Proximity-Induced Magnetism in Topological Insulators

Datum

20.10.2015

Zeit

16:40 - 18:10

Sprecher

Dr. Flavio S. Nogueira

Zugehörigkeit

Institut für Theoretische Physik III, Ruhr-Universität Bochum

Serie

TUD Physikalisches Kolloquium

Sprache

en

Hauptthema

Physik

Andere Themen

Physik

Host

Prof. Dr. Sebastian Diehl, Fachrichtung Physik

Beschreibung

Topological insulators are characterized by symmetry-protected gapless boundary states. Particularly interesting are three-dimensional topological insulators, whose electromagnetic response features a topological magnetoelectric effect, which is closely related to the so-called chiral     anomaly in relativistic quantum field theories. In the context of solid state physics the chiral anomaly arises as a second-quantized version of the Berry phase induced by the electromagnetic response of   topological insulators. This property plays an important role in heterostructures involving both topological insulators and magnetic materials. In this talk we will consider theoretical and experimental aspects of bilayer and trilayer structures of the form FM/TI and FM/TI/FM (FM=Ferromagnet, TI=Topological Insulator) using a quantum-field theoretic approach. The paradigmatic experimental example to be discussed is one in which FM=EuS and TI=Bi2Se3.

References

1.        F. S. Nogueira and I. Eremin, Phys. Rev. Lett. 109, 237203 (2012).

2.        F. S. Nogueira and I. Eremin, Phys. Rev. B 88, 085126 (2013).

3.        F. S. Nogueira and I. Eremin, Phys. Rev. B 90,014431 (2014).

4.       F. Katmis, V. Lauter, F. S. Nogueira, B. Assaf, M. Jamer, P. Wei, B. Satpati,                 J. W. Freeland, I. Eremin, D. Heiman, P. Jarillo-Herrero, and J. S. Moodera, MIT preprint (2015).

Links

• http://tu-dresden.de/veranstaltungen/termin?id=TUD5615023e16a35

Letztmalig verändert: 20.10.2015, 09:53:59