Richard G. Hennig
Assistant Professor of Materials Science and Engineering
Address:
126 Bard Hall
Department of Materials Science and Engineering
Cornell University
Ithaca, NY 14853-1501
Phone: 607-255-6429
Fax: 607-255-2365
E-mail: rhennig@ccmr.cornell.edu
Hennig research group page
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Professor Hennig received his Diplom in Physics at the University
of Göttingen in 1996 and his Ph.D. in Physics from Washington
University in St. Louis in 2000. After working as a postdoctoral
researcher and research scientist at Ohio State University, he joined
the faculty of the Department of Materials Science and Engineering at
Cornell in 2006.
I currently do have two postdoc positions starting immediately
(click here for more information) and a
position for a graduate student starting Fall 2009. If you are
interested in a career in computational materials science, please
apply for the graduate
program in Materials Science at Cornell University and contact
me.
If you are an undergraduate or graduate student at Cornell
University and interested in a career in computational materials
science, please contact me.
Description of research:
My research focuses on atomistic computation of defects, phase
transitions, electronic properties and mechanical behavior of
materials.
Highlights of my previous research come from structural alloys,
defects in semiconductors and atomic structure of quasicrystals:
- Prediction of novel crystal structures and materials properties
under extreme conditions.
- The prediction of the atomic mechanism for the pressure-induced
structural phase transformation in pure Ti. Finding the
mechanism requires a new method for searching crystal
transformation pathways.
- The calculation of solute and interstitial effects on the alpha
to omega transformation in Ti. This explained the role of as
little as 1% oxygen in stopping the transformation in
shock-loaded Ti.
- The evolution of defects in silicon from point defects to
extended structures. The interstitial defects exhibit a
surprising complexity of structures and structural
transitions.
- The atomic structure and stability of transition metal
quasicrystals. The aperiodic structure of quasicrystals
required new methods of structural analysis combining
first-principles calculations with neutron and x-ray
diffraction data.
Selected papers:
- Emergent reduction of electronic state dimensionality in dense
ordered Li-Be alloys.
J. Feng, R. G. Hennig, N. W. Ashcroft and Roald Hoffmann.
Nature 451, 445 (2008).
[web]
- Alleviation of the Fermion-Sign Problem by Optimization of
Many-Body Wave Functions.
C. J. Umrigar, J. Toulouse, C. Filippi, S. Sorella and R. G. Hennig.
Physical Review Letters 98, 110201 (2007).
[PDF]
- Comparison of screened hybrid density functional theory to
diffusion Monte Carlo in calculations of total energies of
silicon phases and defects.
E. R. Batista, J. Heyd, R. G. Hennig, B. P. Uberuaga, R. L. Martin,
G. E. Scuseria, C. J. Umrigar, and J. W. Wilkins.
Physical Review B 74, 121102(R) (2006).
[PDF]
- Impurities block the alpha to omega martensitic transformation in titanium.
R. G. Hennig, D. R. Trinkle, J. Bouchet, S. G. Srinivasan, R. C. Albers,
and J. W. Wilkins.
Nature Materials 4, 129 (2005).
[PDF]
- Complexity of small silicon self-interstitial defects.
D. A. Richie, J. Kim, S. A. Barr, K. R. A. Hazzard, R. G. Hennig,
and J. W. Wilkins.
Physical Review Letters 92, 45501 (2004).
[PDF]
- Structure of the icosahedral Ti-Zr-Ni quasicrystal.
R. G. Hennig, A. E. Carlsson, K. F. Kelton, and C. L. Henley.
Physical Review B 67, 134202 (2003).
[PDF]
(last revised September 13, 2008)
