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You searched on: Topic Area: Electron Physics

Displaying records 1 to 10 of 16 records.
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1. Weak Localization, Spin Relaxation, and Spin-Diffusion: Crossover Between Weak and Strong Rashba Coupling Limits
Topic: Electron Physics
Published: 9/17/2014
Authors: Yasufumi Araki, Guru Bahadur S Khalsa, Allan H. MacDonald
Abstract: Disorder scattering and spin-orbit coupling are together responsible for the diffusion and relaxation of spin-density in time-reversal invariant systems. We study spin-relaxation and diffusion in a two-dimensional electron gas with Rashba spin-orbit ...

2. Absolute pulse energy measurements of soft x-rays at the Linac Coherent Light Source
Topic: Electron Physics
Published: 8/25/2014
Authors: Uwe Arp, Alexander Sorokin, Ulf Jastrow, Pavle Jurani?, Svea Kreis, Mathias Richter, Yiping Feng, Dennis Nordlund, Kai Tiedtke, Philip Heimann, Bob Nagler, Hae Ja Lee, Stephanie Mack, Marco Cammarata, Oleg Krupin, Marc Messerschmidt, Michael Holmes , Michael Rowen, William Schlotter, Stefan Moeller, Joshua Turner
Abstract: This paper reports novel measurements of x-ray optical radiation on an absolute scale from a recently developed source of radiation generated in the soft x-ray regime of a free electron laser. We give a brief description of the physics behind the ...

3. Dirac fermion heating, current scaling, and direct insulator-quantum Hall transition in multi-layer epitaxial graphene
Topic: Electron Physics
Published: 8/1/2013
Authors: Randolph E Elmquist, Fan-Hung Liu, Chang-Shun Hsu, Chiashain Chuang, Tak-Pong Woo, Lung-I Huang Huang, Chi-Te Laing, Yasuhiro Fukuyama, Yanfei Yang
Abstract: We have performed magnetotransport measurements on multi-layer epitaxial graphene. By increasing the driving current I through our graphene devices while keeping the bath temperature fixed, we are able to study Dirac fermion heating and current scali ...

4. Electronic properties of multilayer graphene
Topic: Electron 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 ...

5. Formation and structure of 360 and 540 degree domain walls in thin magnetic stripes
Topic: Electron Physics
Published: 2/10/2012
Authors: Youngman Jang, Samuel R. Bowden, Mark Mascaro, John Unguris, Caroline Ross
Abstract: 360˚, 540˚ and other complex transverse domain walls have been created in narrow Co wires connected to injection pads by cycling a magnetic field perpendicular to the wire length. The composite walls, formed by impingement of 180˚ tran ...

6. Graphene: Plane and Simple Electrical Metrology?
Topic: Electron Physics
Published: 12/7/2011
Authors: Randolph E Elmquist, Felipe Hernandez-Marquez, Mariano Real, Tian T. Shen, David B Newell, Colin James Jacob, George R Jones
Abstract: The development of large-area graphene has direct application to electrical standards including the quantized Hall resistance because of unique characteristics not found in conventional devices. These include symmetrical conduction by electrons and h ...

7. Graphene Production for Electrical Metrology
Topic: Electron Physics
Published: 6/1/2011
Authors: Randolph E Elmquist, David B Newell, George R Jones, Felipe Leon Marquez-Hernandez, Mariano A. Real, Tian T. Shen
Abstract: Many material and electronic contributions must be favorable to produce devices with strong quantum Hall effect (QHE) plateaus that are suitable for precise resistance metrology. Even so, metrologically interesting QHE plateaus have been observed in ...

8. Landau Levels and Band Bending in Few-Layer Epitaxial Graphene
Topic: Electron Physics
Published: 4/18/2011
Authors: Hongki Min, Shaffique Adam, Young J. Song, Joseph A Stroscio, Mark D Stiles, Allan H. MacDonald
Abstract: The carrier density distributions in few-layer-graphene systems grown on the carbon face of silicon carbide can be radically altered by the presence of a Scanning Tunneling Microscope (STM) tip used to probe top-layer electronic properties, and by ...

9. Effect of interactions on edge property measurements in magnetic multilayers
Topic: Electron Physics
Published: 2/25/2011
Authors: Meng Zhu, Robert D McMichael
Abstract: This paper reports effects of inter-film interactions on static and dynamic magnetization behavior at film edges in magnetic trilayer stripe arrays under transverse applied fields. The trilayers consist of two magnetic films of Ni80Fe20, 10 nm and 2 ...

10. Enhanced magnetization drift velocity and current polarization in (CoFe)_{1-x}Ge_{x} alloys
Topic: Electron Physics
Published: 2/17/2011
Authors: Meng Zhu, Brian D Soe, Robert D McMichael, Matthew Carey, Stefan Maat, Jeffrey R Childress
Abstract: A spin wave Doppler technique is used to measure the drift velocity of the magnetization in current-carrying (CoFe)_{1-x}Ge_{x} alloys. For a current density of 10^11 A/m2, we obtain a large enhancement of drift velocity from 3.1+/-0.2 m/s for CoFe ...

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