大型放射光施設 SPring-8

  Beginning the afternoon of Monday, 13 February, there will be a workshop on high-resolution inelastic x-ray scattering (IXS). This will (1) focus on scientific opportunities with a long undulator beamline and (2) serve as a partial subgroup meeting to discuss phonon measurements in highly correlated electron materials.

   The purpose of the first part (which takes place mostly on 2/14) is to help develop a scientific case for building a new long-undulator beamline dedicated to high-resolution inelastic x-ray scattering. This beamline should provide a factor of 5 more flux than is presently available and is expected to open new possibilities for measurements of the dynamics of materials. While there is already an excellent case for such an instrument based on incremental improvement from experiments at present beamlines, we would like to solicit input as to new science that might be done at such a facility.

   Possible directions for a new long-undulator beamline dedicated to inelastic x-ray scattering with meV resolution. Note that main focus is planned to be non-resonant measurements and the maximum scan range is expected to be ~ 2 eV.

Photo-excitation & Laser synchronization
“Coherent Phonons”
Non-Equilibrium (excited state) Dynamics
Photo-induced changes in biological molecules

Grazing Incidence Geometry
Samples are only available as thin films.
Depth Selectivity, ~ nm, Probable
Liquid Surfaces?

Field-Induced Phase Transitions
(IXS in the presence of strong fields)
Magnetically Induced Phase Transitions
(Magnetic field induced pair breaking).
Electric field induced freezing of nano-water

Electronic scattering
Sensitivity should be better than 0.1 e/cell/meV
Scan range out to ~ 2 eV

Phonon Microscopy
1 μm transverse beam size is straightforward.
100 nm possible?: “Phonon Nanoprobe”

Workshop Organization: A. Baron, M. Takata and J. Mizuki, Y. Sakurai, S. Tsutsui, T. Fukuda
Secretariat: K. Tohma, A. Inobe

If you would like to attend the workshop or the banquet (deadline is 2/6), please send e-mail to Ms. A. Inobe (ainobe@spring8.or.jp)

If you might like to present some idea for the new beamline, please contact A. Baron (baron@spring8.or.jp)

List of Speakers

Matteo d'Astuto (Universite Pierre et Marie Curie, France)
"Phonon anomalies in superconductors studied by IXS at ESRF"

Hiroshi Uchiyama (Ryukoku University, Japan)
"Phonon softening in HgBa₂CuO₄ from inelastic x-ray scattering"

Tatsuo Fukuda (Japan Atomic Energy Agency, Japan)
"Softening in the bond-stretching phonon mode of LSCO and YBCO"

Kazuyoshi Yamada (Tohoku University, Japan)
"Lattice dynamics of electron-doped high-Tc cuprate"

Markus Hücker (Brookhaven National Laboratory, U.S.A.)
"Unidirectional Order and 3D Stacking of Charge Stripes in Orthorhombic Nickelates"

Masatoshi Arai (Japan Proton Accelerator Research Complex, Japan)
"Cooperation and competition between IXS and INS in the future"

Jun Akimitsu (Aoyama-Gakuin University, Japan)
"Searching for exotic materials-New physics through innovative materials"

Naoya Tajima (RIKEN Wako Institute, Japan)
"Electronic Phases in an Organic Conductor: α-(BEDT-TTF)₂I₃"

Masanori Inui (Hiroshima University, Japan)
"Liquid Measurements: Introduction & Challenges"

Yasuo Endoh (International Institute for Advanced Studies, Japan)
"Decisive IXS measurement searching the multiferroic mechanism"

Yong Cai (National Synchrotron Radiation Research Center, Taiwan)
"eV Excitation in MgB₂"

Yukinobu Kawakita (Kyushu University, Japan)
"Application of IXS to surface and interfacial phenomena in liquids"

Junichiro Mizuki (Japan Atomic Energy Agency, Japan)
"Epsilon (Q,ω)"

Shinya Hosokawa (Hiroshima Institute of Technology, Japan)
"A Thin Film Application"

Dmitry Reznik (Institut für Festkörperphysik, Germany)
"Dynamic Charge Order in the Cuprates"

Takao Sasagawa (The University of Tokyo, Japan)
"Phonon anomalies in some La₂CuO₄-based compounds -relation to charge-ordering and superconductivity"

Moritz Hoesch (Japan Atomic Energy Agency, Japan)
"Phonon Softening in Superconducting Diamond"

Rolf Heid (Institut für Festkörperphysik, Germany)
"Lattice dynamics of high-Tc materials from first principles"

Alfred Baron (Japan Synchrotron Radiation Research Institute, Japan)
"Calculation vs expt & c-axis modes in YBCO"

Satoshi Tsutsui (Japan Synchrotron Radiation Research Institute, Japan)
"Inelastic x-ray scattering of Sm-based filled-skutterudite compounds"

Yoshikazu Tanaka (RIKEN Harima Institute, Japan)
"Phonon spectra of quasi-one-dimensional material BaVS₃"