Materials Dynamics Laboratory
Associate Chief Scientist
Alfred BARON (Ph.D.)
The focus of the laboratory is the dynamics of materials on meV energy scales (THz frequencies) and atomic length scales, as measured using inelastic x-ray scattering. The largest project of the lab is the design and construction of a new and uniquely powerful beamline for inelastic x-ray scattering. It should provide unprecedented capability to measure both atomic dynamics and electronic excitations with high resolution. Other projects include investigation of phonons in correlated-electron materials, especially superconductors, liquid dynamics, elastic constants of materials under pressure, and development of instrumentation for new measurements, especially x-ray optics.
- Investigation of phonons and electronic scattering in superconductors, such as iron pnictides and the copper-oxide high-Tc materials.
- Investigations of liquid dynamics, especially surface as dynamics.
- Elastic constants of materials under pressure.
- Development of new x-ray scattering techniques, especially for momentum-resolved optical (electronic) spectroscopy.
- Design & construction of a new beamline for inelastic x-ray scattering at SPring-8 with an order of magnitude more flux.
- Baron A Q R, Tanaka Y, Goto S, Takeshita K., Matsushita T, Ishikawa T.:
"An X-Ray Scattering Beamline for Studying Dynamics"
Journal of Physics and Chemistry Solids, 61, 461-465 (2000) - Fukui H. Katsura T, Kuribayashi T, Matsuzak T, Yoneda A, Ito, Kudoh Y, Tsutsui S., BaronA.Q.R.:
"Precise determination of elastic constants by high-resolution inelastic X-ray scattering"
Journal of Synchrotron Radiation 15, 618-623 (2008) - Baron A Q R, Uchiyama H, Tanaka Y, Tsutsui S, Ishikawa D, Lee S, Heid R, Bohnen K.-P, Tajima S, Ishikawa T.:
"Kohn Anomaly in MgB by Inelastic X-Ray Scattering"
Physical Review Letters, 92, 197004 (2004) - A Q R Baron, H Uchiyama, R Heid, K P Bohnen, Y tanaka, S Tsutsui, D Ishikawa, S Lee, S Tajima.:
"Two-phonon contributions to the inelastic x-ray scattering spectra of Mg2"
Physical Review B 75 020505(R) (2007) - Ishikawa D, Inui M, Matsuda K., Tamura K., Tsutsui S, Baron A Q R.:
"Fast sound in expanded fluid Hg accompanying the metal-non-metal transition"
Physical Review Letters 93 97801 (2004) - Uchiyama H, Baron A Q R, Tsutsui S, Tanaka Y, Hu W Z, Yamamoto A., Tajima S, Endoh Y.:
"Softening of the Cu-O bond stretching phonon in tetragonal HgBa2CuO4+5"
Physical Review Letters 92 197005 (2004) - Marc de Boissieu, Sonia Francoual, Marek Mihalkovi, Kaoru Shibata, Alfred Q. R. Baron, Yvan Sidis, Tsutomu Ishimasa, Dongmei Wu, Thomas Lograsso, Louis-Pierre Regnault, Franz Gahler, Satoshi Tsutsui, Bernard.:
"Lattice dynamics of the Zn-Mg-Sc icosahedral quasicrystal and its Zn-Sc periodic 1/1 approximant"
Nature Materials 6, 977 - 984 (2007), Published online: 4 November 2007 - D. Ishikawa and A.Q.R. Baron.:
"Temperature gradient analyzers for compact high-resolution X-ray spectrometers."
Journal of Synchrotron Radiation, 17 (2010) 12-24 - S. Hosokawa, M. Inui, Y. Kajihara, K. Matsuda, T. Ichitsubo, W.-C. Pilgrim, H. Sinn, L. E. González, D. J. Gonzalez, S. Tsutsui, and A. Q. R. Baron.:
"Transverse Acoustic Excitations in Liquid Ga "
Physical Review Letters 102 (2009) 105502
Principal Investigator
- Alfred BARON
- Associate Chief Scientist
Postdoctoral Fellow
- David Shai ELLIS
- Postdoctoral Researcher