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You searched on: Topic Area: Physics

Displaying records 21 to 30 of 319 records.
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21. Linear relation between Heisenberg exchange and interfacial Dzyaloshinskii‹Moriya interaction in metal films
Topic: Physics
Published: 8/3/2015
Authors: Hans Toya Nembach, Justin M Shaw, Mathias A. Weiler, Emilie Marie Jue, Thomas J Silva
Abstract: Proposals for novel spin-orbitronic logic and memory devices are often dependent on assumptions as to how materials with large spin-orbit and ferromagnets interact when in contact. Such interactions give rise to a host of novel phenomena, such as ...

22. Development of an Ultra-Pure, Carrier-Free 209Po Solution Standard
Series: Journal of Research (NIST JRES)
Topic: Physics
Published: 7/23/2015
Authors: Ronald Colle, Ryan P Fitzgerald, Lizbeth Laureano-Perez
Abstract: Ultra-pure, carrier-free 209Po solution standards have been prepared and standardized for their massic alpha-particle emission rate. The standards, which will be disseminated by the National Institute of Standards and Technology (NIST) as Standard Re ...

23. Controlling the electronic structure of graphene using surface-adsorbate interactions
Topic: Physics
Published: 7/21/2015
Authors: Piotr Matyba, Adra V. Carr, Cong Chen, David L. Miller, Thomas Orlando, Stefan Mathias, Mark W Keller, Henry C. Kapteyn, Margaret M. Murnane
Abstract: Hybridization of atomic orbitals in graphene on Ni(111) opens up a large energy gap of ≈2.8 eV between nonhybridized states at the K point. Here we use alkali-metal adsorbate to reduce and even eliminate this energy gap, and also identify a new ...

Topic: Physics
Published: 6/19/2015
Authors: Bettye C Johnson, Steven W Brown, John Taylor Woodward IV, Keith R. Lykke, Giuseppe Zibordi
Abstract: The global Aerosol Robotic Network for Ocean Color (AERONET-OC) program utilizes AERONET CE-318 sun photometers (termed ,SeaPRISMsŠ) modified for in-air observations of ocean waters situated on oil drilling rigs, off-shore lighthouses, or other platf ...

25. Resolving the vacuum fluctuations of an optomechanical system using an artificial atom
Topic: Physics
Published: 6/15/2015
Authors: Florent Quentin Lecocq, John D Teufel, Jose Alberto Aumentado, Raymond Wiley Simmonds
Abstract: Heisenberg's uncertainty principle results in one of the strangest quantum behaviours: a mechanical oscillator can never truly be at rest. Even at a temperature of absolute zero, its position and momentum are still subject to quantum fluctuations ...

26. Dedicated NOAA/JPSS VIIRS Ocean Color Calibration/Validation Cruise
Topic: Physics
Published: 6/12/2015
Authors: Bettye C Johnson, Michael Ondrusek, Eric Stengel, Veronica P. Lance, Menghua Wang, Kenneth Voss, Giuseppe Zibordi, Marko Talone, Zhongping Lee, Jianwei Wei, Junfang Lin, Chuanmin Hu, David English, Charles Kovach, Jennifer Cannizzaro, Alex Gilerson, Sam Ahmed, Ahmed El-Habashi, Robert Foster, Robert Arnone, Ryan Vandermeulen, Sherwin Ladner, Wesley Goode, Joaquim I Goes, Helga de Rosario Gomes, Alex Chekalyuk, Kali McKee, Scott Freeman, Aimee Neeley, Amir Ibrahim
Abstract: The NOAA/STAR Ocean Color team is focused on ,end-to-endŠ production of ocean color satellite products. In situ validation of satellite data is essential to producing the high-quality products required and expected by the international ocean color re ...

27. Spin-scattering rates in metallic thin films measured by ferromagnetic resonance damping enhanced by spin-pumping
Topic: Physics
Published: 6/12/2015
Authors: Carl T. Boone, Justin M Shaw, Hans Toya Nembach, Thomas J Silva
Abstract: We determined the spin-transport properties of Pd and Pt thin films by measuring the increase in ferromagnetic resonance damping due to spin-pumping in ferromagnetic (FM)-nonferromagnetic metal (NM) multilayers with varying NM thicknesses. The in ...

28. On the 209Po Half-Life Error and Its Confirmation: A Critique
Topic: Physics
Published: 6/11/2015
Authors: Ronald Colle, Arthur M. Colle
Abstract: Collé, et al [(2007) Appl. Radiat Isot. 65, 728; (2014) J. Phys. G: Nucl. Part. Phys. 41, 105103], over the course of nearly a decade and with decay data from a period of 20.7 years, initially uncovered and then substantiated a 25 % error in the 209 ...

29. Suppression of Spin Pumping between Ni80Fe20 and Cu by a Graphene Interlayer
Topic: Physics
Published: 6/7/2015
Authors: William J. Gannett, Mark W Keller, Hans Toya Nembach, Thomas J Silva, Ann Chiaramonti Chiaramonti Debay
Abstract: Abstract We compare ferromagnetic resonance measurements of Py (Ni80Fe20) films sputtered onto Cu(111) with and without a graphene (Gr) interlayer grown by chemical vapor deposition before Py deposition. We find the expected damping enhancement f ...

30. Tunable Spin Qubit Coupling Mediated by a Multi-Electron Quantum Dot
Topic: Physics
Published: 6/4/2015
Authors: Vanita Srinivasa, Haitan Xu, Jacob M Taylor
Abstract: We present an approach for entangling electron spin qubits localized on spatially separated impurity atoms or quantum dots via a multi-electron, two-level quantum dot. The effective exchange interaction mediated by the dot can be understood as the si ...

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