Now showing items 1-15 of 15

    • Composition dependence of Schottky Barrier Heights and Bandgap Energies of GaNxAs1−x Synthesized by Ion Implantation and Pulsed-Laser Melting 

      Kim, Taeseok; Alberi, Kirstin; Dubon, Oscar D.; Aziz, Michael; Narayanamurti, Venkatesh (American Institute of Physics, 2008)
      We present a systematic investigation on the band structure of the GaN<sub>x</sub>As<sub>1−x</sub> alloys synthesized using nitrogen ion implantation followed by pulsed-laser melting and rapid thermal annealing. The evolution ...
    • Confinement-Enhanced Electron Transport across a Metal-Semiconductor Interface 

      Altfeder, I. B.; Golovchenko, Jene Andrew; Narayanamurti, Venkatesh (American Physical Society (APS), 2001)
      We present a combined scanning tunneling microscopy and ballistic electron emission microscopy study of electron transport across an epitaxial Pb/Si(111) interface. Experiments with a self-assembled Pb nanoscale wedge ...
    • Direct Injection Tunnel Spectroscopy of a p-n Junction 

      Likovich, Edward Michael; Russell, Kasey Joe; Narayanamurti, Venkatesh; Lu, Hong; Gossard, Arthur C. (American Institute of Physics, 2009)
      We demonstrate spectroscopic measurements on an InGaAs p-n junction using direct tunnel injection of electrons. In contrast to the metal-base transistor design of conventional ballistic electron emission spectroscopy (BEES), ...
    • DOE FY 2011 Budget Request for Energy Research, Development, Demonstration, and Deployment: Analysis and Recommendations 

      Anadon, Laura Diaz; Bunn, Matthew G.; Chan, Gabriel; Chan, Melissa; Gallagher, Kelly Sims; Jones, Charles; Kempener, Ruud; Lee, Audrey; Narayanamurti, Venkatesh (Belfer Center for Science and International Affairs, Harvard Kennedy School, 2010)
    • Epitaxial Catalyst-Free Growth of InN Nanorods on c-Plane Sapphire 

      Shalish, Ilan; Seryogin, G.; Yi, W.; Bao, J. M.; Zimmler, M. A.; Likovich, Edward Michael; Bell, David C.; Capasso, Federico; Narayanamurti, Venkatesh (Springer-Verlag, 2009)
      We report observation of catalyst-free hydride vapor phase epitaxy growth of InN nanorods. Characterization of the nanorods with transmission electron microscopy, and X-ray diffraction show that the nanorods are stoichiometric ...
    • Growth of ZnO Nanowires Catalyzed by Size-Dependent Melting of Au Nanoparticles 

      Petersen, Eric W.; Likovich, Edward Michael; Russell, Kasey Joe; Narayanamurti, Venkatesh (Institute of Physics, 2009)
      We present a general approach to growing ZnO nanowires on arbitrary, high melting point (above 970 °C) substrates using the vapor–liquid–solid (VLS) growth mechanism. Our approach utilizes the melting point reduction of ...
    • High-Current-Density Monolayer CdSe/ZnS Quantum Dot Light-Emitting Devices with Oxide Electrodes 

      Likovich, Edward; Jaramillo, Rafael; Russell, Kasey Joe; Ramanathan, Shriram; Narayanamurti, Venkatesh (Wiley-Blackwell, 2011)
    • Magnetoresistance in an Asymmetric GaMnAs Resonant Tunneling Diode 

      Likovich, Edward Michael; Russell, Kasey Joe; Yi, Wei; Narayanamurti, Venkatesh; Ku, Keh-Chiang; Zhu, Meng; Samarth, Nitin (American Physical Society, 2009)
      In a GaMnAs/AlGaAs resonant tunneling diode (RTD) structure, we observe that both the magnitude and polarity of magnetoresistance are bias dependent when tunneling from a three-dimensional GaMnAs layer through a two-dimensional ...
    • Narrow Band Defect Luminescence from AI-doped ZnO Probed by Scanning Tunneling Cathodoluminescence 

      Likovich, Edward M.; Jaramillo, Rafael; Russell, Kasey Joe; Ramanathan, Shriram; Narayanamurti, Venkatesh (American Institute of Physics, 2011)
      We present an investigation of optically active near-surface defects in sputtered Al-doped ZnO films using scanning tunneling microscope cathodoluminescence (STM-CL). STM-CL maps suggest that the optically active sites are ...
    • Patterned growth of single-walled carbon nanotube arrays from a vapor-deposited Fe catalyst 

      Peng, H. B.; Ristroph, T. G.; Schurmann, G. M.; King, G. M.; Yoon, J.; Narayanamurti, Venkatesh; Golovchenko, Jene Andrew (AIP Publishing, 2003)
      Single-walled carbon nanotubes have been grown on a variety of substrates by chemical vapor deposition using low-coverage vacuum-deposited iron as a catalyst. Ordered arrays of suspended nanotubes ranging from submicron ...
    • Scattering-Assisted Tunneling: Energy Dependence, Magnetic Field Dependence, and Use as an External Probe of Two-Dimensional Transport 

      Russell, Kasey Joe; Capasso, Federico; Narayanamurti, Venkatesh; Lu, H.; Zide, J. M. O.; Gossard, A. C. (American Physical Society, 2010)
      For more than three decades, research on tunneling through planar barriers has focused principally on processes that conserve momentum parallel to the barrier. Here we investigate transport in which scattering destroys ...
    • Scientific Wealth in Middle East and North Africa: Productivity, Indigeneity, and Specialty in 1981–2013 

      Siddiqi, Afreen; Stoppani, Jonathan; Anadon, Laura Diaz; Narayanamurti, Venkatesh (Public Library of Science, 2016)
      Several developing countries seek to build knowledge-based economies by attempting to expand scientific research capabilities. Characterizing the state and direction of progress in this arena is challenging but important. ...
    • Transforming U.S. Energy Innovation 

      Diaz Anadon, Laura; Bunn, Matthew G.; Chan, Melissa; Jones, Charles A.; Kempener, Ruud; Chan, Gabriel Angelo; Lee, Audrey; Logar, Nathaniel James; Narayanamurti, Venkatesh (Belfer Center for Science and International Affairs, Harvard Kennedy School, 2011)
      The United States and the world need a revolution in energy technology—a revolution that would improve the performance of our energy systems to face the challenges ahead. A dramatic increase in the pace of energy innovation ...
    • Transistors Formed from a Single Lithography Step Using Information Encoded in Topography 

      Dickey, Michael D.; Russell, Kasey Joe; Lipomi, Darren J.; Narayanamurti, Venkatesh; Whitesides, George McClelland (Wiley-Blackwell, 2010)
      This paper describes a strategy for the fabrication of functional electronic components (transistors, capacitors, resistors, conductors, and logic gates but not, at present, inductors) that combines a single layer of ...
    • Weak Localization and Mobility in ZnO Nanostructures 

      Likovich, Edward Michael; Russell, Kasey Joe; Petersen, Eric W.; Narayanamurti, Venkatesh (American Physical Society, 2009)
      We conduct a comprehensive investigation into the electronic and magnetotransport properties of ZnO nanoplates grown concurrently with ZnO nanowires by the vapor-liquid-solid method. We present magnetoresistance data showing ...