Publications and Presentations

Publications

  • “Venture Capital and Cleantech: The wrong model for energy innovation.” Energy Policy (2017)
  • “Venture Capital and Cleantech: The Wrong Model for Clean Energy Innovation.” MIT Energy Initiative Working Paper (2016)
  • “Dysprosium-doped cadmium oxide as a gateway material for mid-infrared plasmonics.” Nature Materials (2015)
  • “Fermi level control of compensating point defects during metalorganic chemical vapor deposition growth of Si-doped AlGaN.” Applied Physics Letters (2014)
  • “Overcoming the polarization catastrophe in the rocksalt oxides MgO and CaO.” Physical Review B (2014)
  • “The role of the carbon-silicon complex in eliminating deep ultraviolet absorption in AlN.” Applied Physics Letters (2014)
  • “Smooth cubic commensurate oxides on gallium nitride.” Journal of Applied Physics (2014)
  • “Vacancy compensation and related donor-acceptor pair recombination in bulk AlN.” Applied Physics Letters (2013)
  • “Effects of alloying and local order in AuNi contacts for Ohmic radio frequency micro electro mechanical systems switches via multi-scale simulation.” Journal of Applied Physics (2013)
  • “On the origin of the 265 nm absorption band in AlN bulk crystals.” Applied Physics Letters (2012)
  • “Surfactant-enabled epitaxy through control of growth mode with chemical boundary conditions.” Nature Communications (2011)

Media and Speaking Appearances

Technical Presentations

  • “Point defect control in power III-Nitride semiconductors.” Benjamin Gaddy, Isaac Bryan, Zachary Bryan, Ronny Kirste, Marc Hoffmann, Baxter Moody, Rafael Dalmau, Ramon Collazo, Zlatko Sitar, Douglas Irving. TMS 2014 (February 2014) San Diego, CA, USA
  • “Routes to low defect interfaces between rocksalt oxides and wurtzite nitrides.” (Invited) Elizabeth Paisley, Benjamin Gaddy, James LeBeau, Christopher
    Shelton, Ramón Collazo, Zlatko Sitar, Douglas Irving, Jon-Paul Maria. TMS 2014 (February 2014) San Diego, CA, USA
  • “Donor-Acceptor Pair Compensation and the Broad 2.8 eV Luminescence in Bulk AIN.” Benjamin E. Gaddy, Zachary A. Bryan , Isaac S. Bryan, Ronny Kirste, Jinqiao Xie, Rafael Dalmau, Baxter Moody, Yoshinao Kumagai, Toru Nagashima, Yuki Kubota, Toru Kinoshita, Akinori Koukitu, Zlatko Sitar, Ramon Collazo, and Douglas L. Irving. 10th International Conference on Nitride Semiconductors (ICNS) (August 2013) Washington, D.C., USA
  • “Vacancy Compensation in N-Type AlN Bulk Crystals Using a DFT- Based Self-Consistent Mass-Balance Approach and Photoluminescence (PL) Spectroscopy.” Benjamin E. Gaddy, Zachary A. Bryan, Jinqiao Xie, Ronny Kirste, Rafael Dalmau, Baxter Moody, Yoshinao Kumagai, Akinori Koukitu, Toru Nagashima, Yuki Kubota, Toru Kinoshita, Ramón Collazo, Douglas L. Irving and Zlatko Sitar. Electronic Materials Conference (June 2013) Notre Dame University, South Bend, Indiana, USA
  • “Surfactant-Enabled Growth of Polar Oxide-Nitride Interfaces, Using DFT to Explore the Early Stages of Epitaxial Growth.” (Poster) Benjamin E. Gaddy, Elizabeth Paisley, Christopher T. Shelton, M. D. Biegalski, H. M. Christen, Seiji Mita, Mark D. Losego, Zlatko Sitar, James M. LeBeau, Jon-Paul Maria and Douglas L. Irving. Electronic Materials Conference (June 2013) Notre Dame University, South Bend, Indiana, USA
  • “Electrical Contact Degradation: A Multiscale Simulation Study.” (Invited) Douglas Irving, Christopher Freeze, Benjamin Gaddy, and Xiaoyin Ji. TMS 2013. (March 2013) San Antonio, Texas, USA
  • “Understanding Compensation Mechanisms at Oxide Surfaces and at Structurally Dissimilar Oxide-nitride Interfaces.” Benjamin E Gaddy, Elizabeth  A  Paisley, Hamideh M Alipour, Christopher T Shelton, James S Tweedie, Mark D Losego, James M LeBeau, Ramón Collazo, Zlatko Sitar, Douglas L Irving, Jon-Paul Maria. Materials Research Society Fall Meeting (November 2012) Boston, Massachusetts, USA
  • “Eliminating Unwanted Optical Absorption in AlN Substrates through Defect Control.”(Poster) Ramon  Collazo, Jinqiao  Xie, Benjamin  E  Gaddy, Zachary  A  Bryan, Ronny  Kirste, Marc  Hoffmann, Rafael  Dalmau, Baxter  Moody, Yoshinao  Kumagai, Toru  Nagashima, Yuki  Kubota, Toru  Kinoshita, Akinori  Koukitu, Douglas  L  Irving, Zlatko  Sitar. Materials Research Society Fall Meeting (November 2012) Boston, Massachusetts, USA
  • “AlN-based Technology for Deep UV and High-power Applications.” (Invited) Z. Sitar, B. Moody, S. Craft, R. Schlesser, R. Dalmau, J. Xie, S. Mita, T. Rice, J. Tweedy, J. LeBeau, L. Hussey, R. Collazo, B.E. Gaddy, and D.L. Irving. American Vacuum Society 59th International Symposium. (October 2012) Tampa, Florida, USA
  • “Predictive Calculations of Defect Properties using Hybrid Exchange DFT: Applications to Optically Active Impurities in AlN.” (Poster) Benjamin E. Gaddy, Ramon Collazo, Jinqiao Xie, Zachary Bryan, Ronny Kirste, Marc Hoffman, Rafael Dalmau, Baxter Moody, Yoshinao Kumagai, Toru Nagashima, Yuki Kubota, Toru Kinoshita, Akinori Koukitu, Zlatko Sitar, and Douglas L. Irving. International Workshop on Nitride Semiconductors (October 2012) Sapporo, Japan
  • “On the origin of the 265 nm absorption band in AlN bulk crystals.” (Poster) Ramon Collazo, Jinqiao Xie, Benjamin E. Gaddy, Zachary Bryan, Ronny Kirste, Marc Hoffman, Rafael Dalmau, Baxter Moody, Yoshinao Kumagai, Toru Nagashima, Yuki Kubota, Toru Kinoshita, Akinori Koukitu, Douglas L. Irving, and Zlatko Sitar. International Workshop on Nitride Semiconductors (October 2012) Sapporo, Japan
  • “AlN-based technology for deep UV and high-power applications.” (Invited) Z. Sitar, B. Moody, S. Craft, R. Schlesser, R. Dalmau, J. Xie, S. Mita, T. Rice, J. Tweedy, J. LeBeau, L.  Hussey, R. Collazo, B.E. Gaddy, and D.L. Irving. International Workshop on Nitride Semiconductors (October 2012) Sapporo, Japan
  • “On the Origin of the 265 nm Absorption Band in AlN Bulk Crystals.” Ramón Collazo, Jinqiao Xie, Benjamin E. Gaddy, Douglas L. Irving, Rafael Dalmau, Baxter Moody, Yoshinao Kumagai, Toru Nagashima, Yuki Kubota, Toru Kinoshita, Akinori Koukito and Zlatko Sitar. Electronic Materials Conference (June 2012) Pennsylvania State University, University Park, Pennsylvania, USA
  • “Surfactant Assisted Growth of Smooth Epitaxial Oxides on GaN.” Elizabeth
    Paisley, Christopher Shelton, Michael Biegalski, James Lebeau, Benjamin
    Gaddy, Seiji Mita, Ramon Collazo, Zlatko Sitar, Douglas Irving and Jon-Paul
    Maria. Electronic Materials Conference (June 2012) Pennsylvania State University, University Park, Pennsylvania, USA
  • “Surfactant Stabilization of Polar Oxide Surfaces: Enabling the Creation of Novel Functional Interfaces.” Benjamin E. Gaddy, Elizabeth A. Paisley, Mark D. Losego, James S. Tweedie, Ramón Collazo, Zlatko Sitar, Jon-Paul Maria and Douglas L. Irving. Materials Research Society Fall Meeting (November 2011) Boston, Massachusetts, USA
  • “Simulated Nano-Indentation Testing of Au-Ni Contacts for RF-MEMS Switches.” Benjamin E. Gaddy, Yinxuan Yang, Angus I. Kingon and Douglas L. Irving. Materials Research Society Fall Meeting (November 2011) Boston, Massachusetts, USA
  • “Study of Electronic Nano-Size Contact Mechanism in Au-Based MEMS Contact Switches.” Yinxuan Yang, Scott W. Hoffmann, Benjamin E. Gaddy, Xiaoyin Ji, Christopher R. Freeze, Douglas L. Irving and Angus I. Kingon. Materials Research Society Fall Meeting (November 2011) Boston, Massachusetts, USA
  • “Surfactant-Assisted Growth of Smooth Epitaxial Oxides on GaN.” Elizabeth A. Paisley, Michael D. Biegalski, James M. LeBeau, Benjamin E. Gaddy, Seiji Mita, Ramon Collazo, Zlatko Sitar, Douglas L. Irving and Jon-Paul Maria. Materials Research Society Fall Meeting (November 2011) Boston, Massachusetts, USA
  • “Surfactant Stabilization of Rocksalt Oxides (CaO) on GaN.” (Poster) Benjamin E. Gaddy, Elizabeth A. Paisley, Douglas L. Irving and Jon-Paul Maria. NC State University Graduate Student Research Symposium (March 2011) Raleigh, North Carolina, USA
  • “2-D Growth of Smooth Cubic Epitaxial Oxides on GaN.” (Poster) Elizabeth A. Paisley, Mark D. Losego, Benjamin Gaddy, Anthony Rice, Ramon Collazo, James Tweedie, Douglas Irving, Zlatko Sitar, and Jon-Paul Maria. NC State University Graduate Student Research Symposium (March 2011) Raleigh, North Carolina, USA
  • “Multi-scale Simulation of Au-Ni Contacts in RF-MEMS Switches.” (Poster) Benjamin E. Gaddy and Douglas L. Irving. Materials Research Society Fall Meeting (November 2010) Boston, Massachusetts, USA
  • “Atomistic Simulation of the ‘in use’ Conditions of an Ohmic RF-MEMs Contact.” Benjamin E. Gaddy, Xiaoyin Ji, Christopher R. Freeze and Douglas L. Irving. Materials Research Society Fall Meeting (November 2010) Boston, Massachusetts, USA