Condensed Matter Experiment Ⅰ
Condensed Spin Matter Group
|Professor :||Masaki Fujita|
|Associate Professor :||Yusuke Nambu|
|Assistant Professor :||Yoichi Ikeda|
In strongly correlated electron systems, new phenomena can appear due to a complex combination of degree of freedom of the electron (charge, spin and orbital). To understand the mechanism, for instance, high Tc superconductivity, low dimensional quantum spin phenomena, electronic charge segregation and so on, it is quite important to obtain the information of not only basic structure but also the dynamics of materials with strong electron correlations.
Our main experimental method is neutron scattering, one of the most powerful and direct microscopic methods for spin systems. Neutron scattering can be applicable to study not only spatial spin arrangement but also time and space correlations of dynamical spin fluctuation. Thus the results of detailed neutron scattering experiments on high quality samples provide us an opportunity to revisit the microscopic origin of magnetism. Especially, we focus on a research of high-transition-temperature (high-Tc) superconductivity and study the spin excitations and phonons in several high-Tc superconductors. For the measurement, we also grow necessary high quality single crystals in our laboratory.
For our investigation, we have installed and maintained two neutron diffractometer and spectrometer at Japan Atomic Energy Agency, Tokai. We also perform neutron scattering experiments in collaboration with scientists all over the world: USA, France, UK, Germany etc..