[10p-N204-1~17] 6.5 Surface Physics, Vacuum

[10p-N204-14] Detecting photoelectrons from spontaneously formed excitons

〇Keisuke Fukutani^1,2, Roland Stania^1,2, Changil Kwon^1,3, Jun Sung Kim^1,3, Ki Jeong Kong¹, Jeayoung Kim^1,2, Han Woong Yeom^1,3 (1.Inst. for Basic Science, 2.Pohang Accelerator Lab, 3.Dept. of Physics, POSTECH)

Keywords:Exciton, Excitonic insulator, Angle-resolved photoemission spectroscopy

In the present study, we have performed angle-resolved photoemission spectroscopy to investigate the electronic and quasi-particle structure of Ta2NiSe5. The nature of the phase transition observed at 327K for this compound is under extensive debate and the elucidation of the quasi-particles in this material is of paramount importance.
In this talk, we will present on the detection of excitons