Dresden 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 1: Topological Insulators 1 (joint session TT/HL)

TT 1.9: Vortrag

Montag, 16. März 2020, 11:45–12:00, HSZ 03

MBE-grown Sb2Te3/Bi2Te3 heterostructures - Tuning of the topological surface statesVanda M. Pereira, Chi-Nan Wu, Liu Hao Tjeng, and •Simone G. Altendorf — Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

Topological insulators (TIs) are bulk insulators with the bulk band gap only intersected by conducting, Dirac-cone like surface states that are topologically protected. For many materials, the Dirac point of these surface states lays buried in the bulk bands which hinders an experimental observation of the various theoretically predicted topological quantum effects, like the quantum anomalous Hall effect.

In our study, we combine two TIs, namely Sb2Te3 and Bi2Te3, in a heterostructure which allows for a tuning of the position of the Dirac point to the Fermi level by varying the layer thicknesses. Using the optimized layer structure, we investigate the changes of the TI properties when interfaced with a magnetic substrate. We will present a characterization of the MBE-grown Sb2Te3/Bi2Te3 heterostructures on non-magnetic and magnetic substrates by RHEED, XPS, ARPES, XMCD, and transport measurements.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2020 > Dresden