This week, SPICE hosted a Workshop boosting the new field of Quantum Acoustics‐ a phonon analogue of quantum optics on chip – where single phonons in the form of high‐frequency surface acoustic waves (SAWs) propagate in acoustic waveguides coupling remote qubits. The team of organisers consisted of Göran Johansson (Chalmers, Sweden), Christopher Bäuerle (CNRS, France), Paulo Santos (PDI, Germany) and Floris Zwanenburg (Twente, Netherlands). They brought together three scientific communities which have not interacted substantially before, i.e. Surface Acoustic Waves, Solid State Spin Qubits and Superconducting Qubits. In the beautiful location of Schloss Waldthausen, fifty-two international scientists used talks, discussions and a poster session to explore contact points and potential synergies for these three fields. We thank the organizers and all participants for a successful workshop.
On March 6th, the first day of this year's DPG spring meeting in Regensburg, Christian Back from the University of Regensburg, Stefania Pizzini from the Institut Néel, CNRS and Yuriy Mokrousov from Forschungszentrum Jülich, gave an introductory session on "Spin Hall Effect and Spin-Orbit Torques." In their respective talks, Christian Back introduced the basic concepts of spin currents and spin Hall effect, Stefania Pizzini gave an experimental introduction to spin-orbit torques and Yuriy Mokrousov explained the basics of berry phase physics and spin Hall conductivity on the example of the curvature of a potato chip. Read the full German article.
The organising team, Karin Everschor-Sitte and Matthias Sitte thank all speakers and participants for a very successful session.
This year, the Universidad del Norte in Barranquilla celebrated its 50th anniversary. As part of the festivities, the 19th Catédra Europa took place from March 14th - 18th. The large scale event provides a platform for scientific and cultural encounters between Colombian and European Academia. Jairo Sinova was invited to introduce his visions for new interdisciplinary approaches to scientific work, which he likes to compare to a scientific tango. Accordingly, his lecture was entitled "El tango de la fisica".
The INSPIRE group took part in the open doors day of Johannes Gutenberg Universität Mainz by inviting secondary school students to dip a toe in the water of theoretical Spintronics. Karin Everschor and Jacob Gayles gave our guests a presentation entitled "The future technology of Spintronics – the diverse quantum world of condensed matter" introducing spintronics as a scientific discipline and giving the students a lively insight into the life and work of researchers in this field. After the theoretical part, Andreas Kehlberger from the Kläui Lab took the potential junior researchers on a tour of the laboratories of the experimentalists. We were very happy about the interest shown by the students and are looking forward to host the next collaborative open doors day of the Kläui Lab and INSPIRE/SPICE.
On December 14th, the SPICE team and INSPIRE group had their Christmas party at the cosy tavern "Beichtstuhl" in the Mainz old town. In a cheerful atmosphere, the group members and their plus ones enjoyed the traditional food and wine of the region, looking back at an eventful year 2015 for both the INSPIRE group and the SPICE Center.
On the December 03rd and 4th, the SPICE team and Inspire group had an internal group seminar in the picturesque city of Bamberg in Franconia. Under the title “New Directions in the Spin Phenomena," the participants explored innovative approaches to interdisciplinary in Spintronics Research. After a nice train journey through the Bavarian landscape, SPICE-Director Jairo Sinova opened the seminar in the beautiful Barock Hotel close to the Bamberg cathedral. In the afternoon, the group had a guided tour through the old part of town followed by a visit of the famous Bamberg Christmas Market. After some Glühwein the group enjoyed traditional Bavarian food in the nice atmosphere of a quaint old town restaurant. Friday started with two workshops – one for the administrative staff led by SPICE project manager Valerie Rung and one for the scientific staff managed by our visiting postdoc Kei Yamamoto. We thank the participants for two beautiful and successful days in Bamberg.
On October 23rd and 24th, SPICE hosted the 29th REIMEI and ERATO-SQR workshop. The organisers Junichi Ieda and Jairo Sinova brought together leading theorists and experimentalists to work on effects of the spin-orbit interaction and the coupling of the spin and lattice degrees of freedom in magnetic nanostructures.
Being an efficient spin current detector and generating so-called spin-orbit torques on proximity magnets, the spin Hall effect has moved into the mainstream of magnetism. The electrical and thermal actuation of the magnetization of insulators with extremely high quality factors of the magnetization dynamics has focused attention on the bosonic degrees of freedom in spintronics and the importance of the spin-lattice and spin-rotation couplings.
The scope of the workshop covered the topics:
The magnon-phonon interaction in a magnetic insulator (YIG) to better understand acoustically induced spin pumping and the spin Seebeck effect.
Materials with large spin-orbit interaction examined by combining density functional theory in the local density approximation with the quantum Monte Carlo technique.
The effects of spin-orbit interaction on the magnetization dynamics of ferro-, feri-, and antiferro-magnets and their heterostructures.
Thanks to an initiative of Denise and the help of our universally talented student assistant and Bavaria enthusiast Alex, SPICE and the INSPIRE group hosted their own Oktoberfest and likely the first Oktoberfest in the history of Spintronics. From the traditional Oktoberfest-Bier, an especially tasty brew that is only available during the Oktoberfest season to the appropriate Bavarian music and Weißwurst (white sausage), all the essentials had been organised. Thus it is not surprising that, even if neither binge drinking nor any dancing on the tables were observed (as customary at the original event), the ambiance was great. In the midst of a public which was just as international as the one in Munich, our guest Barry Zink had the opportunity to experience some German local colour.
INSPIRE and the Kläui Lab are now having monthly meetings to intensify the exchange between the theorists and experimentalists of the institute bringing together the two perspectives on nanoelectronic phenomena in order to generate synergies and facilitate intensified future collaborations.
The talks that were held at this month's joint meeting of the INSPIRE Group and the Kläui Lab were:
Kai Litzius: Progress and Problems – Skyrmions and their Dynamics in Thin Magnetic Layers
Jacob Gailes: Ab-initio calculations of the Dzyaloshinskii-Moriya interaction and transport in
From June 29 to July 2, the second official SPICE Workshop took place in Schloß Waldthausen. An international group of 51 participants from different disciplines came together in the scenic castle to share their expertise on a new class of materials known as bad metals and its behavior in Mott Systems. This fundamental emergent physics topic is now being applied in the design and fabrication of new devices such as resistance-switching devices, novel power transistors, as well as “synaptic” devices that mimic the function of the neuron, to name just a few of the possibilities. Yet, The so-called “Bad-metal” behavior phenomenon is often viewed as one of the key unresolved signatures of strong correlation physics. Thirty-two invited speakers from different European countries, Japan, the USA, China, India and Brasil contributed their perspectives on the fundamental issues associated with the new type of phase transition observed in Bad Metals, and its many consequences for material science and technology. Furthermore, 19 poster presentations and four tutorials were given.