Ryan Comes

EDUCATION

University of Virginia, Charlottesville, VA, Ph.D. Engineering Physics, May 2013.

Carnegie Mellon University, Pittsburgh, PA, B.S. Electrical and Computer Engineering, B.S. Physics, May 2008, Honors: University Honors, Carnegie Institute of Technology College Honors, Mellon College of Science Honors

WORK EXPERIENCE

Auburn University, Department of Physics, Assistant Professor, August 2016-Present

Pacific Northwest National Lab, Materials Science, Fundamental and Computational Science Division, Linus Pauling Postdoctoral Fellow, July 2013-July 2016

Naval Research Lab, Space Applications Branch, Student Temporary Employment Program, 2004-2008

Naval Research Lab, Space Applications Branch, Science and Engineering Apprentice Program, 2003

RESEARCH EXPERIENCE

Pacific Northwest National Laboratory, Linus Pauling Distinguished Postdoctoral Fellow, Mentor: Dr. Scott Chambers, July 2013-July 2016

University of Virginia, Engineering Physics, Graduate Research Assistant, Advisor: Prof. Stuart Wolf, September 2008-May 2013

Carnegie Mellon University, Carnegie Institute of Technology Honors Research Project, Advisor: Prof. C. Fred Higgs, August 2007-May 2008

TEACHING EXPERIENCE

Auburn University, Department of Physics, 2016-Present

University of Virginia, School of Engineering and Applied Science, Graduate Teaching Fellow, 2012

Carnegie Mellon University, Department of ECE, Undergraduate Grader/Teaching Assistant, 2007-2008

Carnegie Mellon University, Academic Development, Peer Tutor, 2005-2008

JOURNAL PUBLICATIONS

  1. Tiffany C. Kaspar, Seungbum Hong, Mark E. Bowden, Tamas Varga, Pengfei Yan, Chongmin Wang, Steven R. Spurgeon, Ryan B. Comes, Pradeep Ramuhalli & Charles H. Henager Jr. “Tuning piezoelectric properties through epitaxy of La2Ti2O7 and related thin films,” Scientific Reports8, 3037, Feb 2018. DOI: 10.1038/s41598-018-21009-5
  2. Steven R. Spurgeon, Peter V. Sushko, Scott A. Chambers, and  Ryan B. Comes. “Dynamic Interface Rearrangement in LaFeO3 / n-SrTiO3 Heterojunctions,” Physical Review Materials1, 063401, Nov 2017. DOI: 10.1103/PhysRevMaterials.1.063401
  3. Ryan B. Comes, Daniel E. Perea, and Steven R. Spurgeon. “Heterogeneous Two-phase Pillars in Epitaxial NiFe2O4-LaFeO3 Nanocomposites,” Advanced Materials Interfaces4, 1700396, Aug 2017. DOI: 10.1002/admi.201700396
  4. Kelsey A. Stoerzinger, Ryan B. Comes, Steven R. Spurgeon, Suntharapillai Thevuthasan, Kyuwook Ihm, Ethan J. Crumlin, Scott A. Chambers. “Influence of surface termination on water reactivity in LaFeO3,” Journal of Physical Chemistry Letters, 8, 1038-1043, Mar 2017. DOI: 10.1021/acs.jpclett.7b00195
  5. Scott A. Chambers, Yingge Du, Ryan B. Comes, Steven R. Spurgeon, and Peter V. Sushko. “The Effects of Core-level Broadening in Determining Band Alignment at the Epitaxial SrTiO3(001)/p-Ge(001) heterojunction,” Applied Physics Letters, 110, 082104, Feb 2017. DOI: 10.1063/1.4977422
  6. Ryan B. Comes, Steven R. Spurgeon, Mark H. Engelhard,
    Despoina M. Kepaptsoglou, Tiffany C. Kaspar, Quentin M. Ramasse, Peter V. Sushko, and Scott A. Chambers. “Probing the Origin of Interfacial Carriers in SrTiO3-LaCrO3Superlattices,” Chemistry of Materials, 29, 1147–1155, Feb 2017. DOI: 10.1021/acs.chemmater.6b04329
  7. Ryan B. Comes and Scott A. Chambers. “Interface structure, band alignment and built-in potentials at LaFeO3/n-SrTiO3 heterojunctions,” Physical Review Letters, 117, 226802, Nov 2016. DOI: 10.1103/PhysRevLett.117.226802
  8. Peng Xu, Yilikal Ayino, Christopher Cheng, Vlad Pribiag, Ryan B. Comes, Peter V. Sushko, Scott A. Chambers and Bharat Jalan.
    “Understanding and controlling charge density in the two-dimensional electron gas at a polar/non-polar oxide interface,” Physical Review Letters, 117, 106803, Sep 2016. DOI: 10.1103/PhysRevLett.117.106803 PNNL Highlight
  9. Ryan B. Comes, Steven R. Spurgeon, Steve M. Heald,
    Despoina M. Kepaptsoglou, Lewys Jones, Phuong Vu Ong, Mark E. Bowden, Quentin M. Ramasse, Peter V. Sushko, and Scott A. Chambers. “Interface-induced Polarization in SrTiO3-LaCrO3 Superlattices,” Advanced Materials Interfaces, 3(10), 1500779, May 2016. DOI: 10.1002/admi.201500779 Pre-print PNNL Highlight
  10. Ryan B. Comes, Tiffany C. Kaspar, Steve M. Heald, Mark E. Bowden and Scott A. Chambers. “Infrared Optical Absorption in Low-spin Fe2+-doped SrTiO3,” Journal of Physics: Condensed Matter28(3), 035901, Jan 2016. DOI: 10.1088/0953-8984/28/3/035901
  11. Yuhan Wang, Ryan B. Comes, Stuart A. Wolf, and Jiwei Lu. “Electrically induced resistive switching in Nb/NbO2/TiN vertical devices,” IEEE Journal of the Electron Devices Society, 4(1), 11-14, Jan 2016. DOI: 10.1109/JEDS.2015.2503922
  12. Xiaopu Li, Chung T. Ma, Jiwei Lu, Arun Devaraj, Steven R. Spurgeon, Ryan B. Comes, and S. Joseph Poon. “Self Exchange Bias and Bistable Magneto-Resistance States in Amorphous TbFeCo thin Films,” Applied Physics Letters, 108, 012401, Jan 2016. DOI: 10.1063/1.4939240
  13. Ryan B. Comes, Peng Xu, Bharat Jalan, and Scott A. Chambers. “Band alignment of epitaxial SrTiO3 thin films with (LaAlO3)0.3-(Sr2AlTaO6)0.7 (001),” Applied Physics Letters, 107, 131601, Sep 2015. DOI: 10.1063/1.4932063
  14. Ryan B. Comes, Sergey Y. Smolin, Tiffany C. Kaspar, Ran Gao, Brent A. Apgar, Lane W. Martin, Mark E. Bowden, Jason B. Baxter, and Scott A. Chambers. “Visible light carrier generation in co-doped epitaxial titanate films,” Applied Physics Letters, 106, 092901, Mar 2015. DOI: 10.1063/1.4913930
  15. Ryan Comes, Kerry Siebein, Jiwei Lu and Stuart A. Wolf. “Microstructural Effects of Chemical Island Templating in Patterned Matrix-Pillar Oxide Nanocomposites,” CrystEngComm, 17, 2041, Mar 2015. DOI: 10.1039/C5CE00025D 
  16. Yuhan Wang, Ryan B. Comes, Salinporn Kittiwatanakul, Stuart A. Wolf and Jiwei Lu. “Epitaxial niobium dioxide thin films by reactive-biased target ion beam deposition,”  Journal of Vacuum Science and Technology A, 33, 021516, Mar 2015. DOI: 10.1116/1.4906143
  17. Matthew A. Steiner, Ryan B. Comes, Jerrold A Floro. William A. Soffa and James M. Fitz-Gerald. “L1’ Ordering Evidence of L10-L12 Hybridization in Strained Fe38.5-Pd61.5 Epitaxial Films,” Acta Materialia, 85, 261-269, Feb 2015. DOI: 10.1016/j.actamat.2014.11.036
  18. Ryan Comes, Peter V. Sushko, Steve M. Heald, Robert J. Colby, Mark E. Bowden, and Scott A. Chambers. “Band-Gap Reduction and Dopant Behavior in La, Cr Co-doped SrTiO3 Thin Films,” Chemistry of Materials, 26, 7073-7082, Dec 2014. DOI: 10.1021/cm503541u
  19. Matthew A. Steiner, Ryan B. Comes, Vincent S. Smentkowski, Jerrold A. Floro, William A. Soffa, and James M. Fitz-Gerald. “Strain Induced Mircrostructural and Ordering Behaviors of Epitaxial Fe38.5Pd61.5 Films Grown by Pulsed Laser Deposition,” Journal of Vacuum Science and Technology A, 31, 050824, Aug 2013. DOI: 10.1116/1.4819376
  20. Hongxue Liu, Ryan Comes, Yonghang Pei, Jiwei Lu, and Stuart A. Wolf. “Structural, magnetic, and nanoscale switching properties of BiFeO3 thin films grown by pulsed electron deposition,” Journal of Vacuum Science and Technology B, 31, 032801, May 2013. DOI: 10.1116/1.4802924
  21. Ryan Comes, Man Gu, Mikhail Khokhlov, Hongxue Liu, Jiwei Lu and Stuart A. Wolf. “Electron Molecular Beam Epitaxy: Layer-by-layer Growth of Complex Oxides via Pulsed Electron-beam Deposition,” Journal of Applied Physics, 113 (2), 023303, Jan 2013. DOI: 10.1063/1.4774238
  22. Ryan Comes, Hongxue Liu, Mikhail Khokhlov, Richard Kasica, Jiwei Lu and Stuart A. Wolf. “Directed Self-Assembly of Epitaxial CoFe2O4-BiFeO3 Nanocomposites,” Nano Letters, 12 (5), 2367-2373, May 2012. DOI: 10.1021/nl3003396
  23. Ryan Comes, Mikhail Khokhlov, Hongxue Liu, Jiwei Lu and Stuart A. Wolf. “Magnetic anisotropy in composite CoFe2O4-BiFeO3 ultrathin films grown by pulsed-electron deposition,” Journal of Applied Physics, 111 (7), Apr 2012. DOI: 10.1063/1.3676413
  24. Ryan Comes, Man Gu, Mikhail Khokhlov, Jiwei Lu and Stuart A. Wolf. “Microstructural and domain effects in epitaxial CoFe2O4 films on MgO with perpendicular magnetic anisotropy,” Journal of Magnetism and Magnetic Materials, 324 (4), 524-527, Feb 2012. DOI: 10.1016/j.jmmm.2011.08.033
  25. Elon Terrell, Ryan Comes, and C. Fred Higgs. “Analysis of Feature-Scale Wear in Chemical Mechanical Polishing: Modeling and Experiments.” Tribology Letters, 37 (2), 327-336, Feb 2010. DOI: 10.1007/s11249-009-9524-5
  26. Ryan Comes, Elon Terrell, and C. Fred Higgs. “Pad Deflection-Based Model of Chemical Mechanical Polishing for Use in CAD IC Layout.” IEEE Transactions on Semiconductor Manufacturing, 23 (1), 121-131, Feb 2010. DOI: 10.1109/TSM.2009.2039182

INVITED SEMINARS

“Engineering Electronic and Optical Properties in Oxides by Design.” Lehigh University, Department of Materials Science and Engineering. Mar. 7, 2016.

“Controlling band structure in complex oxide thin films with dopants and interfaces.” Auburn University, Department of Physics. Feb. 19, 2016

“Engineering Band Structure in SrTiO3 Thin Films with Dopants and Interfaces.” Naval Research Laboratory, Electronics Science and Technology Division. Oct. 5, 2015.

“Engineering Band Structure in SrTiO3 Thin Films with Dopants and Interfaces.” University of Idaho, Department of Chemical and Materials Engineering. April 13, 2015.

“Growth and Patterning of Epitaxial Multiferroic Nanocomposites Using Pulsed Electron Deposition.” Argonne National Laboratory, Materials Science Division. Nov. 28, 2012.

“Epitaxial Multiferroic Nanocomposites: PED Growth and EBL Patterning.” Oak Ridge National Laboratory, Materials Science and Technology Division. Sep. 25, 2012.

“Directed Self-Assembly of Epitaxial Multiferroic Nanocomposites.” Argonne National Laboratory, Materials Science Division. Feb. 29, 2012.

SELECTED CONFERENCE PRESENTATIONS

Ryan B. Comes, Steven R. Spurgeon, Peter V. Sushko, Steve M. Heald, Despoina-Maria Kepaptsoglou, Phuong-Vu Ong, Lewys Jones, Tiffany C. Kaspar, Mark Engelhard, Mark E. Bowden, Quentin M. Ramasse, and Scott A. Chambers. “Interface-induced Polarization in SrTiO3-LaCrO3 Superlattices.” Electronic Materials and Applications 2016, Jan 20, 2016.

Ryan Comes, Peter V. Sushko, Tiffany C. Kaspar, Steve Heald, Mark Bowden, Sergey Y. Smolin, Jason Baxter, Ran Gao, Brent A. Apgar, Lane Martin, and Scott A. Chambers. “Dopant Behavior and Visible Light Absorption in La, Cr Co-doped Titanate Films.” Materials Research Society Spring Meeting 2015, April 9, 2015.

Ryan Comes, Daniel Perea, Mark Engelhard, Mark Bowden and Scott Chambers. “Characterizing Cation Intermixing and Stoichiometry in LaCrO3-SrTiO3 Superlattices via Atom-Probe Tomography and X-ray Photoelectron Spectroscopy.” Materials Research Society Spring Meeting 2015, April 7, 2015.

Ryan Comes, Tiffany Kaspar, Steve Heald, Mark Bowden and Scott Chambers. “Interfacial engineering of optical absorption in epitaxial LaCrO3-SrTiO3 superlattices.” American Physical Society March Meeting 2015, March 2, 2015.

Ryan Comes, Hongliang Zhang, Yingge Du, Robert Colby, Mark Bowden, Tim Droubay and Scott Chambers. “Electronic and optical properties of La,Cr co-doped SrTiO3 epitaxial thin films.” American Physical Society March Meeting 2014, March 5, 2014.

Ryan Comes, Mikhail Khokhlov, Hongxue Liu, Jiwei Lu, and Stuart Wolf. “Self-Assembled Multiferroic Nanocomposites for Use in Magnetic Logic Architecture.” American Physical Society March Meeting 2013, March 19, 2013.

Ryan Comes, Mikhail Khokhlov, Hongxue Liu, Jiwei Lu, and Stuart Wolf. “Magnetic and ferroelectric properties of patterned multiferroic CoFe2O4-BiFeO3 nanocomposites.” American Physical Society March Meeting 2012, February 28, 2012.

Ryan Comes, Hongxue Liu, Mikhail Khokhlov, Jiwei Lu, and Stuart A. Wolf. “E-beam Lithography Directed Self-assembly of CoFe2O4-BiFeO3 Nanocomposites.” Materials Research Society Fall Meeting 2011, November 29, 2011.

Ryan Comes, Mikhail Khokhlov, Hongxue Liu, Jiwei Lu, and Stuart A. Wolf. “Magnetic anisotropy in composite CoFe2O4-BiFeO3 ultrathin films grown by pulsed-electron deposition.” 56th Annual Conference on Magnetism and Magnetic Materials 2011, November 3, 2011.

Mehdi Kabir, Mircea R. Stan, Stuart A. Wolf, Ryan B. Comes and Jiwei Lu. “RAMA: a self-assembled multiferroic magnetic QCA for low power systems.” GLSVLSI ’11. Proceedings of the 21st edition of the Great lakes symposium on VLSI. May 2-4, 2011. DOI

Ryan Comes, Man Gu, Mikhail Khokhlov, Jiwei Lu, and Stuart Wolf. “CoFe2O4 Nanostructures for Magnetic Logic Applications.” American Physical Society March Meeting 2011, March 22, 2011.

Ryan Comes, Richard Kasica, Gerard Henein, Jiwei Lu, and Stuart Wolf. “E-beam lithography patterning of Co/Pd multilayer pillars below 50 nm in diameter.” American Physical Society March Meeting 2010, March 15, 2010.

Kevin West, Dao N. H. Nam, Jiwei Lu, Ryan Comes, and Stuart Wolf. “Intrinsic Exchange Bias in a Single-phase Ferrimagnet.” Materials Research Society Fall Meeting 2009, December 1, 2009.

PROFESSIONAL AFFILIATIONS

Tau Beta Pi, National Engineering Honor Society

Eta Kappa Nu, National Electrical Engineering Honor Society

Phi Beta Kappa, Academic Honor Society

Materials Research Society

American Physical Society

American Vacuum Society

American Ceramics Society

PROFESSIONAL SERVICE

Session Organizer, American Physical Society March Meeting 2017

Peer Reviewer: Nano Letters, Advanced Functional Materials, APL Materials, ACS Applied Materials and Interfaces, Journal of Applied Physics, RSC Advances, Physical Chemistry Chemical Physics and others

AWARDS

Pacific Northwest National Laboratory, Linus Pauling Distinguished Postdoctoral Fellowship, July 2013-Present

Materials Research Society, Graduate Student Silver Award, Spring Meeting, April 2013

University of Virginia, School of Engineering and Applied Science, Graduate Teaching Fellow, Fall 2012

University of Virginia, Dept. of Materials Science and Engineering, Doris Kuhlmann-Wilsdorf Outstanding Graduate Student Award, 2012

University of Virginia, Presidential Research Poster Competition, Finalist, 2012

University of Virginia Engineering Research Symposium, First Place, 2012

University of Virginia Engineering Research Symposium, Fifth Place, 2011

National Defense Science and Engineering Graduate Fellowship, 2010-2013

National Science Foundation, Graduate Research Fellowship Program, Honorable Mention, 2009

University of Virginia, School of Engineering and Applied Science, Dean’s Fellow, 2008-2011

University of Virginia, Vice President of Research and Graduate Studies Fellowship, 2008-2012

First Prize, Sigma Xi Undergraduate Research Poster Competition, Carnegie Mellon Undergraduate Research Symposium, May 2008

First Place, The Eighth Annual Lockheed Martin ECE Undergraduate Project Awards Sponsored by Lockheed Martin, Organized by Eta Kappa Nu, Carnegie Mellon Undergraduate Research Symposium, May 2008

Naval Research Lab SPECIAL-ACT Award for “exceptional performance significantly exceeding normal job requirements”, August 2005