News and posts

Elastic Tuning and Response of Electronic Order

New physical phenomena have emerged from a particularly strong coupling between a materials’ elasticity and its symmetry-broken electronic quantum phases. Examples are reversible superelasticity with large recoverable strain in iron-based materials, strong nonlinear elastic response with violation of Hooke’s law and critical elasticity in pressurized organic charge-transfer salts, a doubling of the superconducting transition temperature in strained strontium ruthenate, strain-induced charge order in cuprate superconductors, as well as nematicity in iron-based superconductors. Static and dynamic strain manipulation has emerged as a new knob to tune and shape a material’s electronic properties.

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

Novel Electronic and Magnetic Phases in Correlated Spin-Orbit Coupled Oxides

The interplay between spin, orbit and electron correlation has emerged as a new paradigm in contemporary condensed matter physics and represents a rich playground for the realization of novel quantum state of matters with exotic electronic and magnetic properties including Dirac-Mott insulators, Lifshitz/Slater phases, Multipolar and Kitaev model magnetism, unconventional superconductivity and topological physics.

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

Molecular Electro-Opto-Spintronics

Molecular electronics originally promised miniaturization of molecular devices using Nature’s smallest building blocks to allow for novel electronic function by simply altering the chemical structure of the molecular component. Molecular electronics has evolved towards a complementary technology to silicon-based electronics, providing functionalities not possible with classical electronic devices. After more than 40 years of experiments, it remains a challenge to rationally design molecule-electrode junctions due the complex interplay between electronic structure and the chemical/supramolecular arrangement of the interfaces. Unlike traditional CMOS electronics, comprehensive design rules for molecular junctions are not available yet. Only bits and pieces have been published scattered across disciplines, including interface engineering, supramolecular chemistry, surface science, computational science, physics, chemistry, optics, biology and micro/nanofabrication.

Antiferromagnetic Spintronics: from topology to neuromorphic computing

The new field of antiferromagnetic spintronics focuses on making antiferromagnets active elements of spintronic devices. The higher complexity of the ordered phase and parameter space in antiferromagnets have given rise to new avenues of basic research that range from topological quasiparticle dynamic manipulation, multipole order effects, ultra-fast dynamics, and even applications towards neuromorphic computing and IoT.

The new field is of interest to the strongly correlated effects community and the community focused on topological matter. It has connected to the current ferromagnetic spintronics research by creating entirely new ways of rethinking spin phenomena in antiferromagnets, while benefiting from the pioneering works in antiferromagnetic materials.

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

YRLGW: Topomagnetism Is Coming: Relativity and Correlations in Topological Magnets

Remarkable advances in strongly correlated and relativistic condensed matter physics have been made over the past decade by these largely non-interacting communities. Interestingly, their attention recently focused on the same grand challenges such as room-temperature quantum chiral edge modes, topological superconductivity, or topological computation.

The research of nonmagnetic materials culminated in predicting that approximately one third of them exhibit topological electronic structure. In contrast, the investigation of topological magnets is progressing at much slower pace albeit time-reversal symmetry broken topological phases demand magnetic order. For a long time, low-dimensional topological systems were anticipated to be naturally incompatible with robust magnetism. However, recent theoretical and experimental efforts have revealed low-dimensional as well as 3D topological insulators and Weyl semimetal magnets. The relativistic phenomena, e.g. the spin Hall, quantum spin Hall, or magnetic spin-Hall effect, were originally predicted within the single-particle picture. However, realistic predictions of magnetic materials, requires inclusion of the electronic correlations. Conversely, the correct description of strongly correlated magnets with high atomic numbers needs to include spin-orbit coupling phenomena.