscopic study of the superconducting phase in sulfur hydride under extreme pressures is presented, revealing the energy scale for the electron–phonon interaction in this system.   Large orbital polarization in a metallic square-planar nickelate   pp864 - 869 Junjie Zhang, A. S. Botana, J. W. Freeland, D. Phelan, Hong Zheng et al. doi:10.1038/nphys4149 A careful study of the low-valent, quasi-two-dimensional trilayer metallic nickelate Pr4Ni3O8 is presented, revealing this system to be a close analogue of cuprate systems, and offering tantalizing hope that it may superconduct if appropriate electron doping can be achieved.   Direct measurement of polariton–polariton interaction strength   pp870 - 875 Yongbao Sun, Yoseob Yoon, Mark Steger, Gangqiang Liu, Loren N. Pfeiffer et al. doi:10.1038/nphys4148 Exciton–polariton condensates have garnered interest as a means to access macroscopic displays of quantum phenomena such as Bose–Einstein condensation and superfluidity. In this work, a direct measure of the polariton–polariton interaction is obtained.   Microwave spectroscopy of spinful Andreev bound states in ballistic semiconductor Josephson junctions   pp876 - 881 David J. van Woerkom, Alex Proutski, Bernard van Heck, Daniël Bouman, Jukka I. Väyrynen et al. doi:10.1038/nphys4150 Andreev bound states in semiconductor–superconductor hybrid structures are studied using microwave spectroscopy — a tool that could be also used for investigating Majorana modes.   Controlled release of multiphoton quantum states from a microwave cavity memory   pp882 - 887 Wolfgang Pfaff, Christopher J. Axline, Luke D. Burkhart, Uri Vool, Philip Reinhold et al. doi:10.1038/nphys4143 The ability to transfer quantum information from a memory to a flying qubit is important for building quantum networks. The very fast release of a multiphoton state in a microwave cavity memory into propagating modes is demonstrated.   Gate-tunable black phosphorus spin valve with nanosecond spin lifetimes   pp888 - 893 Ahmet Avsar, Jun Y. Tan, Marcin Kurpas, Martin Gmitra, Kenji Watanabe et al. doi:10.1038/nphys4141 The injection, transport and manipulation of spins using electric fields in ultrathin films of black phosphorus show the potential of this material as a platform for two-dimensional semiconductor spintronics devices.   Spin-polarized exciton quantum beating in hybrid organic–inorganic perovskites   pp894 - 899 Patrick Odenthal, William Talmadge, Nathan Gundlach, Ruizhi Wang, Chuang Zhang et al. doi:10.1038/nphys4145 Hybrid perovskites are known to have excellent optoelectronic properties, but the observation of exciton states with long spin lifetimes suggests that they may also have potential spintronics applications.   Separating the configurational and vibrational entropy contributions in metallic glasses   pp900 - 905 Hillary L. Smith, Chen W. Li, Andrew Hoff, Glenn R. Garrett, Dennis S. Kim et al. doi:10.1038/nphys4142 When a glass transforms into a liquid, is the absorbed specific heat vibrational or configurational in origin? Vibrational spectroscopy experiments on strong and fragile metallic glasses now strongly suggest the latter.   Membrane fluctuations mediate lateral interaction between cadherin bonds   pp906 - 913 Susanne F. Fenz, Timo Bihr, Daniel Schmidt, Rudolf Merkel, Udo Seifert et al. doi:10.1038/nphys4138 The proteins that adhere cells together in tissue assemble in domains near the cell–cell interface. Experiments, simulations and theory show that formation of these domains is regulated by the membrane itself — with an explicit role for fluctuations.   Dynamic scaling in natural swarms   pp914 - 918 Andrea Cavagna, Daniele Conti, Chiara Creato, Lorenzo Del Castello, Irene Giardina et al. doi:10.1038/nphys4153 Swarms and statistical physics seem like natural bedfellows, but concepts like scaling are yet to prove directly applicable to insect group dynamics. A study of midges suggests they are, and that they may give rise to a new universality class.   Advertisement An open access, online-only, multidisciplinary research journal dedicated to publishing the most important scientific advances in the life sciences, physical sciences, and engineering fields that are facilitated by spaceflight and analogue platforms. Explore the benefits of submitting your next research article.   Measure for Measure Top To catch a chameleon   p920 Tobias Jenke doi:10.1038/nphys4250 High-precision laboratory experiments with neutrons and atoms are converging to a verdict on 'chameleon fields' as a possible explanation of dark energy, explains Tobias Jenke.   Top Natureevents is a fully searchable, multi-disciplinary database designed to maximise exposure for events organisers. The contents of the Natureevents Directory are now live. The digital version is available here. Find the latest scientific conferences, courses, meetings and symposia on natureevents.com. For event advertising opportunities across the Nature Publishing Group portfolio please contact natureevents@nature.com More Nature Events

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