Ronald Cohen
Staff Scientist
Phone: 
(202) 478-8937

Ronald E. Cohen's primary focus is the study of materials through first principles research including properties of materials under extreme conditions such as high pressure and temperature. His research is applied to topics and problems in geophysics and technological materials. He obtained a Ph.D in geology from Harvard University in 1985, and a BSc in geology from Indiana University in 1979.


Recent workshops

May 2016

Defect Dipole Enhanced Electromechanical Coupling, Shi Liu, H. Takenaka, R. Vadapoo, M. Ahart, Margo Staruch, Peter Finkel, Jun Luo, and R.E. Cohen, 2016 International Workshop on Acoustic Transduction Materials and Devices , Penn State

May 2016

Strong Coupling Ferroelectrics, How They Work and How They Can Be Improved, Advanced Microscopy and Theoretical Calculations (AMTC5) in Nagoya, Japan

March 31, 2016

Quantum Monte Carlo simulations and applications to silicate perovskite and other high pressure phases, Physics, UCL

January 14, 2016

The perovskite to post-perovskite transition and their properties from Quantum Monte Carlo,  University of Edinburgh, CSEC

January 8, 2016

The perovskite to post-perovskite transition and their properties from Quantum Monte Carlo, LMU, Munich, Dept. Geo- und Umweltwissenschaften, Kristallographie, Materials Seminar

Dec 14-18, 2015

Electrical conductivity in the mantle and core and implications for the geodynamo, AGU Fall Meeting, San Francisco

Sept. 6-10, 2015

Quantum Monte Carlo for Materials at High Pressures, Cohen, Psi-k Conference, Donostia-San Sebastián, Spain

Sept 30- Oct 4, 2015

Pressure on Correlated Materials: Transport in iron and implications for the geodynamo, and electronic transitions in iron compounds, Keynote speaker, Joint AIRAPT-25-EHPRG-53, Madrid, Spain

May 5, 2015

Equation of state and phase transitions of (Mg,Fe)SiO3 perovskite and post-perovskites from quantum Monte Carlo and Density Functional Theory, 2015 Joint Assembly Meeting, AGU, Montréal Québec, Canada

March 19, 2015

Theory of large coupling ferroelectrics, Dept. of Applied Physics, Hebrew University, Jerusalem, Israel

March 16, 2015

Effects of electron correlations on iron and iron-bearing minerals in the Earth, Earth Science Institute, Hebrew University, Jerusalem, Israel

Nov 18, 2014

Quantum Monte Carlo for Materials at High Pressures, Dept. Physics, Rutgers University

July 30, 2014

Quantum Monte Carlo simulations on silicate perovskite and other high pressure phases, Quantum Monte Carlo in the Apuan Alps IX, TTI, Vallico Sotto, Tuscany, Italy

June 2014

Is PPV the last mantle phase transition?

PPv@10: A meeting for the 10th anniversary of the discovery of post-perovskite 

University of Bristol

May 2014

Behaviour of transition metals and transition metal oxides under pressure

University of Tokyo

Importance of electron correlations in iron compounds: DFT/DMFT computations

University of Edinburgh

Behaviour of transition metals and transition metal oxides under pressure and effects on transition metal dopants on ferroelectrics

Waseda University

Effects of Mn on electromechanical properties of ferroelectrics

31st Meeting on Ferroelectric Materials and Their Applications 

Kyoto, Japan

February 2014

Properties of iron under core conditions

Workshop on Elastic Properties of Iron in Extremem Conditions

Takarazuka, Japan

May 2013

Effects of Mn on electromechanical properties of relaxor ferroelectrics

International Workshop on Acoustic Transduction Materials and Devices

Related News

Department
Nagoya, Japan, 11 May 2016—Ronald Cohen was an invited speaker at the AMTC5 workshop in Nagoya May 11-13, 2016 and spoke on "Strong Coupling Ferroelectrics, How They Work and How They Can Be Improved."  He then visited ELSI (Earth and Life Sciences Institute) at Tokyo Tech and spoke on “First-principles studies of the deep Earth.”
High Pressure
Washington, DC— Hydrogen is deceptively simple. It has only a single electron per atom, but it powers the sun and forms the majority of the observed universe. As such, it is naturally exposed to the entire range of pressures and temperatures available in the whole cosmos.
Materials
Washington, DC--Researchers at the Carnegie Institution have discovered a new efficient way to pump heat using crystals.
High Pressure
Washington, DC—The crushing pressures and intense temperatures in Earth’s deep interior squeeze atoms and electrons so closely together that they interact very differently. With depth materials change.
High Pressure
A discovery by scientists at the Carnegie Institution has opened the door to a new generation of piezoelectric materials that can convert mechanical strain into electricity and vice versa, potentially cutting costs and boosting performance in myriad applications ranging from medical diagnostics t