Berlin 2018 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 56: New materials and concepts
HL 56.5: Vortrag
Freitag, 16. März 2018, 12:15–12:30, EW 202
Scanning tunneling microscopy study of an excitonic insulator candidate — •Xinglu Que1,2, Lihui Zhou1, Qingyu He1,2, Tomohiro Takayama1,2, Andreas Rost1,2, and Hidenori Takagi1,2 — 1Max Planck Institute for Solid State Research, Stuttgart, Germany — 2Institute for Functional Matter and Quantum Technologies, University of Stuttgart, Germany
An excitonic insulator is resulted from strong electron-hole coupling as compared to the single electron energy gap of a semiconductor or semimetal, where new exotic electronic phases have theoretically been predicted to emerge. I present our study of an excitonic insulator candidate by scanning tunneling microscopy. The surface topography as well as the electronic structure was investigated at different temperatures in ultrahigh vacuum. Our atomic resolution studies revealed a strong correlation of its electronic properties with the structure, laying the ground out for further study on physics of excitonic insulators.