Spin-Valley physics based on two-dimensional crystals

Two-dimensional crystals are atomically thin, layered materials that have strong bonding in one crystal plane, but whose neighbouring atomic planes are stacked and held together by much weaker van-der-Waals forces. Due to the reduced dimensionality, charge carriers in these materials are strongly confined to several nanometres. This leads to changes of the electronic band structure and optical behaviour giving rise to exciting and yet unexplored physical effects. The most investigated crystal of this type is graphene which has been shown to exhibit outstanding electronic properties. While structurally being similar to graphene, transition metal dichalcogenides such as MoS2, MoSe2 or WSe2 exhibit a direct bandgap in the monolayer limit which allows for optical access to spin-valley polarization. Currently, we investigate the possibility to tune quantum properties of two dimensional crystals and heterostructures using field effective devices.

 

Group members working on these topics:

Jakob Wierzbowski, Malte Kremser, Janine Gückelhorn, Kai Müller, Jonathan Finley

 

Collaborations

  • Alexander Tartakovskii, The University of Sheffield, UK

 

Funding:

We gratefully acknowledge funding from the Nanosystems Initiative Munich (NIM) and the PhD program ExQM of the Elite Network of Bavaria.

TUM Technische Universität München TUM Technische Universität München Physik Department Elektrotechnik und Informationstechnik TUM Technische Universität München
 

Events & News

17 Jan 2018

ERC Consolidator Grant for Gregor Koblmüller   more

16 Jan 2018

Light-steering of spin-polarized currents in topological insulators   more

10 Aug 2017

Best Poster Awards for Ganpath Veerabathran and Alexander Andrejew at iNOW 2017   more

27 Jun 2017

Best Poster Award at Nanowire Week for Jochen Bissinger   more

15 Mar 2017

Dr. Kai Müller admitted to the “Junges Kolleg” of the Bavarian Academy of Sciences   more

Seminars

March 12, 2018

Two-dimensional coherent spectroscopy of a semiconductor microcavity   more

March 05, 2018

Diamond-organic photovoltaics   more