The temperature dependence of the electronic structure of a tetragonal FeSe1-xSx

Iron-based superconductors are unconventional superconductors characterized by a rich phase diagram. In this presentation, I will show a detailed Angle-Resolved Photoemission Spectroscopy (ARPES) study on the electronic structure of tetragonal FeSe1-xSx with a sulfur substitution of x = 0.21. The tetragonal FeSe1-xSx is a multiband system with two electron bands crossing Fermi level at the Brillouin zone corner and two hole bands at the Brillouin zone center and is considered to be a compensated semi-metal. My investigation explores the evolution of band structure across a temperature range from 4K to 300K. As the temperature increases, the electrons pockets grow in size while the hole pockets shrink, which is consistent with an increase of chemical potential.

If you would like to meet with Zeyu during her visit, please contact Susan LaMoreaux.