Facilities

Angle-Resolved Photoemission Spectroscopy

 Our research laboratory is at the forefront of Angle-Resolved Photoemission Spectroscopy (ARPES) experiment, offering wide array of light sources and advanced equipment to conduct high-level investigations into the electronic structure of materials.

 ARPES is a powerful experimental technique used in condensed matter physics  to study the electronic structure of materials (especially crystalline solids). It provides information about the energy and momentum of electrons in a material, offering valuable insights into its electronic properties. 

 The basic principle behind ARPES is a photoelectric effect, which is the emission of electrons when electromagnetic radiation hits a materials. The emitted electrons, known as photoelectrons, have information about their energy and momentum. The angle of emission and the kinetic energy of the photoelectrons are measured by spectrometer. By comparing these values with those of the incident photons, detailed picture of the electronic states of the material can be obtained. 

 The light source has a crucial role in ARPES experiment. By varying the light source, we can achieve high energy and momentum resolution, and can probe specific electronic states depending on energy or polarization. In our research laboratory, optimal experiments can be performed with various light sources including synchrotron light source, LASER, and discharge lamp.

Scanning Tunneling Microscopy / Spectroscopy

 Our research laboratory with our Scanning Tunneling Microscopy (STM) equipments,  

STM enables direct imaging of various material surfaces in atomic scale. The STM topography provides both atomic and electronic information on the surface states with a sub-nano scale.