Nature Materials contents: July 2014 Volume 13 Number 7 pp 663-756

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Advertisement Select Si, Ge, Au and more for Advanced FIB Nanofabrication! ionLiNE's new Multi-Species Ion Beam Technology: Range of Ion Species for Imaging, High Resolution Patterning & Machining, Specific Functionalization & Low Contamination. Visit Raith and learn more about FIB Nanofabrication and ionLiNE's new Multi-Species Ion Beam Technology. TABLE OF CONTENTS July 2014 Volume 13, Issue 7 Editorial Research Highlights News and Views Letters Articles Corrigendum Erratum Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement Scientific Reports Fast and simple publishing! Visit our Guide to Authors page to find out more.  nature.com/scientificreports   Editorial Top Debated waters   p663 doi:10.1038/nmat4029 New experiments and computer simulations on how water behaves when it is supercooled are poised to rekindle long-standing debates. Research Highlights Top Durable delivery | Wide angle vision | The importance of coherence | E-cadherin-guided migration | 3D skyrmion imaging News and Views Top Cuprate superconductors: Dynamic stabilization?   pp665 - 666 N. Peter Armitage doi:10.1038/nmat3995 Enhancing the temperature at which superconductivity is observed is a long-standing objective for materials scientists. Recent tantalizing experiments suggest a possible route for achieving this. See also: Article by Hu et al. Nanoscale friction: Sliding charges   pp666 - 668 Robert Szoszkiewicz and Elisa Riedo doi:10.1038/nmat4020 In contrast to the ultralow friction that exists between carbon layers in multiwalled carbon nanotubes, multiwalled boron nitride nanotubes are found to exhibit ultrahigh interlayer friction as a result of their ionic character. See also: Letter by Niguès et al. Material witness: The clean air act   p668 Philip Ball doi:10.1038/nmat4016 Organic polaritons: Long-distance relationships   pp669 - 670 Russell J. Holmes doi:10.1038/nmat3986 By embedding organic dyes in a suitably designed optical microcavity it is possible to strongly mix light and matter excitations, forming states known as microcavity polaritons. These hybrid light–matter states are used to demonstrate energy transfer between organic molecules over long distances. See also: Article by Coles et al. Crystal nucleation: Zeroing in on ice   pp670 - 671 Ben Slater and David Quigley doi:10.1038/nmat4017 Computer simulations show that cubic and hexagonal ices nucleate through the formation of a tetragonal metastable ice phase. See also: Article by Russo et al. Supercooled water: Continuous trends   pp671 - 673 Alan K. Soper doi:10.1038/nmat4019 X-ray scattering measurements of liquid water down to temperatures at which it spontaneously converts to ice show no signs of the much debated transition from high-density to low-density structural order. Supercooled water: Two phases?   pp673 - 675 C. Austen Angell doi:10.1038/nmat4022 Simulations of a well-studied model of water provide strong support for the coexistence of two distinct metastable liquid-water phases, a long-debated possibility that experiments on supercooled water at negative pressures may be able to confirm. Nature Materials JOBS of the week Postdoc: Dynamics of Excitons and Charge carriers in Two-Dimensional Materials Beyond Graphene TU Delft PhD scholarship in development of new inorganic materials and concepts for Li and Na ion batteries Istituto Italiano di Tecnologia (IIT) Fabrication of TiO2 and Ag nanoparticles based LbL assemblies for photocatalytic applications Centre National de la Recherche Scientifique (CNRS) Up to 21 Postdoctoral Positions The University of Adelaide Postdoctoral position in organic bioelectronics Istituto Italiano di Tecnologia (IIT) More Science jobs from Nature Materials EVENT The Energy & Materials Research Conference - EMR2015 25.02.14 Madrid, Spain More science events from Letters Top A stable three-dimensional topological Dirac semimetal Cd3As2   pp677 - 681 Z. K. Liu, J. Jiang, B. Zhou, Z. J. Wang, Y. Zhang, H. M. Weng, D. Prabhakaran, S-K. Mo, H. Peng, P. Dudin, T. Kim, M. Hoesch, Z. Fang, X. Dai, Z. X. Shen, D. L. Feng, Z. Hussain and Y. L. Chen doi:10.1038/nmat3990 A state of matter known as a three-dimensional Dirac semimetal has latterly garnered significant theoretical and experimental attention. Using angle-resolved photoelectron spectroscopy, it is shown that Cd3As2 is an experimental realization of a three-dimensional Dirac semimetal that is stable at ambient conditions. Intense low-energy ferromagnetic fluctuations in the antiferromagnetic heavy-fermion metal CeB6   pp682 - 687 Hoyoung Jang, G. Friemel, J. Ollivier, A. V. Dukhnenko, N. Yu. Shitsevalova, V. B. Filipov, B. Keimer and D. S. Inosov doi:10.1038/nmat3976 Cerium hexaboride is a canonical heavy-fermion system that has come under scrutiny because of its so-called hidden order phase. Now, detailed inelastic neutron scattering experiments reveal an intense ferromagnetic mode, thus overturning the generally accepted view that antiferromagnetic interactions dominate the low-temperature behaviour of this system. Ultrahigh interlayer friction in multiwalled boron nitride nanotubes   pp688 - 693 A. Niguès, A. Siria, P. Vincent, P. Poncharal and L. Bocquet doi:10.1038/nmat3985 Carbon nanotubes (CNTs) and boron nitride nanotubes (BNNTs) have similar surface crystallography and mechanical properties. It is now shown that the interlayer sliding friction in multilayer CNTs and BNNTs is, however, different: whereas the telescopic sliding of semi-metallic multiwalled CNTs is known to be vanishingly small, multiwalled insulating BNNTs exhibit ultrahigh interlayer friction that is proportional to the contact area—a result ascribed to the ionic character of boron nitride. See also: News and Views by Szoszkiewicz & Riedo Electrostatic control of block copolymer morphology   pp694 - 698 Charles E. Sing, Jos W. Zwanikken and Monica Olvera de la Cruz doi:10.1038/nmat4001 Block copolymers can self-assemble into nanostructures that simultaneously facilitate ion transport and provide mechanical stability. Highly asymmetric charge cohesion effects are now shown to induce the formation of nanostructures with percolated phases desired for ion transport. This strategy could lead to the design of enhanced battery electrolyte materials. Articles Top Magnetization switching through giant spin–orbit torque in a magnetically doped topological insulator heterostructure   pp699 - 704 Yabin Fan, Pramey Upadhyaya, Xufeng Kou, Murong Lang, So Takei, Zhenxing Wang, Jianshi Tang, Liang He, Li-Te Chang, Mohammad Montazeri, Guoqiang Yu, Wanjun Jiang, Tianxiao Nie, Robert N. Schwartz, Yaroslav Tserkovnyak and Kang L. Wang doi:10.1038/nmat3973 Heterostructures consisting of ferromagnets and heavy metals have become a focus of interest because their strong spin–orbit coupling allows for efficient current-induced magnetization switching phenomena. Now, a magnetically doped topological insulator bilayer is shown to display a range of appealing characteristics for current-induced magnetization switching, including a significantly enhanced efficiency. Optically enhanced coherent transport in YBa2Cu3O6.5 by ultrafast redistribution of interlayer coupling   pp705 - 711 W. Hu, S. Kaiser, D. Nicoletti, C. R. Hunt, I. Gierz, M. C. Hoffmann, M. Le Tacon, T. Loew, B. Keimer and A. Cavalleri doi:10.1038/nmat3963 Mode-selective vibrational excitations can be used to transiently induce a range of phenomena in strongly correlated states of matter. It is now shown that by exciting apical oxygen distortions in the cuprate system YBa2Cu3O6.5, an unusual photoconductive effect is induced both at low and at high temperatures. See also: News and Views by Armitage Polariton-mediated energy transfer between organic dyes in a strongly coupled optical microcavity   pp712 - 719 David M. Coles, Niccolo Somaschi, Paolo Michetti, Caspar Clark, Pavlos G. Lagoudakis, Pavlos G. Savvidis and David G. Lidzey doi:10.1038/nmat3950 The energy interaction between different exciton species is affected by the optical environment in which they are embedded. It is now shown that mixed exciton–polariton states in strongly coupled microcavities can facilitate energy transfer between organic dyes at length scales greater than the Förster transfer radius. See also: News and Views by Holmes Engineering of light confinement in strongly scattering disordered media   pp720 - 725 Francesco Riboli, Niccolò Caselli, Silvia Vignolini, Francesca Intonti, Kevin Vynck, Pierre Barthelemy, Annamaria Gerardino, Laurent Balet, Lianhe H. Li, Andrea Fiore, Massimo Gurioli and Diederik S. Wiersma doi:10.1038/nmat3966 Disordered photonic materials have the ability to control the flow of light through random multiple scattering. This has the drawback of randomizing both the direction and phase of the propagating light. Now, confined and interacting light modes are demonstrated for a two-dimensional disordered photonic structure. Anion charge storage through oxygen intercalation in LaMnO3 perovskite pseudocapacitor electrodes   pp726 - 732 J. Tyler Mefford, William G. Hardin, Sheng Dai, Keith P. Johnston and Keith J. Stevenson doi:10.1038/nmat4000 Perovskite oxides have attracted significant attention as energy conversion materials owing to their unique physical and electronic properties. Anion-based intercalation pseudocapacitance as well as oxygen intercalation in a nanostructured lanthanum-based perovskite (LaMnO3) have now been exploited for fast energy storage. New metastable form of ice and its role in the homogeneous crystallization of water   pp733 - 739 John Russo, Flavio Romano and Hajime Tanaka doi:10.1038/nmat3977 At sufficiently low temperature, liquid water crystallizes into ices with cubic or hexagonal symmetry. A simulation study now shows that the nucleation of water into atomic stackings of cubic and hexagonal ices occurs through a metastable precursor phase with tetragonal symmetry, and that this scenario provides an explanation for the unusual pressure dependence of water’s homogeneous crystal-nucleation temperature. See also: News and Views by Slater & Quigley In situ micropillar compression reveals superior strength and ductility but an absence of damage in lamellar bone   pp740 - 747 Jakob Schwiedrzik, Rejin Raghavan, Alexander Bürki, Victor LeNader, Uwe Wolfram, Johann Michler and Philippe Zysset doi:10.1038/nmat3959 The fracture behaviour of micro- and macroscale bone is shown to be different. In situ micropillar compression experiments on ovine bone demonstrate that microscale lamellar bone is strong and ductile, and shows no damage, whereas on the macroscale, bone shows little ductility and fails in a quasi-brittle manner. Bacteria-instructed synthesis of polymers for self-selective microbial binding and labelling   pp748 - 755 E. Peter Magennis, Francisco Fernandez-Trillo, Cheng Sui, Sebastian G. Spain, David J. Bradshaw, David Churchley, Giuseppe Mantovani, Klaus Winzer and Cameron Alexander doi:10.1038/nmat3949 Enzymes involved in copper metabolism and residing within bacterial outer layers are used to polymerize monomers bound to the bacterial cell surface. The composition of the polymers is affected by templating processes and hence the polymers are specific binding agents for the bacteria on which they are grown. Corrigendum Top Corrigendum: Singular robust room-temperature spin response from topological Dirac fermions   p756 Lukas Zhao, Haiming Deng, Inna Korzhovska, Zhiyi Chen, Marcin Konczykowski, Andrzej Hruban, Vadim Oganesyan and Lia Krusin-Elbaum doi:10.1038/nmat4011 Erratum Top Erratum: Materials as stem cell regulators   p756 William L. Murphy, Todd C. McDevitt and Adam J. Engler doi:10.1038/nmat4013 Top Advertisement NEW DEALS: Lab equipment and services Browse our library of savings and information! Check Marketplace first  VISIT MARKETPLACE TODAY      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. 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