Eric A. Hoffmann
Email: ehoffma1@uoregon.edu
Phone: (541) 346-4771
Fax: (541) 346-3422
Physics Department and Materials Science Institute
1274 University of Oregon
Eugene, Oregon 97403-1274, USA

Born April 28, 1982
Citizenship: United States of America
Education

University of Oregon, 9/2004 - present
Ph.D. in Physics (expected summer 2009) Advisor: Heiner Linke
Area of specialization: Thermoelectric phenomena of InAs/InP heterostructure nanowires
GPA: 3.95 (out of 4.0)
University of Puget Sound, 8/2000 - 5/2004
B.S. in Physics with honors and B.S. in Mathematics with honors
GPA: 3.75 (out of 4.0)
Research Experience

Graduate Research Assistant, University of Oregon, 6/2005 – present
Research emphasis: Characterization of the thermoelectric properties of InAs/InP nanowires
Research topics
  • Low-temperature electron and thermal transport in mesoscopic devices
  • Nanoscale heating and cooling, thermometry, and detection of thermal phenomena
  • Installation, maintenance, and operation of 3He and 4He cryostats
Visiting Researcher at the Nanometer Structure Consortium, Lund University,
Lars Samuelson group, 12/2005 - 03/2006 and 09/2007 - 12/2007
Research emphasis: Design and fabrication of mesoscopic devices for thermal experiments
Research topics
  • Nanofabrication of homogenous InAs and heterostructure InAs/InP nanowire devices
  • Characterization of mesoscopic thermal effects in heterostructure nanowire devices
Summer Research Internship (NNUN), University of California, Santa Barbara,
S. James Allen group, 6/2003 - 8/2003
Research emphasis: Biological life detection using terahertz circular dichroism spectroscopy
Summer Research Internship (REU), University of Colorado, Boulder,
Noel Clark group, 6/2002 - 8/2002
Research emphasis: Self-assembling monolayers for liquid crystal alignment
Awards and Honors

National Science Foundation Integrative Graduate Education and Research Traineeship, University of Oregon
Three consecutive years of application and acceptance, 9/2005 - 9/2008
Awards for Academic Achievement, University of Puget Sound
  • Slater Award, science research award from the Office of the Academic Dean, 2004
  • Peter K. Wallerich Scholarship, physics academic award, 2003
  • Edward Goman Mathematics Scholarship, mathematics academic award, 2003
  • NASA Space Grant Scholarship, natural sciences academic award, 2002
Teaching Experience

Semiconductor Device Course Teaching Assistant, University of Oregon, 7/2007 and 7/2008
Taught laboratory sections for masters graduate students as part of a summer school program
Astronomy Teaching Assistant, University of Oregon, 9/2004 - 6/2005
Assisted with an undergraduate introductory astronomy course
Physics Tutor and Mathematics Tutor, University of Puget Sound, 9/2002 - 5/2004
Tutored undergraduates in physics and mathematics in two separate positions
Science Consultant for the Museum of Glass, Tacoma, Washington, 1/2002 - 3/2003,
Developed a high-school level physics curriculum related to contemporary art and pe rformed scientific demonstrations at the museum to reinforce the curriculum
Professional Experience

University of Oregon Physics Graduate Student Seminar Organizer, 9/2006 - 6/2007 and 9/2008 - present
Recruited and scheduled seminar speakers throughout the year including professors and graduate students from physics, chemistry, and neuroscience
University of Oregon Materials Science Institute Retreat Organizer, 9/2007 - 12/2007
Invited external academic and industrial speakers to a student-organized multidisciplinary conference focusing on collaborative materials science research
University of Oregon Accreditation Renewal Board Participant, 4/2007
Discussed the university’s accreditation renewal with an external accreditation team
Public Forum on Nanotechnology Facilitator, 3/2007
Lead discussions with member of the public regarding nanotechnology at a forum co-hosted by the Oregon Museum of Science and Industry and the University of Oregon
Publications and Professional Communications

Journal Publications:
  1. Measuring temperature gradients over nanometer length scales
    E.A. Hoffmann, H.A. Nilsson, J.E. Matthews, N. Nakpathomkun, A.I. Persson, L. Samuelson, and H. Linke, Nano Letters 9, 779 (2009).
  2. Quantum-dot thermometry
    E.A. Hoffmann, N. Nakpathomkun, A.I. Persson, H.A. Nilsson, L. Samuelson, H. Linke
    Appl. Phys. Lett. 91, 252114 (2007).

Conference Proceedings:
  1. Nanoscale thermometry with a quantum dot
    E.A. Hoffmann and H. Linke
    Journal of Low-Temperature Physics, 154, 161 (2009)
    Conference on Micro- and Nanocryogenics (MNC), a satellite of the 25th International Conference on Low Temperature Physics (LT25), Helsinki, Finland.
  2. Determining a temperature differential across a quantum dot
    E.A. Hoffmann, N. Nakpathomkun, A.I. Persson, H.A. Nilsson, L. Samuelson, H. Linke
    Physica E: Low-Dimensional Systems & Nanostructures 40, 1605-1607 (2008)
    Proceeding of the 17th International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS), Genoa, Italy.
  3. Power generation with nanowire resonant tunneling thermoelectrics
    M. F. O'Dwyer, H. Linke, E. Hoffmann, T. E. Humphrey, R. A. Lewis and C. Zhang
    IEEE Publication (Conference Book) Title: '06 Int'l Thermoelectric Conference (ICT'06).
    Proceeding of the International Thermoelectric Conference (ICT'06), Vienna, Austria.

Professional Talks:
  1. High-efficiency thermoelectric quantum dots
    E.A. Hoffmann, N. Nakpathomkun, H.A. Nilsson, A.I. Persson, L. Samuelson, H. Linke.
    Conference on Micro- and Nanocryogenics (MNC), a satellite of the 25th International Conference on Low Temperature Physics (LT25), Helsinki, Finland, August 3, 2008.
  2. Non-linear thermocurrent in quantum dots
    E.A. Hoffmann, N. Nakpathomkun, A.I. Persson, H.A. Nilsson, L. Samuelson, H. Linke.
    The International Conference on the Physics of Semiconductors (ICPS 2008), Rio de Janeiro, Brazil, July 29, 2008.
  3. Thermovoltage in Heterostructure InAs/InP Nanowires
    E.A. Hoffmann, A.I. Persson, H. Linke, H.A. Nilsson, L. Fröberg, L. Samuelson
    American Physics Society March Meeting: March 7, 2007.
  4. Thermoelectric Properties of Heterostructure InAs/InP Nanowires
    Eric Hoffmann
    MSI Retreat: December 14, 2006.
  5. The Growth of Nanowires and their Thermoelectric Applications
    Eric Hoffmann
    University of Oregon IGERT Student Seminar: November 17, 2006.
  6. The Quantum Mechanics of Carnot Efficiency
    Eric Hoffmann
    University of Oregon Physics Graduate Student Seminar: November 15, 2006.
  7. Thermoelectric Properties of Heterostructure Nanowires
    Eric Hoffmann
    Presented at the University of Oregon IGERT Student Seminar: December 2, 2005.
  8. Nanowires as high-efficiency Thermoelectrics
    Eric Hoffmann
    University of Oregon Physics Graduate Student Seminar: November 16, 2005.
  9. Thermoelectric Properties of Heterostructure Nanowires
    Eric Hoffmann
    Presented at the Lund University Quantum Transport Seminar: February 10, 2005.

Posters Presentations:
  1. Quantum-dot thermoelectrics
    E.A. Hoffmann, N. Nakpathomkun, A.I. Persson, H.A. Nilsson, L.E. Fröberg, L. Samuelson, H. Linke
    Presented at the 2nd International Conference on One-Dimensional Nanostructures (ICON), Malmö, Sweden: September 26-29, 2007.
  2. Thermometry and Thermovoltage of 1D-0D-1D Structures in InAs/InP Nanowires
    E.A. Hoffmann, A.I. Persson, N. Nakpathomkun, H. Nilsson, L. Fröberg, L. Samuelson, H. Linke Presented at the 17th conference on Electronic Properties of Two-Dimensional Systems (EP2DS 17), Genoa, Italy: July 17, 2007.
  3. Thermoelectric characterization of a single quantum dot embedded in a nanowire
    A.I. Persson, E.A. Hoffmann, L. Fröberg, M. O'Dwyer, H.A. Nilsson, L. Samuelson, and H. Linke
    Presented at the Direct Thermal-to-Electrical Energy Conversion (DTEC) Program Review and Workshop, August 2006, San Diego, CA 92118.
  4. Quantum Thermoelectrics at Carnot Efficiency
    Eric Hoffmann
    Poster at the Northwest Meeting of the APS: May 2006.
  5. Thermoelectric Properties of Heterostructure Nanowires
    Eric Hoffmann
    Presented at the University of Oregon Materials Science Institute Retreat: September 13, 2005.