Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 46: Superconductivity: Fe-based Superconductors - FeSe
TT 46.5: Vortrag
Mittwoch, 9. März 2016, 11:00–11:15, H19
Investigation of the electronic and magnetic structure of thin layer FeTe on Bi2Te3 — •Lasse Cornils1, Sujit Manna1, Anand Kamlapure1, Torben Hänke1, Jin Hu2, Zhiqiang Mao2, Bo Brummerstedt Iversen3, Philip Hofmann3, Jens Wiebe1, and Roland Wiesendanger1 — 1Department of Physics, University of Hamburg, Hamburg, Germany — 2Department of Physics, Tulane University, New Orleans, United States — 3Interdisciplinary Nanoscience Center iNANO, Aarhus University, Denmark
The surprising discovery of Fe based superconductors in 2008 lead to a big effort in finding new materials with very high critical temperatures. One good example are Fe-chalcogenides. Although the parent compound FeTe is not superconducting, the situation changes drastically on interfacing the material with other substrates. Recently He and coworkers [1] found zero resistance at the interface of Bi2Te3 films grown on bulk FeTe, which showed a transition temperature of 12K. In this talk we present our latest results on our investigation of the electronic and magnetic nature of epitaxially grown FeTe thin films on the topological insulator Bi2Te3 using spin-polarized scanning tunneling microscopy and spectroscopy. Up to several monolayers of FeTe, an antiferromagnetic structure similar to the one observed on its bulk compound FeTe was clearly visible. Surprisingly we found a gap around the Fermi level indicating proximity to superconductivity in coexistence with magnetism on the nanoscale.
Q.-L. He et al., Nature Comm. 5, 4247 (2014)