Research Themes

Quantum materials exhibit a wide variety of exotic phenomena. Strong electron-electron interaction and coupling among charge, spin, orbital, and lattice degrees of freedom are the main cause of such novel phenomena. We study physical properties of various quantum materials by using infrared/optical spectroscopy techniques.

Main topics of our recent researches include but not limited to

•  Strongly correlated electrons

• Metal-insulator transition 

• Spin/charge/orbital interactions 

• Charge/spin density waves

• High-Tc superconductivity

Instruments

We employ optical spectroscopy techniques to study exotic physical phenomena of quantum materials. We measure optical response in a wide energy range from 5 meV to 5 eV by using Fourier-transform infrared spectrometer and spectroscopic ellispometer.  This allows us to study various physical phenomena with different energy scales in quantum materials, as illustrated in the figure below [D. N. Basov et al., Rev. Mod. Phys. 83, 471 (2011)].