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Topic Area: Electron Physics

Displaying records 11 to 20 of 100 records.
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11. 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 ...

12. 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 ...

13. 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 ...

14. 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 ...

15. 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 ...

16. 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 ...

17. 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 ...

18. 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 ...

19. 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 ...

20. 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 ...

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