News

26.01.2023 Upcoming SPICE workshop on Altermagnetism in May

The SPICE workshop "Altermagnetism: Emerging Opportunities in a New Magnetic Phase" will be held from June 13th to 15th, 2023 at the historic WASEM winery, Ingelheim.

The workshop focuses on the emerging magnetic material class of altermagnets, that show compensated magnetic ordering and alternating spin-polarization in both the direct and momentum space, with a d-wave (or higher even-parity wave) symmetry. The novel properties of altermagnets have links to many fields of research, such as spintronics, ultra-fast photo-magnetism, neuromorphics, multiferroics, magnonics, topological matter, or superconductivity. The workshop brings together junior and senior scientists from diverse research fields to explore this fascinating newly discovered magnetic phase.

You can apply online for the workshop until April 1st, 2023.

20.01.2023 Joint Publication about the Spontaneous Anomalous Hall Effect

A joint publication with Jairo Sinova and Libor Šmejkal about the spontaneous anomalous Hall effect in a magnetic semicoductor has been published in Physical Review Letters.

They observe a spontaneoeus anomalous Hall signal without external magnetic fields in the semiconductor MnTe. The anomalous Hall effect arises from an unconventional phase with strong time-reversal symmetry breaking and alternating spin polarization in real-space crystal structure and momentum-space electronic structure.

You can find the publication under PhysRevLett.130.036702

09.01.2023 Upcoming SPICE workshop on Non-equilibrium Quantum Materials Design in June

The SPICE workshop "Non-equilibrium Quantum Materials Design" will be held from June 27th to 29th, 2023 at the historic WASEM winery, Ingelheim.

The goal of the workshop is to bring together experts in quantum materials synthesis with experimentalists and theorists investigating non-equilibrium phenomena to spark a new generation of “non-equilibrium quantum materials design.” This nascent research opportunity builds off of recent discoveries of unique phases and functionalities of quantum matter when driven out-of-equilibrium by optical or electrical stimuli. We hope the workshop will allow us to define short- and long-term goals in the field, and ultimately, establish a community working towards the creation of quantum materials with tailored non-equilibrium responses.

You can apply online for the workshop until April 1st, 2023.

21.12.2022 Joint Publication about Magnetoelastic Antiferromagnets

A joint publication with Helen Gomonay about  domains the canted antiferromagnet hematite has been published in Physical Review B.

They study the domain structure of hematite and the influence of destressing fields on the magnetic domain structure. They find fluctuating destressing fields throughout the sample which leads to locally varying effective anisotropies. This effect strongly distinguishes such canted antiferromagnets from collinear ones and gives a foundation for further studies.

You can find the publication under PhysRevB.106.224419.

08.12.2022 Publication about Altermagnetism

A publication of Jairo Sinova, Libor Šmejkal and Thomas Jungwirth about altermagnetism, a new nonrelativistic magnetic phase has been published in Physical Review X.

A few month ago a new magnetic phase (altermagnetism) has been proposed. Altermagnets have zero net magnetization (like antiferromagnets) yet spin split electronic bands (like ferromagnets). This paper describes the theoretic framework and orders recent research in the emerging field.

You can find the publication under PhysRevX.12.040501

 

24.11.2022 Upcoming SPICE workshop on Quantum Spinoptics in June

The SPICE workshop "Quantum Spinoptics" will be held from June 13th to 15th, 2023 at the historic WASEM winery, Ingelheim.

The workshop aims at bringing together experts from solid state and quantum optics, with the goal to seed the research area where solid state systems are treated exploiting the knowledge of AMO driven-dissipative platforms, and, vice versa, where quantum optics can exploit concepts from spintronics, magnetism and the physics of correlated materials. Topics include dynamical phase transitions in driven-dissipative ensembles, noise sensing and engineering in light-matter interfaces, quantum optics-inspired pumping schemes applied to condensed matter, and correlated emission and dissipative engineering to build entangled states.

You can apply online for the workshop until April 1st, 2023.

07.11.2022 Joint Publication about Altermagnetism

A joint publication with Jairo Sinova and Libor Šmejkal about the anomalous Hall effect in RuO2 has been published in Nature electronics.

They observe an anomalous Hall effect in the altermagnet RuO2 which has no net magnetization yet spin split electronic bands. They further show that, that the anomalous Hall effect dominates over an ordinary Hall contribution. This could lead to the exploration of topological Berry phases and dissipationless quantum transport in crystals of abundant elements and with a compensated antiparallel magnetic order.

You can find the publication under nature.com/articles/s41928-022-00866-z.

17.10.2022 Joint Publication about Spin Transport in Antiferromagnets

A joint publication with Jairo Sinova and Libor Šmejkal about spin transport in the canted antiferromagnet YFeO3 has been published in Nature Communications.

They report long range spin transport in YFeO3 by a transport mechanism that is combined from the Dzyaloshinskii-Moriya interaction and externally applied fields. The decay length of spin waves is determined to be hundreds of nanometers and is strongly anisotropic. This result opens the possibility to use the large class of canted antiferromagnets in the technologically relevant field of long range spin transport.

You can find the publication under nature.com/articles/s41467-022-33520-5.

26.09.2022 Joint Publication about Magnetoelastic Antiferromagnets

A joint publication with Helen Gomonay about shape dependent magnetoelastic effects in the antiferromagnet NiO has been published in Physical Review B.

They demonstrate that the antiferromagnetic order in NiO/Pt films can be manipulated via strains. Experiments guided by theoretical models suggest that shape dependent strains require special attention in the design of antiferromagnetic devices.

You can find the publication under PhysRevB.106.094430.

23.09.2022 Publication about Altermagnetism

A publication of Jairo Sinova, Libor Šmejkal and Thomas Jungwirth about altermagnetism, a  new nonrelativistic magnetic phase has been published in Physical Review X.

By the use of spin symmetries they predict a new nonrelativistic magnetic phase, namely altermagnetism. Altermagnets have zero net magnetization (like antiferromagnets) yet spin split electronic bands (like ferromagnets). Such materials are promising candidates for future spintronic devices which combile the advanteges from ferromagnets and antiferromagnets.

You can find the publication under PhysRevX.12.031042