Russian-German Workshop 2019

Inauguration of the Undulator Beamline of the Russian-German Laboratory at BESSY II
Accompanied by a workshop on Spin-resolved Photoemission and Electronic Structure of Quantum and Energy Materials

On 28 Oct 2019, in the morning we will inaugurate the new RGBL2 undulator beamline with permanent end station for spin- and angle-resolved photoemission. The instrument is accessible for Russian-German collaborations as well as general users of BESSY II.

Subsequently, we will highlight the scientific opportunities with a workshop on "Spin-resolved photoemission and electronic structure of quantum and energy materials”. The workshop will start around noon on 28 Oct and end with a dinner and poster session on 29 Oct.

Scope of the workshop

In the research of materials with novel properties, the electron spin has gained an increasingly more important role – both in its manifestation as (i) spin-orbit interaction and (ii) exchange interaction. While in the past the spin-orbit interaction had mainly been considered a correction to the electronic properties of materials, it has now a central role in solid state properties. Examples are the various renderings of the Rashba effect at surfaces, interfaces and in the bulk, topological insulators and 2D Dirac and Weyl semimetals, as well as the 2D transition metal dichalcogenides such as MoS2 and WTe2. On the other hand, the exchange interaction is responsible for ferro- as well as ferri- and antiferromagnetism. Also in this field enormous breakthroughs have recently been achieved, for example the finding of high-temperature monolayer ferromagnets CrI3 and VSe2 in the past two years.

To investigate the electronic properties of these materials, it is essential to resolve the electron spin. Angle-resolved photoemission with synchrotron radiation is the most powerful method to investigate the occupied electronic structure. Only few groups in the world are using the spin-resolved version of angle-resolved photoemission and it is important to bring this community together. Some groups are developing angle-resolved photoemission further, for example in the direction of sub-micrometer spacial resolution and 100 to 10 fs time resolution. The invited speakers shall share their advance in the experimental methods and their use as well as the state of the art in novel materials. To connect to fields in solid state spectroscopy where potentially the method can be applied but is not yet prominently used, also scientists from related field shall be invited. One of the topics of common interest in applied and basic research is graphene.

In summary, the scientific aims are:

- overview of the state of the art in angle-resolved photoemission and spin-resolved photoemission
- further developments in spacial and temporal resolution
- application of spin-resolved ARPES to topological materials,
- application of spin-resolved ARPES to graphene and related 2D materials
- application of spin-resolved ARPES to strongly correlated electronic systems
- application of ARPES to energy materials research

Please note that there is a participation fee of EUR 100,- from which invited speakers and students are exempted. Registration deadline: 8 Sep 2019.