Technology and investigations of topological crystalline insulators (A05)

• Subject Area: Experimental Condensed Matter Physics
• Term: from 2015 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 258499086

The MBE of (Pb,Sn)(Te,Se) TCI layers will be continued and focused on quaternary compounds, thin multilayers structures and magnetic doping. The MBE parameters, counterdoping and pn-heteroepitaxy will be optimized for reaching insulating or n-doped bulk properties. The crystalline symmetry protecting the 4 TCI surface states will be controlled by surface orientation, thickness and lattice strain of the layers. The structural symmetry, structural defects, magnetism, as well as their impact on TCI surface states of the structures will be studied by XRD, EDX, TEM, SQUID, ARPES, STM, STS, and magnetotransport measurements.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1170: Topological and Correlated Electronics at Surfaces and Interfaces ("ToCoTronics")
• Applicant Institution: Julius-Maximilians-Universität Würzburg
• Project Head: Professor Dr. Karl Brunner