Spin textures: Magnetism meets Plasmonics

Spin textures in solids originate from the complex interaction between electrons and atoms. In particular, the collective behavior of electrons is often key to emergent physical properties. For example, the spins of localized as well as itinerant electrons can interact to realize statically (meta-) stable magnetic spin textures, including spin-spirals, vortices, skyrmions, multi-q structures, i.e., magnetic arrangements characterized by multiple wave vectors in their magnetic order parameter.
Alternatively, electrons can be excited collectively by electromagnetic waves such that the electrons oscillate to realize plasmons. Being highly endowed with tunability, the field of plasmonics, has rapidly emulated several interesting spin structures.
In both fields, skyrmions and topological excitations play a crucial role spurred by the idea of robust states of matter for applications including storage and information technology. While there are a lot of similarities between magnetic and electromagnetic spin textures there are also key differences in their physics. For example, each field has its individual challenges to realize tailored spin textures: While a limitation in magnetism is that certain competing interactions are required to realize spin structures, in plasmonics certain field components are prohibited hindering the formation of arbitrary spin structures. External stimuli are interesting for both research fields to manipulate the unique magnetic and electronic properties of the excitations.
This workshop aims to bring together experts from both magnetism and plasmonics to foster the discovery of new spin textures.

For videos of the talks and further information, please visit the workshop home page.

Young Research Leaders Group Workshop: Correlation and Topology in magnetic materials

The mathematical concept of “topology”, developed in the past century, has become the real game changer in condensed matter physics. The particular coupling of the electronic wavefunctions with the spin configuration define the material topology, from which unique electronic properties arise. Skyrmions, anomalous spin Hall effect or topological superconductivity are some examples of the fascinating phenomena and applications that this new concept enables.
Besides the potential technological transfer, topology also paves the way for quantum states, a phenomenal playground for investigating fundamental interactions of correlated electrons under topological protection. On top of these correlated materials, topological superconductivity, essential to the realization of quantum computing, is one of the most “hot research lines”, expected to generate the biggest revolution in the field.
By gathering young researchers from both topology and correlation topics, we aim to get a broad perspective of one of the hottest topics in condensed matter physics. The workshop will count on researchers from both experimental and theoretical fields, aiming to promote collaborations across different perspectives.

For videos of the talks and further information, please visit the workshop home page.

Workshop-School on Quantum Spinoptics

This joint workshop and school aims to bring together students and researchers in the separate fields of solid-state physics and quantum optics, with the goal of fostering an exchange of ideas and knowledge that might spawn a new exciting field of “Quantum Spinoptics.” The common ground for this inter-disciplinary field is the increasingly recognized importance to develop techniques to controllably couple qubits (either atoms or solid-state spins) to interesting quantum “baths” (photons or magnetic materials). Such control is expected to open up diverse scientific and technological opportunities, such as:
- Long-distance coupling and entanglement of qubits through coherent interactions or correlated dissipation
- State protection through correlated dissipation (e.g., subradiance) and associated applications
- Quantum sensing and metrology, and novel probes of condensed matter systems
- Realization of novel classes of out-of-equilibrium dynamics and phases
While these ideas are already starting to be explored separately within solid-state physics and quantum optics, we envision that scientific progress and opportunities will significantly accelerate with the cross-fertilization of ideas. The joint workshop-school format is intended to provide a venue equally devoted to the dissemination of latest research developments, discussion of scientific ideas, and providing a pedagogical background to establish a common “scientific language” for this new field. To that end, the event will feature two extended introductory lectures, featuring scientific and pedagogical leaders within the fields of solid-state physics and quantum optics. We thus especially encourage young scholars to attend and to also contribute in a dedicated poster session.

For videos of the talks and further information, please visit the workshop home page.

Quantum Matter for Quantum Technologies

Quantum materials hold the key to unlocking the next frontier of quantum advancements, and at the forefront of this transformation are innovative Josephson junction concepts designed to harness the inherent properties of these quantum materials. This includes pioneering approaches such as integrating Josephson junctions into 2D materials, exploring the intriguing realm of twisted bilayers, devising semiconductor-based superconducting qubits, understanding novel phenomena in chiral and nodal superconductors, just to name a few. Within this diverse landscape, these developments bring forth a wealth of advanced functionalities, including the ability to fine-tune quantum systems through electric gate control, compatibility with magnetic fields, and the exploration of unconventional Josephson potentials.

In this workshop, our vision is to nurture collaborative synergy among diverse scientific communities that have been somewhat disconnected. This collaborative effort aims to foster innovation and deepen our comprehension of various facets leading to novel qubit concepts based on exotic Josephson potentials, novel properties of Josephson quantum matter and the exploration of topological effects. Additionally, we aspire to delve into recent proposals that revolve around unconventional superconductivity. Our shared goal is to establish a new technological paradigm within the realm of quantum technologies, pushing the boundaries of what is currently achievable with standard superconducting circuits and unlocking the full potential of quantum materials and Josephson junctions.

For videos of the talks and further information, please visit the workshop home page.

Hybrid Correlated States and Dynamics in Quantum Materials

Correlated states of electrons give rise to quantum matter, such as ordered magnets, spin liquids, superconductors, and topological materials. In lower dimensions, correlations assume a still pronounced importance. The exciting phenomena hosted and technological applications promised by these states of matter have further inspired the scientific community to engineer hybrids where different ingredients for correlations are provided by separate materials coupled together. Thus, such low-dimensional hybrid nanostructures have enabled engineering novel states of matter with intriguing physics, often not admitted by any single platform.

The workshop shall bring together experts and young researchers from three different communities: (i) Magnetism and Spintronics, (ii) Superconductivity and Strongly Correlated Electrons, and (iii) Low-dimensional nanostructures. The purview includes coherent and incoherent magnetization dynamics in conjunction with the various spintronics effects that allow its manipulation and detection. A key topic will be the recently discovered nonreciprocal effects in magnets e.g., chiral magnons, as well as superconductors, e.g., the superconducting diode effect.

Recent discoveries regarding two-dimensional materials, multi-orbital superconductivity, Ising superconductors, topological superconductivity and quantum sensors coupled to magnets will also be central to the workshop portfolio. Employing fluctuations of currents (e.g, flow of spin or vortices) to probe the quantum nature of transport will form an exciting topic of discussion across communities. Finally, the case of spin fluctuations mediated superconductivity, that is believed to underlie a wide range of unconventional superconductors can best be discussed with the three communities present at the workshop.

For videos of the talks and further information, please visit the workshop home page.

Nanomagnetism in 3D

The scientific and technological exploration of three-dimensional magnetic nanostructures is an emerging research field with exciting novel physical phenomena, originating from the increased complexity in spin textures, topology, and frustration in three dimensions. Tailored three-dimensional nanomagnetic structures, including in artificial spin ice systems or magnonics will enable novel applications in magnetic sensor and information processing technologies with improved energy efficiency, processing speed, functionalities, and miniaturization of future spintronic devices. Another approach to explore and harness the full three-dimensional space is to use curvature as a design parameter, where the local curvature impacts physical properties across multiple length scales, ranging from the macroscopic to the nanoscale at interfaces and inhomogeneities in materials with structural, chemical, electronic, and magnetic short-range order.

In quantum materials, where correlations, entanglement, and topology dominate, the local curvature opens the path to novel phenomena that have recently emerged and could have a dramatic impact on future fundamental and applied studies of materials. Particularly, magnetic systems hosting non-collinear and topological states and 3D magnetic nanostructures strongly benefit from treating curvature as a new design parameter to explore prospective applications in the magnetic field and stress sensing, micro-robotics, and information processing and storage.
Exploring 3d nanomagnetism requires advances in modelling/theory, synthesis/fabrication, and state-of-the-art nanoscale characterization techniques to understand, realize and control the properties, behavior, and functionalities of these novel magnetic nanostructures.

For videos of the talks and further information, please visit the workshop home page.