Condensed Matter Experiment Ⅰ
Photoemission Solid-State Physics
|Professor :||Takafumi Sato||Takashi Takahashi|
|Associate Professor :||Seigo Soma||Katsuaki Sugawara|
|Assistant Professor :||Kosuke Nakayama|
We study the electronic structure of strongly correlated electron materials such as high-temperature superconductors with ultrahigh-resolution angle-resolved photoemission spectroscopy (ARPES). ARPES is a unique and powerful experimental technique to directly observe the momentum-resolved electronic structure. We have constructed an ultrahigh-resolution ARPES spectrometer in our laboratory and the present energy resolution is in the world-best level.
- (1) The electronic states of graphane (single-layer graphite) and graphite intercalation compounds, in particular, Dirac-fermion-like behavior in graphene.
- (2) The electronic structure and mechanism of copper-oxide and iron-based high-temperature superconductors, in particular, the “”quasiparticle”” relevant to the origin of superconductivity.
- (3) Construction and improvement of a spin-resolved ultrahigh-resolution photoemission spectrometer and electronic states of spintronics-related materials such as topological insulators.
- (4) Peculiar electronic states at the interface/surface of oxides and semimetals.
- (5) The charge-density wave (CDW), superconductivity, and spin-charge separation in metallic quantum wires and ultrathin films.