Muhetaer Aihaiti (Muhtar Ahart) runs the Brillouin Spectroscopy Laboratory at the Geophysical Laboratory. His research in high-pressure physics is aimed largely at problems in ferroelectrics, relaxor ferroelectrics, polymers, and novel materials. His current research is focused on 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. In addition to high-pressure Brillouin and Raman measurements in the diamond-anvil cell at the Carnegie Institution of Washington, Muhetaer is also active in the areas of synchrotron-based x-ray diffraction studies at the Advanced Photon Source, Argonne National Laboratory on beamlines at Sector 11 and HPCAT. Muhetaer received his Ph.D. from University of Electrocommunications of Tokyo in 1996.
Ahart, M., S. Kojima, N. Yasuda, and R. J. Hemley, Successive pressure-induced structural transitions in relaxor lead indium Niobate Ferroelectrics, 467, 138-145 (2014).
Stavrou, E., M. Ahart, M. F. Mahmood, and A. F. Goncharov, Correlation between structural and vibrational lengths of Kel F-800 polymeric glass under pressure Scientific Reports 3, 1290 (2013).
Ahart, M., C. DeVreugd, D. D. Viehland, P. M. Gehring, and R. J. Hemley, X-ray diffraction study of the pressure-induced bcc-to-hcp phase transition in highly magnetostrictive Fe-Ga alloy Phys. Rev. B 88, 184102 (2013).
Zha, C., Z. Liu, M. Ahart, R. Boehler, and R. J. Hemley, Infrared Spectroscopy of Hydrogen Phase IV Phys. Rev. Lett. 110, 217402 (2013).
Benjamin, A., M. Ahart, S. Gramsch, L. L. Stevens, E. B. Orler, D. M. Dattelbaum, and R. J. Hemley, Acoustic properties of the polymer Kel F-800 up to near Megabar Pressures J. Chem. Phys. 137, 014514 (2012).
Ahart, M., S. Sinogeikin, O. Shebanova, D. Ikuda, Z.-G. Ye, H. K. Mao, R. E. Cohen, and R. J. Hemley, Pressure-dependence of the monoclinic phase in the Pb(Mg1/3Nb2/3)O3-PbTiO3 solid solutions Phys. Rev. B 86, 224111 (2012).