Award Ceremony of the "Dissertation Prize of the Physical Society of Berlin"

The Dissertation Prize of the Physical Society of Berlin is awarded annually to honor the best physics dissertations completed at universities in Berlin and Brandenburg.  Dr. Florian Nikolas Brünig (AG Netz) from FU Berlin will be honored this year. This year's award ceremony will take place at the Freie Universität Berlin. We warmly invite all physicists from Berlin and Brandenburg universities to join this celebration.

Location: Former Library "BoB" (room No. 0.3.01; entrance "Trakt 3") Freie Universität Berlin Fachbereich Physik Arnimallee 14, 14195 Berlin The get-together will be held in the cafeteria (room 1.1.25).

23. Einstein Lecture Dahlem - Prof. Dr. Katrin Böhning-Gaese: "Biodiversity and People in the Anthropocene"

Helmholtz Centre for Environmental Research and Goethe University Frankfurt The lecture will be held in German without translation. The Anthropocene – otherwise known as the age of humans – has seen a dramatic acceleration in many socio-economic and ecological processes. One consequence of this is the loss of biodiversity. In her lecture, Katrin Böhning-Gaese will present research findings from Europe and Africa that lay bare the causes and consequences of biodiversity loss. This loss not only affects ecosystems, but also has serious consequences for human well-being and life as we know it.

Location: Henry Ford Building Freie Universität Berlin Garystr. 35 14195 Berlin

Orientation Weeks for New Master's Students of Physics

We warmly welcome all new physics students!

Confidential Consultation for Physics Students

Dr. Nicole Rudolph-Mohr, Officer for Studies and Teaching, offers physics students the opportunity for a confidential one-on-one conversation.

Location: Room 1.1.13 (No other persons will be present in the room during our conversation.)

Academic Graduation and Summer Party 2024

Graduates receive their degrees bachelor's, master's and PhD certificates in a festive atmosphere with musical accompaniment. It will be followed by a relaxed summer party in the garden of the Department of Physics.

Location: Academic graduation ceremony: large lecture hall Summer party: garden between the tract 1 and tract 2

Special Seminar: Prof. Shigemasa Suga - Photoelectron Momentum Microscopy and Soft X-ray Resonant Inelastic Scattering with spatial resolution down to sub-μm scale and prospect of their operand measurements

Osaka University High resolution spin- and angle-resolved photoelectron spectroscopy (SP-ARPES) in micro-nano regions is very widely demanded in order to clarify surface and bulk electronic structures of solids by tuning the excitation photon energies (hν). Spatial resolution is also beneficial for development of spintronics devices. However, extremely low spin detection efficiency has hindered its progress over decades until very recently. The development of a momentum microscope (M.M.) composed of a PEEM type input lens and an aberration corrected tandem S-type double hemispherical deflection analyzers (DHDAs) has opened a breakthrough. 2 dimentional (2D) momentum dependent E B (k x ,k y ) can be measured in a very wide k space with high energy and momentum resolutions better than 12 meV and 0.005 Å -1 . Nearly 10,000 (k x ,k y ) points can be simultaneously measured over a full surface/ bulk Brillouin zone (BZ) at the same time for a certain E K (or E B ). 2D imaging spin filter such as Au/Ir(001) can be installed behind this M.M. Then spin asymmetric 2D E B (k x ,k y ) images can be recorded at two electron incidence energies (10.25 & 11.5 eV) with opposite sign of spin sensitivity. From these two spectra, spin resolved spectrum in the wide k space is easily derived in the form of P s (E B (k x ,k y )). P s (E B (k x ,k y ,k z ) detection is very easy by changing hν. Since the PEEM can collect whole 2π steradian emitted photoelectrons, 2D multi-channel figure of merit of this spin detection is more than ∼million times or sometimes sub-billion times higher than the Mott detector and spin-LEED detector and even ∼10,000 times higher than the most advanced Fe-O VLEED spin detector. Examples of SP-ARPES measurements of surface Rashba states as well as Dirac cone states of topological insulators by 2D spin filter will be presented. Photoelectron spectroscopy is only useful to conductive materials. In the case of insulating materials, the charging up effects spoils the ARPES, though the details knowledge of their electronic structures are as well demanded quite often. In such a case, photon-in and photon-out experiment as RIXS is ideal, although the micronano study requires the focusing of the excitation synchrotron radiation. The advantage of RIXS is the possibility to be measured under any external perturbations. I will show an example of a study of half metal Heusler alloy under an external magnetic field. Abstract

Location: Lecure Hall A (1.3.14) Department of Physics Arnimallee 14 14195 Berlin

Karl Scheel Prize 2024

The Physical Society of Berlin (Physikalische Gesellschaft zu Berlin) invites you to this year's Karl Scheel Meeting, at which the physicists Dr. Tom Seifert (Freie Universität Berlin) and Dr. Gustav Mogull (Humboldt-Universität zu Berlin) will be awarded the Karl Scheel Prize 2024. he prize winners will present details about their research in talks. The laudatory speeches will be held by Prof. Dr. Tobias Kampfrath (FU Berlin) and Prof. Dr. Jan Plefka (HU Berlin). The award ceremony will take place in the Magnus-Haus in Berlin's Mitte district and will be accompanied by a musical program as well as food and drinks.

Location: Magnus-Haus Am Kupfergraben 7 10117 Berlin

BESR Conference

The BESR Conference aims to bring together young researchers from the diverse space-science working groups, in and around Berlin.

Location: Freie Universität Berlin SupraFAB Altensteinstr. 23a Room 201 14195 Berlin

Information Evening for Physics Students Interested in Studying Abroad - International Week XXL

Abroad and Back We provide information to physics students about exchange programs and various opportunities to study or intern abroad.

Location: Cafeteria (Room 1.1.25)

Special Seminar: Walid G. Malaeb - Photoemission spectroscopy studies on high-Tc superconductors and topological materials

Department of Natural Sciences, Lebanese American University Photoemission Spectroscopy (PES) is a powerful technique in directly probing the electronic structure of solids especially in its angle-resolved mode (ARPES). For this purpose, synchrotron radiation as well as high-resolution lasers and other light sources have been used. In this talk, I will present how we have been implementing this technique to uncover various aspects of the electronic structure of quantum materials, in particular the iron-pnictide high-Tc superconductors from the early stage since their discovery in Japan in 2008. The discussion will include the core energy levels, the three-dimensional electronic structure, the Fermi surfaces and superconducting gaps, the coupling to bosonic modes, etc. I will also present our recent work on alpha-Sn which has recently gained much attention due to the diverse tunable topological phases it can reveal ranging from a topological insulator (TI) to a topological Dirac semimetal (TDS) depending on the applied strain in addition to its simple elemental structure, non-toxic nature and great potential for applications. Finally, I will make a brief overview on the recent research projects we have launched at LAU. Abstract

Location: Lecture Hall A (1.3.14) Department of Physics Arnimallee 14 14195 Berlin

Workshop "From Mathematical Foundations to Quantum Technologies"

A central objective of the workshop is to promote an exchange between mathematicians, physicists and engineers across disciplines on the subject of optimal control of quantum systems. The workshop is co-organized by the quantum physicist Prof. Dr. Christiane Koch from Freie Universität Berlin.

Location: Zuse Institute Berlin Takustraße 7 Lecture Hall D-14195 Berlin

Advanced Lecture Series - 4 Lectures by Prof Ronnie Kosloff

This advanced lecture series is part of the Thematic Einstein Semester “Mathematics for Quantum Technologies” (Summer 2024).

Location: Zuse Institutr Berlin (ZIB) Lecture Hall Takustraße 7 D-14195 Berlin

EPS Forum 2024

A unique opportunity for exchanges between young researchers, world-renowned physicists and industrial leaders

Location: Freie Universität Berlin Henry Ford Building Garystraße 35 14195 Berlin-Dahlem