Spin Currents and Magnon Transport

Pure spin currents represent the charge-less transport of angular momentum. Our present research is focused on the injection, transport, and detection of magnon-based angular momentum transport in insulating, long-range ordered magnetic materials. We aim at the detailed understanding of spin transport and its precise control as the key ingredient for novel spin current-based devices.
Team
Matthias Althammer, Stephan Geprägs, Hans Huebl, Matthias Opel, Matthias Grammer, Katharina Müller, Monika Scheufele, Fiona Sosa, Paul Nufer
ICON project
Recent projects
Chiral phonons for spintronics
Hans Huebl, Stephan Geprägs, Matthias Opel, Matthias Althammer
Pseudospin-based Antiferromagnetic Magnonics
Matthias Althammer
ICON publication
Recent publications
Chiral Altermagnon in MnTe
Daniel Jost, Resham B. Regmi, Samuel Sahel-Schackis, Monika Scheufele, Marcel Neuhaus, Rachel Nickel, Flora Yakhou, Kurt Kummer, Nicholas Brookes, Lingjia Shen, Georgi L. Dakovski, Nirmal J. Ghimire, Stephan Geprägs, Matthias F. Kling
Research Article | arXiv:2501.17380
Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface
Miina Leiviskä, Reza Firouzmandi, Kyo-Hoon Ahn, Peter Kubaščik, Zbynek Soban, Satya Prakash Bommanaboyena, Christoph Müller, Dominik Kriegner, Sebastian Sailler, Michaela Lammel, Kranthi Kumar Bestha, Libor Šmejkal, Jakub Zelezny, Anja U. B. Wolter, Monika Scheufele, Johanna Fischer, Matthias Opel, Stephan Geprägs, Matthias Althammer, Bernd Büchner, Tomas Jungwirth, Lukáš Nádvorník, Sebastian T. B. Goennenwein, Vilmos Kocsis, Helena Reichlová
Research Article | Physical Review Materials 9, 084403  (2025)
Preprint: arXiv:2501.19198
Impact of growth conditions on magnetic anisotropy on the magnon Hanle effect in α-Fe2O3
Monika Scheufele, Janine Gückelhorn, Matthias Opel, Akashdeep Kamra, Hans Huebl, Rudolf Gross, Stephan Geprägs, Matthias Althammer
Research Article | APL Materials 11, 091115  (2023)
Preprint: arXiv:2306.00375
Observation of nonreciprocal magnon Hanle effect
Janine Gückelhorn, Sebastián de-la-Peña, Matthias Grammer, Monika Scheufele, Matthias Opel, Stephan Geprägs, Juan Carlos Cuevas, Rudolf Gross, Hans Huebl, Akashdeep Kamra, Matthias Althammer
Research Article | Physical Review Letters 130, 216703  (2023)
Preprint: arXiv:2209.09040
All-Electrical Magnon Transport Experiments in Magnetically Ordered Insulators
Matthias Althammer
Review | Physica Status Solidi (RRL) 15, 2100130  (2021)
Preprint: arXiv:2103.08996

Antiferromagnetic Spintronics

Antiferromagnetic materials promise improved performance for spintronic applications, as they are robust against external magnetic field perturbations and allow for faster magnetization dynamics as well as a higher packing density, compared to ferromagnets. The spin Hall magnetoresistance (SMR) effect is a versatile tool to probe the antiferromagnetic spin structure via simple electrical transport experiments. We investigate ...

  • the spin Hall magnetoresistance (SMR) effect in antiferromagnetic and altermagnetic insulators and
  • the topological Hall effect (THE) and related phenomena in materials with large spin-orbit coupling.

Magnon Spin Transport

Pure spin currents represent the chargeless transport of angular momentum. We investigate ...

  • the diffusive magnon spin transport in insulators with long-range magnetic order and
  • the spin texture and its evolution as a function of the external magnetic field.