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Topic Area: Electron Physics
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Displaying records 11 to 20 of 96 records.
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11. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908884

12. Mechanism for puddle formation in graphene
Topic: Electron Physics
Published: 12/5/2011
Authors: Shaffique Adam, Suyong S. Jung, Nikolai Nikolayevich Klimov, Nikolai B Zhitenev, Joseph A Stroscio, Mark D Stiles
Abstract: Close to charge neutrality, graphene's energy landscape is highly inhomogeneous, forming a sea of electron-like and hole-like puddles that determine the properties of graphene at low carrier density. However, the details of puddle formation have re ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908816

13. 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

14. 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

15. 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

16. 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

17. 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

18. 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

19. 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

20. 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



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