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Topic Area: Electron Physics

Displaying records 11 to 20 of 93 records.
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11. Organic photovoltaic bulk heterojunctions with spatially varying composition.
Topic: Electron Physics
Published: 7/21/2011
Author: Paul M Haney
Abstract: We consider models of organic bulk heterojunction photovoltaics with spatially varying compo- sition of donor/acceptor materials. We find analytic expressions for the current-voltage relation in simplifed cases for two blend geometries, and find th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908321

12. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907725

13. Electronic transport in two dimensional graphene
Topic: Electron Physics
Published: 5/16/2011
Authors: Shaffique Adam, Sankar Das Sarma, Euyheon Hwang, Enrico Rossi
Abstract: We provide a broad review of fundamental electronic properties of two-dimensional graphene with the emphasis on density and temperature dependent carrier transport in doped or gated graphene structures. A salient feature of our review is a critical ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905178

14. Semiclassical Boltzmann transport theory for graphene multilayers
Topic: Electron Physics
Published: 5/11/2011
Authors: Hongki Min, Parakh Jain, Shaffique Adam, Mark D Stiles
Abstract: We calculate the conductivity of arbitrarily stacked multilayer graphene sheets within a relaxation time approximation by considering both short-range and long-range impurities. We investigate theoretically the feasibility of identifying the stackin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907433

15. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907652

16. Perspective on Probing Metallic Ferromagnetism with Electrons
Topic: Electron 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906729

17. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906468

18. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906778

19. Electron Vortex Beams with High Quanta of Orbital Angular Momentum
Topic: Electron Physics
Published: 1/14/2011
Authors: Benjamin James McMorran, Amit Kumar Agrawal, Ian M. Anderson, Andrew A Herzing, Henri J Lezec, Jabez J McClelland, John Unguris
Abstract: Analogous to vortices in light optical beams, electron optical beams with helical wavefronts carry orbital angular momentum and promise new capabilities for electron microscopy and other applications. We use nanofabricated diffraction holograms in an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906991

20. Current induced torques in the presence of spin-orbit coupling
Topic: Electron Physics
Published: 9/17/2010
Authors: Paul M Haney, Mark D Stiles
Abstract: In systems with strong spin-orbit coupling, the relationship between spin-transfer torque and the divergence of the spin current is generalized to a relation between spin transfer torques, total angular momentum current, and mechanical torques. I ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906100



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