Proximity-Induced Magnetism in Topological Insulators

Date

Oct 20, 2015

Time

4:40 PM - 6:10 PM

Speaker

Dr. Flavio S. Nogueira

Affiliation

Institut für Theoretische Physik III, Ruhr-Universität Bochum

Series

TUD Physikalisches Kolloquium

Language

en

Main Topic

Physik

Other Topics

Physik

Host

Prof. Dr. Sebastian Diehl, Fachrichtung Physik

Description

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

Last modified: Oct 20, 2015, 9:53:59 AM