Print this page Geophysical Laboratory on Facebook Geophysical Laboratory on Flickr Click for RSS

Research Scientists

Muhetaer Aihaiti
Research Scientist
E-mail: maihaiti@ciw.edu
Phone: 202-478-8932

Muhetaer Aihaiti (Muhtar Ahart) conducts research in high-pressure physics that is aimed largely at problems in ferroelectrics, relaxor ferroelectrics, polymers, and novel materials. He uses light scattering spectroscopy, synchrotron x-ray diffraction, and diamond anvil cell techniques to study the pressure effects on the classic ferroelectric, relaxor ferroelectric, and polymer materials, particularly, in investigations of elastic, piezo-properties and structural phase transitions in these materials. He is also active in multimegabar experiments on simple molecular systems using techniques such as synchrotron infrared spectroscopy.

 

John Armstrong
Microbeam Specialist
E-mail: jarmstrong@ciw.edu
Phone: 202-478-8918

John Armstrong oversees the electron microprobe and electron microscopy laboratories at the Carnegie Institution of Washington. His research includes development of the physical correction algorithms and analytical procedures for high accuracy quantitative analysis with electron microbeam instruments and their application to the characterization of geological and planetary materials. He has developed, operated and supervised microprobe laboratories at NIST, Caltech and Procter & Gamble. He also has experience with several generations of analytical scanning electron microscopes, analytical scanning transmission electron microscopes, ion microprobes, UHV Auger electron microprobes, as well as x-ray emission spectrometers, x-ray diffraction and x-ray fluorescence equipment. A past president of the Microbeam Analysis Society and recipient of its Presidential Science Award, he regularly lectures at the advanced x-ray microanalysis summer schools at Lehigh University and holds adjunct faculty positions at American University and Pepperdine University (DC campus), where he teaches earth science and astronomy. He received his Ph.D. in geochemistry from Arizona State University in 1978 and a B.S. in chemistry from Loyola Marymount University.

 

Maria Baldini
Research Scientist
E-mail: mbaldini@ciw.edu

Maria Baldini works on various beamlines at HPSynC and develops advanced x-ray techniques and instrumentation for use in high-pressure research. Her research focuses on understanding the effects of pressure on the physical properties of strongly correlated electron systems. She received her Ph.D. in material science from the University of Sapienza, Rome, Italy in 2007.

 

Nabil Boctor
Emeritus Research Scientist
E-mail: nboctor@ciw.edu
Phone: 202-478-8949

Nabil Boctor researches phase equilibria, kinetics of mineral reactions, element partitioning between minerals and melts, and igneous and ore petrology. Boctor did his Ph.D. research with former Geophysical laboratory staff Gunnar Kullerud in the area of sulfide phase equilibria.

 

Reinhard Boehler
Senior Scientist
E-mail: rboehler@ciw.edu
Phone: 202-478-8950

Reinhard (Reini) Boehler works on a broad range of problems in high pressure science and technology, particularly those related to major energy challenges. His research interests include the thermal properties of metals at very high pressure, the adiabatic gradient, thermal expansivity of simple metals, as well as Earth mantle and core materials. He obtained a Ph.D. and M.S. in mineralogy, and a B.S. in chemistry and physics from Universität Tübingen, Germany in 1974, 1970 and 1968.

 

Arunkamar Bommannavar
Beamline Control Scientist
E-mail: abommannavar@ciw.edu
Phone: 630-252-0497

Arun Bommannavar is the beamline control scientist at HPCAT. He is responsible for implementing EPICS controls for beamline control and data acquisition. His Ph.D. thesis was on studying Magnetic Relaxation Phenomenon in Ferrites using Mossbauer Spectroscopy.

 

Xiaojia Chen
Research Scientist
E-mail: xjchen@ciw.edu
Phone: 202-478-8924

Xiao-Jia Chen works in condensed matter physics. His research is focused on magnetism and superconductivity of materials under high pressure. Currently, he is coordinating the Spallation Neutrons and Pressure (SNAP) project - the exciting new high-pressure neutron science at the Spallation Neutron Source, Oak Ridge National Laboratory.

 

Paul Chow
Beamline Scientist
E-mail: pchow@ciw.edu
Phone: 630-252-4015

Paul Chow is a beamline scientist. He received a Ph.D. in Physics from University of Illinois and conducted research at the University of Houston. He spent 2 years at BL12XU, the Taiwan Beamline at SPring-8, designing and commissioning a spectrometer for inelastic x-ray scattering. Presently, he is a beamline scientist for HP-CAT at the spectroscopy station 16ID-D at the Advanced Photon Source. His interest is in electronic excitations in metals.

 

Katherine Crispin
MIcrobeam Specialist
E-mail: kcrispin@ciw.edu
Phone: 202-478-8986

Katherine maintains the (FIB-FESEM) Focused Ion Beam Field Emission Scanning Electron Microscope and also assists users on the SEM and Microprobe. She researches new techniques and applications involving the microbeam instruments and collaborates on research involving pallasite meteorites. She is a Director of the MicroAnalysis Society, and an Associate Editor of American Mineralogist. Her previous research was focused on diffusion in lower mantle minerals where she investigated the effect of crystal field stabilization energy on diffusion rates of transition metals in periclase. She received a Ph.D. in Geological Sciences from Case Western Reserve University and a B.S. in Chemistry from Cedar Crest College.

 

Dionysis Foustoukos
Research Scientist
E-mail: dfoustoukos@ciw.edu
Phone: 202-478-8968

Dionysis Foustoukos is an experimental geochemist studying the evolution of geofluids in a wide range of natural environments. His research activities focus mainly on the evolution of submarine volcanoes; the habitability of deep-sea extreme environments; and the geochemical interactions between Earth’s upper mantle, crust and oceans. He develops novel experimental designs to investigate natural processes under controlled laboratory conditions, and he has been involved in oceanographic expeditions at the Pacific Ocean and the Mediterranean Sea. He obtained a Ph.D. in geochemistry from the University of Minnesota in 2005, and a B.S. from the Aristotle University of Thessaloniki in 1997.

 

Stephen Gramsch
Research Scientist and DOE Programs Coordinator
E-mail: sgramsch@ciw.edu
Phone: 202-478-8939

Steve oversees operations of two DOE-funded centers headquartered at the Geophysical Laboratory. The Carnegie-DOE Alliance Center (CDAC) is a Center of Excellence for High Pressure Science and Technology funded by Stockpile Stewardship Academic Programs, a DOE/NNSA initiative focused on graduate student education and training in key areas of fundamental science important to the NNSA mission. The Energy Frontier Research in Extreme Environments Center (EFree) is an Energy Frontier Research Center supported by the DOE Office of Science and is dedicated to the study of materials at extreme conditions of pressure and temperature as a means to accelerate the discovery of transformative materials for energy applications. Steve also coordinates the Summer Scholars Program, which provides undergraduate students a rigorous introduction to scientific research. For more information on CDAC, (https://cdac.carnegiescience.edu), EFree (https://efree.carnegiescience.edu), or the Summer Scholars Program (https://www.gl.ciw.edu/static/groups/summerscholars), please visit our websites.

 

Kadek Hemawan
Research Scientist
E-mail: khemawan@ciw.edu
Phone: 202-478-8984

Kadek Hemawan is a research scientist at the Geophysical Laboratory. His research activities are comprised of microwave plasma chemical vapor deposition carbon based materials, diamond characterizations, CVD reactor optimization and micro plasma discharge investigation at higher pressure. He received his Ph.D. from Michigan State University.

 

Duck Young Kim
Research Scientist
E-mail: dkim@ciw.edu
Phone: 202-478-8944

Duck Young Kim obtained his Ph.D. at Uppsala University in Sweden and conducted his postdoctoral study with the Theory of Condensed Matter (TCM) Group, Cavendish Laboratory, University of Cambridge, U.K. His research focuses on understanding the phase transition of materials under pressure, especially the metallization/superconductivity of hydrides and elements in the periodic table using first-principle calculations. He is a research scientist working in the high pressure thrust area to bridge the gap between theory and experimental approaches to problems in high-pressure research.

 

Yoshio Kono
Beamline Scientist
E-mail: ykono@ciw.edu

Yoshio Kono is a Beamline Scientist at HPCAT. He is responsible for developing elastic wave velocity measurement by ultrasonic technique in conjunction with Paris-Edinburgh press and high-pressure synchrotron techniques. Yoshio began his career at Carnegie as a Research Scientist and was promoted to Beamline Scientist in July 2012. He is interested in studying elasticity and equation of state of materials at high pressures and high temperatures. He received a Ph.D. from Yokohama National University, Japan in 2006.

 

Zhenxian Liu
NSLS IR Program Director
E-mail: zxliu@bnl.gov
Phone: 631-334-5502

Zhenxian Liu is a lead beamline scientist for the Frontier Synchrotron Infrared Spectroscopy Beamline under Extreme Conditions (FIS), currently under construction at National Synchrotron Light Source II, Brookhaven National Laboratory. FIS is the successor of U2A beamline, a dedicated high-pressure infrared diamond anvil cell facility at NSLS, which has been managed by Geophysical Laboratory since 1999. He develops novel experimental techniques (e.g., vacuum far-IR spectroscopy down to 30 cm-1 at high pressure) and assists users in carrying out research projects in geoscience, planetary science, materials science, condensed matter physics, chemistry, and biology. He also uses synchrotron infrared spectroscopy, Raman scattering, photoluminescence as well as synchrotron x-ray diffraction techniques to explore physical and chemical properties and phase transitions of hydrous minerals, simple molecular systems, and nanoscale materials at high pressures and variable temperatures.

 

Sergey Lobanov
Research Scientist
E-mail: slobanov@ciw.edu
Phone: 202-478-8995

Sergey Lobanov arrived from V.S. Sobolev Institute of Geology and Mineralogy (Novosibirsk, Russia). He will be working with Alexander Goncharov on DCO project. His research area includes both theoretical and experimental modeling of the volatiles behavior in deep planetary interiors, with respect to mantle petrology and diamond mineralogy. In the GL he will perform laser heating diamond anvil cell experiments on C-H and C-O-H systems. As well as he will be engaged in other high pressure projects.

 

Yue Meng
Beamline Scientist
E-mail: ymeng@ciw.edu
Phone: 630-252-0483

Yue Meng is a beamline scientist. She researches the properties of materials at high pressure and temperature, using experimental techniques including x-ray spectroscopy, x-ray diffraction, optical spectroscopy, neutron diffraction, with applications to physics, chemistry, materials science, and geophysics. As one of the pioneers in developing high-pressure IXS, she has applied the technique to studies of electronic bonding changes in several low-Z materials at high pressure. At HPCAT, she is responsible for the development and operation of micro-focused x-ray diffraction with in-situ laser heating for structural properties at simultaneous ultra-high PT conditions.

 

Yufei Meng
Research Scientist
E-mail: yfmeng@ciw.edu
Phone: 202-478-8959

Yufei Meng works with the CVD diamond group at the Lab as a postdoctoral fellow. Her research focuses on the defects in different diamonds and their influence to properties and formation. Room R-147

 

Ivan Naumov
Research Scientist
E-mail: inaumov@ciw.edu
Phone: 202-478-8942

Ivan Naumov’s research interests are in theoretical modeling and understanding of real materials with considerable fundamental and/or technological relevance. Using first-principles density functional methods, ab-initio derived Hamiltonian approach coupled with Monte-Carlo simulations, and other techniques, he explores a broad array of structural, electronic, vibrational, and transport properties of materials such as ferroelectrics, superconductors, shape-memory alloys and graphene-based nanostructures. R-106

 

Changyong Park
Beamline Scientist
E-mail: cpark@ciw.edu

Changyong Park is a Beamline Scientist at HPCAT. He is responsible for developing and integrating novel high-pressure synchrotron techniques, supporting HPCAT operations and conducting original research. His research interests include amorphous and liquid structure of refractory materials under high pressure, structure and property correlations, and physics and chemistry of mineral-fluid interfaces.

 

Dmitry Popov
Beamline Scientist
E-mail: dpopov@ciw.edu
Phone: 630-252-7106

Dmitry Popov is a Beamline Scientist at HPCAT. His duties include user support and development of experimental techniques for high-pressure studies. His original research is focused on development of X-ray diffraction method to collect high resolution data on selected single-crystals under extreme pressure/temperature conditions.

 

Craig Schiffries
Deep Carbon Observatory Director
E-mail: cschiffries@ciw.edu
Phone: 202-478-8819

Schiffries received his Ph.D. in geology from Harvard and is currently the Director of the Deep Carbon Observatory at the Geophysical Laboratory of the Carnegie Institution in Washington. He completed his undergraduate work at Yale where he graduated summa cum laude with a double major in geology and geophysics, and economics and political science. He also earned a master's degree in geology and geophysics at Yale, and then an honors B.A. in philosophy, politics, and economics at Oxford University. He has received numerous fellowships and awards, including: Hertz Foundation Graduate Fellowship, Marshall Scholarship to Oxford University, Yale's Belknap Prize, Burton P. Twichell Memorial Scholarship at Yale, and Bank of America Scholarship for Science and Mathematics. Schiffries has also done fieldwork in North America, India, South Africa, and the USSR. Craig will help lead the continued development of the Deep Carbon Observatory (DCO) and the establishment of a broad international coalition of scientists and organizations devoted to the study of carbon in the Earth. He served as Director for Geoscience Policy at the Geological Society of America, where he provided advice to Congress and policy makers on a broad range of geoscience issues. He and his office have provided advice to Congress and policy makers on many geoscience issues. He is a former Carnegie Fellow (1988-1990) at the Geophysical Laboratory, so his new position represents a return to Carnegie. His scientific research focused on water-rock interactions and economic geology.

 

Guoyin Shen
HPCAT Director
E-mail: gshen@ciw.edu
Phone: 630-252-0429

Guoyin Shen's research covers a broad range of subjects aimed at understanding the behavior of materials under high-pressure and extreme temperature conditions. The research activities include investigation of phase transformations and melting lines in molecular solids, oxides and metals; characterization of liquids and amorphous materials under high-pressure/temperature conditions; measurement of crystal chemistry, elastic and transportation properties of deep Earth materials at pressure-temperature conditions equivalent to the Earth’s interior. His current research includes the study of structure and density of silicate liquids at high pressure and melting temperature determinations of silicates and iron alloys at Megbar pressures.

 

Jinfu Shu
Research Scientist
E-mail: jshu@ciw.edu
Phone: 202-478-8963

Jinfu Shu's research interests are in high pressure synchrotron x-ray single crystal studies, diamond inclusions, and micromineral studies. Jinfu earned his Ph.D. at Wuhan College of Geology in China in 1987.

 

Stanislav Sinogeikin
Associate Director of HPCAT
E-mail: ssinogeikin@ciw.edu
Phone: 630-252-4038

Stanislav (Stas) Sinogeikin is the Associate Director of HPCAT. His diverse research interests include mineralogy of the upper mantle and transition zone of the Earth, physical (especially elastic) properties of materials at high pressures and temperatures, applications of high-pressure mineral physics to the dynamics of the Earth’s interior, time-resolved studies of materials at high pressure, and development of x-ray microdiffraction and spectroscopic techniques and supporting facilities and sample environment devices for at high pressure and temperature studies.

 

Maddury Somayazulu
Research Scientist
E-mail: msomayazulu@ciw.edu
Phone: 202-478-8911

Maddury Somayazulu is the CDAC laboratory manager and research scientist at the Geophysical Laboratory. He manages the diamond anvil cell laboratory and the gas-loading laboratory in addition to pursuing his research on high pressure-high temperature materials physics and chemistry.

 

Lin Wang
HPSynC Research Scientist
E-mail: lwang@ciw.edu

Lin Wang is a research scientist at HPSync and a senior investigator work for EFree. His principal research interests are the properties of nano materials under high pressure; Synthesis of nano materials, Properties of low dimensional materials and High Tc superconductor, Nano focused Synchrotron x-ray, and diamond anvil cell techniques for ultra-high pressure.

 

Yuming Xiao
Beamline Scientist
E-mail: yxiao@ciw.edu
Phone: 630-252-4058

Yuming Xiao is a beamline scientist at HPCAT of Geophysical Laboratory. He received his Ph.D. from Department of Applied Science at University of California, Davis in 2007. His thesis was focused on studying metal clusters in metalloproteins (nitrogenase and hydrogenase) with synchrotron spectroscopes (EXAFS, NFS, NRVS, XES). At HPCAT, Yuming is interested in studying electronic and magnetic properties of materials under pressure using synchrotron spectroscopes.

 

Wenge Yang
Research Scientist
E-mail: wyang@ciw.edu
Phone: 630-252-0487

Wenge Yang received his Ph.D in Condensed Matter Physics in 1995. The focus of his research effort is to develop novel synchrotron radiation techniques (x-ray diffraction, imaging and spectroscopy) for high pressure research.

 

Qiaoshi Zeng
Research Scientist
E-mail: qzeng@ciw.edu

Qiaoshi(Charles) Zeng is a research scientist at HPSynC. His research interest is focused on understanding the structure and properties of amorphous materials and new materials synthesis by developing and utilizing various high pressure techniques including x-ray diffraction, imaging and spectroscopy etc. He received his PhD in materials science and engineering from Zhejiang University, China in 2010.

 

Changsheng Zha
Research Scientist
E-mail: czha@ciw.edu
Phone: 202-478-8948

Chang-Sheng Zha is a research scientist, who develops and uses a variety of experimental techniques. These techniques include Raman, Brillouin spectroscopy, and synchrotron x-ray diffraction combining the extreme P-T conditions for the study of physics, chemistry, geoscience and material science. His current interests are focusing on the properties of hydrogen and other molecular crystals under multiple megabar pressure range and extreme temperatures. Zha was a staff scientist in charge of the high pressure program at Cornell High Energy Synchrotron Source (CHESS) before moving to the Geophysical Laboratory.