Dr. Sabri Elatresh
Postdoctoral research associate
210A Baker Laboratory, Cornell University
My interests are in the application and development of first-principles methods to problems in physics, material science, and chemistry at extreme conditions. When materials are compressed or heated to high temperature, they undergo electronic and structural phase transition that can lead to significant variations in their physical and chemical properties.
Understanding the properties of materials at extreme conditions of high pressure and temperature is a fundamental problem, because changes in structure, thermodynamic or quantum properties that arise at increased pressure and temperature are often (i) dramatic (ii) counterintuitive, and (iii) are entirely novel properties that are not observed at ambient conditions. The modification of lithium under compression is a good example of such a behavior.
This research involved the use of finite-temperature molecular dynamics to sample atomic configurations; static density functional theory (DFT) to examine the structural stability of candidate phases and calculate electronic properties; and density functional perturbation theory to compute phonon spectra, free energies, and dielectric functions. In addition, I have expertise with calculating anharmonic lattice dynamics and material properties that require going beyond the standard exchange approximations of DFT. Also, I am currently developing a method for analyzing solid structures at finite temperature and drawing a comparison between the local order of finite-temperature solids and liquids. This algorithm can eventually be used for finite-temperature structural prediction.
Education and Employment
2016-present: Postdoctoral Research Associate, Cornell University, Ithaca.
ADVISOR: Roald Hoffmann & Neil W. Ashcroft.
2009- 2015: Ph.D. in Physics, Dalhousie University, Halifax, NS, Canada.
ADVISOR: Stanimir A. Bonev.
2014 Quantum Monte Carlo Summer School
Apuan Alps Centre for Physics at TTI, Vallico Sotto, Tuscany, Ital.
Organizer: Mike Towler – University of Cambridge.
2013 Dalhousie University Certificate in Teaching & Learning
FULFILLED REQUIREMENT: CNLT 5000/5001 Course, Teaching practice, Professional development workshops (a minimum of 20 hours), and the Teaching dossier.
Award & Distinctions
- Best Poster Award at EFree Annual Meeting: (Oct 5, 2016)
(See “Best Poster Awards at EFree Annual Meeting”)
- Libyan-North American Ph.D. Scholarship: (2008-2015)
- Teaching Assistant Award: (May 22, 2014)
(Yearly award in recognition of a teaching assistant who has provided an exceptional contribution to teaching in the department)
- Dr. W. Leiper Graduate Awar: (2012)
(Yearly award to a grad student with special ability pursuing a graduate degree in physics)
Published & In Review
- Sabri F. Elatresh, Weizhao Cai, N. W. Ashcroft, Roald Homann, Shanti Deemyad, and Stanimir A. Bonev “Evidence from Fermi surface analysis for the low-temperature structure of lithium”, Proceedings of the National Academy of Sciences (PNAS) (2017)
- Yuta Tsuji, Prasad L. V. K. Dasari, S. F. Elatresh, Roald Hoffmann, and N. W. Ashcroft “Structural Diversity and Electron Confinement in Li4N; the Potential for 0-D, 2-D and 3-D Electrides”, J. Am. Chem. Soc., DOI: 10.1021/jacs.6b09067 (2016)
- S. F. Elatresh, S. A. Bonev, E. Gregoryanz, and N. W. Ashcroft
“Role of Quantum Ion Dynamics on Melting of Lithium”
Physical Review B 94, 104107 (2016)
- F. Gorelli, S. F. Elatresh, C. L. Guillaume, M. Marques, G. J. Ackland, M. Santoro, S. A. Bonev, and E. Gregoryanz. “Lattice Dynamics of Dense Lithium”, Phys. Rev. Lett. 108, 055501 (2012)
- S. F. Elatresh, V.Askarpour, and S. A. Bonev
Stability of Solid Oxygen at High Pressure”
(Submitted to Physical Review Letters)
- S. F. Elatresh, Mohamed Mansor, A. A. Alshreef, and S. Farhat
“On helium energy levels Hartree-Fock numerical calculations”
Second Basic Sciences Conference, Tripoli, Libya (2007)
Manuscripts in Preparation
- V.Askarpour, S. F. Elatresh, and S. A. Bonev
“Hybrid Functional Study of the - Transition in Solid Oxygen”.
(To be submitted to Physical Review Letters)
- S. F. Elatresh, S. A. Bonev, N. W. Ashcroft, and Roald Hoffmann “Structure Prediction and Phase Stability of Solid Li at High Pressure”. (In preparation)
- S. F. Elatresh, V. Askarpour, and S. A. Bonev
“Melting Oxygen at High Pressure”. (In preparation)
- EFree Annual Meeting at \Argonne National Laboratory”, October 3-5, 2016, Chicago,
IL United State
- Title: ‘Materials under high pressure“
- American Physical Society, March Meeting, Mar. 3-7, 2014, Denver, Colorado
Title: “The -0 Transition in Solid Oxygen in High Pressure“
- APS-SCCM/AIRAPT Conference July 7-12th, 2013 in Seattle, Washington
Title: “Stability of Solid Oxygen at High Pressure“
- American Physical Society, March Meeting, Feb. 27-Mar. 2, 2012, Boston, MA
Title: “Finite-Temperature Solid Phases and Melting of Dense Lithium“
- American Physical Society, March Meeting, Mar. 21-25, 2011, Dallas, TX
Title: “On the Role of Quantum Ion Dynamics for the Anomalous Melting of Lithium“
- The Second Basic Sciences Conference, Nov. 4-8, 2007, Tripoli University, Libya
Title: “On Helium Energy Levels Hartree-Fock Numerical Calculations“
- EFree Annual Meeting, October 3-5, 2016, Argonne National Laboratory, Chicago IL
United StatesTitle:“Ground state of lithium: evidence from Fermi surface analysis”
- Gordon Research Conference on Research at High Pressure, July 17-22, 2016, Holderness School in Holderness NH United States
Title:“Structure Prediction and Phase Stability of Solid Li at High Pressure”
- Gordon Research Conference on Research at High Pressure, June 22-27, 2014, University of New England Biddeford, ME
Title:”Molecular Phases of Solid Oxygen at High Pressure
- Gordon Research Conference on Research at High Pressure, June 24-29, 2012, University of New England Biddeford, ME
Title: “Finite-Temperature Solid phases and Melting of Dense Lithium”
- Graduate Seminars 2015, Department of Physics & Atmospheric Science, Mar. 2, 2015
Title: “Scientific Interplay: Borrowing Computational Techniques from Physics”
- Graduate Seminars 2013, Department of Physics & Atmospheric Science, Feb. 5, 2013
Title: “Finite-temperature solid phases and melting of dense lithium”
- Fortran, Bash Script, Python, R
- ABINT, VASP, Maple, Phon, SCPH, VMD, LATEX