Maciej.bazarnik

Author(s): H. Shichibe, Y. Satake, K. Watanabe, A. Kinjyo, A. Kunihara, Y. Yamada, M. Sasaki, W. W. Hayes, and J. R. Manson

We demonstrate that highly surface-sensitive supersonic rare-gas (He, Ar, and Xe) atom scattering, in both the quantum and classical regimes, can probe and quantify the interlayer interactions between graphene monolayers and metal substrates in terms of the Debye temperature corresponding to the sur...

[Phys. Rev. B 91, 155403] Published Mon Apr 06, 2015

Author(s): Matthias Emmrich, Maximilian Schneiderbauer, Ferdinand Huber, Alfred J. Weymouth, Norio Okabayashi, and Franz J. Giessibl

We study the physics of atomic manipulation of CO on a Cu(111) surface by combined scanning tunneling microscopy and atomic force microscopy at liquid helium temperatures. In atomic manipulation, an adsorbed atom or molecule is arranged on the surface using the interaction of the adsorbate with subs…

[Phys. Rev. Lett. 114, 146101] Published Mon Apr 06, 2015

Author(s): Liwei Liu, Kai Yang, Yuhang Jiang, Boqun Song, Wende Xiao, Shiru Song, Shixuan Du, Min Ouyang, Werner A. Hofer, Antonio H. Castro Neto, and Hong-Jun Gao

The magnetic structure of a magnetic metal-organic complex on a gold surface can be mapped by exploring the field dependence of the extended Kondo effect.

[Phys. Rev. Lett. 114, 126601] Published Tue Mar 24, 2015

Small-molecule synthesis usually relies on procedures that are highly customized for each target. A broadly applicable automated process could greatly increase the accessibility of this class of compounds to enable investigations of their practical potential. Here we report the synthesis of 14 distinct classes of small molecules using the same fully automated process. This was achieved by strategically expanding the scope of a building block–based synthesis platform to include even Csp3-rich polycyclic natural product frameworks and discovering a catch-and-release chromatographic purification protocol applicable to all of the corresponding intermediates. With thousands of compatible building blocks already commercially available, many small molecules are now accessible with this platform. More broadly, these findings illuminate an actionable roadmap to a more general and automated approach for small-molecule synthesis. Authors: Junqi Li, Steven G. Ballmer, Eric P. Gillis, Seiko Fujii, Michael J. Schmidt, Andrea M. E. Palazzolo, Jonathan W. Lehmann, Greg F. Morehouse, Martin D. Burke

Article

Bottom-up synthesis of nanographenes is highly desirable. Here, the authors report one-shot annulative π -extension reactions that occur at the convex armchair edge of polycyclic aromatic hydrocarbons, and show that unfunctionalized precursors can be used for π -component assembly and extension.

Nature Communications doi: 10.1038/ncomms7251

Authors: Kyohei Ozaki, Katsuaki Kawasumi, Mari Shibata, Hideto Ito, Kenichiro Itami

Author(s): M. Misiorny, E. Burzurí, R. Gaudenzi, K. Park, M. Leijnse, M. R. Wegewijs, J. Paaske, A. Cornia, and H. S. J. van der Zant

By means of electronic transport, we study the transverse magnetic anisotropy of an individual Fe₄ single-molecule magnet (SMM) embedded in a three-terminal junction. In particular, we determine in situ the transverse anisotropy of the molecule from the pronounced intensity modulations of the linear...

[Phys. Rev. B 91, 035442] Published Fri Jan 30, 2015

Author(s): Hajo Söde, Leopold Talirz, Oliver Gröning, Carlo Antonio Pignedoli, Reinhard Berger, Xinliang Feng, Klaus Müllen, Roman Fasel, and Pascal Ruffieux

The electronic structure of atomically precise armchair graphene nanoribbons of width N=7 (7-AGNRs) are investigated by scanning tunneling spectroscopy (STS) on Au(111). We record the standing waves in the local density of states of finite ribbons as a function of sample bias and extract the dispers...

[Phys. Rev. B 91, 045429] Published Fri Jan 23, 2015

A recent study claimed that heavy use of equations impedes communication among biologists, as measured by the ability to attract citations from peers. It was suggested that to increase the probability of being cited one should reduce the density of equations in papers, that equations should be moved to appendices, and that math training among biologists should be improved. Here, we report a detailed study of the citation habits among physicists, a community that has traditionally strong training and dependence on mathematical formulations. Is it possible to correlate statistical citation patterns and fear of mathematics in a community whose work strongly depends on equations? By performing a systematic analysis of the citation counts of papers published in one of the leading journals in physics covering all its disciplines, we find striking similarities with distribution of citations recorded in biological sciences. However, based on the standard deviations in citation data of bo...

Author(s): N. Kumada, P. Roulleau, B. Roche, M. Hashisaka, H. Hibino, I. Petković, and D. C. Glattli

We investigate resonant edge magnetoplasmons (EMPs) and their decay in graphene by high-frequency electronic measurements. From EMP resonances in disk shaped graphene, we show that the dispersion relation of EMPs is nonlinear due to interactions, giving rise to the intrinsic decay of EMP wave packet...

[Phys. Rev. Lett. 113, 266601] Published Mon Dec 22, 2014

Author(s): Jan Girovsky, Kartick Tarafder, Christian Wäckerlin, Jan Nowakowski, Dorota Siewert, Tatjana Hählen, Aneliia Wäckerlin, Armin Kleibert, Nirmalya Ballav, Thomas A. Jung, and Peter M. Oppeneer

We report the discovery of an antiferromagnetic coupling of the magnetic moment of chromium(II) tetraphenyl-porphyrin (CrTPP) molecules to the magnetization of the clean ferromagnetic Co(001) substrate. We assign this unusual molecule-substrate exchange coupling to the less than half-filled chromium...

[Phys. Rev. B 90, 220404] Published Wed Dec 10, 2014

Article

Crown ethers have been used as strong and selective binders for alkali metals and other cations since their discovery. Here the authors observe crown ether type structures in partially oxidized graphene and through simulations predict that they have similar abilities to selectively bind cations.

Nature Communications doi: 10.1038/ncomms6389

Authors: Junjie Guo, Jaekwang Lee, Cristian I. Contescu, Nidia C. Gallego, Sokrates T. Pantelides, Stephen J. Pennycook, Bruce A. Moyer, Matthew F. Chisholm