Trivial Surface Conductivity in Samarium Hexaboride

Datum

24.09.2015

Zeit

15:00 - 16:00

Sprecher

Dr. Emile Rienks

Zugehörigkeit

Institut für Festkörperphysik, TU Dresden und IFW

Sprache

en

Hauptthema

Materialien

Andere Themen

Materialien, Physik

Host

Christine Malbrich

Beschreibung

Abstract SmB6 has recently returned to the limelight as the prime candidate for a topological Kondo insulator [1]: The first example of a system at the intersection of topological insulators and materials with strong electron correlation. Contradicting a growing consensus in the literature [2,3], we demonstrate by means of angle-resolved photoemission measurements that the experimentally observed surface states of SmB6 are of conventional, topologically trivial nature [4]. The relevance of this result is twofold: It helps resolve the long-standing discussion about the poorly understood low temperature properties of SmB6. In addition, it provides an essential result for the discussion whether topological insulators can have strong electron correlation. [1] Dzero, M., Sun, K., Galitski, V., Coleman, P. Phys. Rev. Lett. 104, 106408 (2010) [2] Kim, D.-J., Xia, J. & Fisk, Z. Nat. Mater. 13, 466–470 (2014) [3] Xu, N. et al. Nat. Commun. 5, 4566 (2014) [4] Hlawenka, P. et al. arXiv 1502.01542

Links

• Seminars at the IFW

Letztmalig verändert: 24.09.2015, 09:51:37