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You searched on: Topic Area: Condensed Matter Physics

Displaying records 21 to 30 of 48 records.
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21. Switching Distributions for Perpendicular Spin-Torque Devices Within the Macrospin Approximation
Topic: Condensed Matter Physics
Published: 7/17/2012
Authors: William H. Butler, William H Rippard, Stephen E Russek, Ranko R. Heindl
Abstract: We model "soft" error rates for writing (WSER) and for reading (RSER) for spin-torque memory devices that have a free layer with easy axis perpendicular to the film plane by solving the Fokker-Planck equation for the probability distribution of the a ...

22. Propagation and control of nano-scale, magnetic droplet solitons
Topic: Condensed Matter Physics
Published: 6/11/2012
Authors: Thomas J Silva, Mark Hoefer, Matteo Sommacal
Abstract: The propagation and controlled manipulation of strongly nonlinear, two-dimensional solitonic states in a thin, anisotropic ferromagnet is theoretically demonstrated. It has been recently proposed that spin polarized currents in a nanocontact device c ...

23. Identifying capacitive and inductive loss in lumped element superconducting hybrid titanium nitride/aluminum resonators
Topic: Condensed Matter Physics
Published: 6/9/2012
Authors: Martin P. Weides, Jeffrey S. Kline, Martin O. Sandberg, David P Pappas
Abstract: We present a method to systematically locate and extract capacitive and inductive losses in superconductingresonators at microwave frequencies by use of mixed-material, lumped element devices. In these devices, ultra-low loss titanium nitride was ...

24. Measurement and modeling of a large-area normal-metal/insulator/superconductor refrigerator with improved cooling
Topic: Condensed Matter Physics
Published: 4/5/2012
Authors: Galen C O\'Neil, Peter J Lowell, Joel Nathan Ullom, Jason M Underwood
Abstract: In a refrigerator, heat is moved from one system to another and this movement requires an additional dissipated power. It is desirable to both isolate the cooled system, so that its temperature may differ from the bath, and to heatsink the heated sys ...

25. Electronic properties of multilayer graphene
Topic: Condensed Matter Physics
Published: 3/31/2012
Author: Hongki Min
Abstract: In this chapter, we study the electronic structure of arbitrarily stacked multilayer graphene in the absence or presence of magnetic field. Energy band structure and Landau level spectrum are obtained using a pi-orbital continuum model with nearest-n ...

26. Ultrafast Demagnetization Measurements using Extreme Ultraviolet Light: Comparison of Electronic and Magnetic Contributions
Topic: Condensed Matter Physics
Published: 1/23/2012
Authors: Thomas J Silva, Justin M Shaw, Hans Toya Nembach, Margaret M. Murnane, Henry C. Kapteyn, Chan La-O-Vorakiat, Stefan Mathias, Emrah Turgut, Teale A. Carson, Martin Aeschlimann, Claus M. Schneider
Abstract: Ultrashort pulses of extreme ultraviolet light from high-harmonic generation are a new tool for probing coupled charge, spin, and phonon dynamics with element specificity, attosecond pump-probe synchronization, and time resolution of a few-femtosecon ...

27. Beyond s-wave scattering for ultracold atoms
Topic: Condensed Matter Physics
Published: 1/20/2012
Authors: Ross A. Williams, Lindsay J. LeBlanc, Karina K. Jimenez Garcia, Matthew C. Beeler, Abigail Reiko Perry, William D Phillips, Ian B Spielman
Abstract: Interactions between particles can be strongly altered by their environment. Here we demonstrate a technique for modifying interactions between ultracold atoms by dressing the bare atomic states with light, creating a screened interaction of vastly i ...

28. Andreev Reflections in Micrometer-Scale Normal Metal-Insulator-Superconductor Tunnel Junctions
Topic: Condensed Matter Physics
Published: 11/24/2011
Authors: Peter J Lowell, Galen C O\'Neil, Jason M Underwood, Joel Nathan Ullom
Abstract: Understanding the subgap behavior of Normal-Insulator-Superconductor (NIS) tunnel junctions is important in order to be able to accurately model the thermal properties of the junctions. Hekking and Nazarov developed a theory in which the NIS sub gap ...

Topic: Condensed Matter Physics
Published: 6/1/2011
Authors: Joshua M Pomeroy, Russell Lake, C E Sosolik
Abstract: The electrical conductance of magnetic tunnel junction (MTJ) devices whose ultra-thin aluminum oxide tunnel barrier was irradiated by highly charged ions (HCIs) increases linearly with the fluence of HCIs, while retaining a current-voltage relationsh ...

30. Perspective on Probing Metallic Ferromagnetism with Electrons
Topic: Condensed Matter Physics
Published: 3/21/2011
Author: Daniel Thornton Pierce
Abstract: This article presents a brief review of some of the many insights gained about metallic ferromagnetism using spin-polarized electrons as probes. Aspects of metallic ferromagnetism discussed include spin-dependent electronic structure, spin-dependent ...

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