Pieter Gunnink

I am Pieter Gunnink, a Post-Doc in theoretical physics, at the Johannes Gutenberg-University Mainz, working in in both the INSPIRE group of Prof. Sinova and the TopMagIc group of Dr. Alexander Mook, as a Marie Skłodowska-Curie Postdoctoral Fellow (Jul 2025–Jun 2027).

My research interests are in magnon transport, with a focus on topology. I have also worked on dipolar interactions in magnon systems and spin transfer torque effects in mesoscopic systems.

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Research Interests

Magnon topology
Various topological phases have been predicted in magnonic systems, but to date none has been directly observed. This can in large part be attributed to the high frequency of the topological edge states. My primary interest is to develop alternative ways to probe magnon topology, such as in non-equilibrium and through non-Hermitian control.
Magnon topology
Spin-transfer torque in mesoscopic systems
The spin-transfer torque is a versatile element in spintronics, converting an electrical current into a torque on a magnetic system. Understanding the spin-transfer torque requires the understanding of the complex non-equilibrium state that is created when the magnet is driven intro preccesion, giving rise to surprising effects.
Spin-transfer torque in mesoscopic systems
Dipole-dipole interactions
Dipole-dipole interactions are ubiqitious in magnonic systems. Because of its long-range character, the dipole-dipole can give rise to unique symmetry-breaking effects, such as transverse spin currents and the magnon Hall effect.
Dipole-dipole interactions

Recent Publications

Pieter Gunnink, Jairo Sinova, Alexander Mook (2025). Spin demons in d-wave altermagnets. arXiv:2504.11062.

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Pieter Gunnink, Jairo Sinova, Alexander Mook (2025). Surface acoustic wave driven acoustic spin splitter in d-wave altermagnetic thin films. arXiv:2502.18007.

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Pieter Gunnink, Alexander Mook (2025). Coupling of plasmons to the two-magnon continuum in antiferromagnets. arXiv:2501.12873.

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Pieter Gunnink, Tim Ludwig, Alexander Shnirman, Rembert A. Duine (2025). Nonequilibrium effects in spin-torque oscillators. Phys. Rev. B 111, 214425.

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Tomas T. Osterholt, Pieter Gunnink, Rembert A. Duine (2024). Detection of Geometric Phases in Spin Waves using Nitrogen-Vacancy Centers. Phys. Rev. B 110, 134424 (Editors’ Suggestion).

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Recent & Upcoming Talks

Magnon spin capacitor
Talk during International Conference on Magnetism (ICM) 2024 on the magnon spin capacitor
Jul 5, 2024 Bologna, Italy
Slides
Accessing topological magnonic excitations in non-equilibrium
Talk during Transnational Round Table on Magnonics (TRTM) 2024
Jun 3, 2024 Exeter, UK
Slides

Experience

 
 
 
 
 
Post-doc
Johannes Gutenberg-University Mainz
October 2023 – Present

My interests are in non-Hermitian spintronics: the study of the spin degree of freedom in a non-Hermitian context. To study this, I loop at a wide range of spintronics systems, with a special interest in their couplings. Other topics I am interested in are dipolar interactions in magnetic systems, (non-Hermitian) topology and spin transfer torque effects in mesoscopic systems.

I have been awarded a Humboldt Postdoctoral Fellowship (Oct 2024-Jun 2025), and a Marie Skłodowska-Curie Postdoctoral Fellowship (Jul 2025-Jun 2027). These fellowships will take place in both the INSPIRE group of Prof. Sinova and the TopMagIc group of Dr. Alexander Mook in Mainz.

 
 
 
 
 
PhD Student
Institute for Theoretical Physics - University Utrecht
September 2019 – September 2023

PhD thesis: Non-equilibrium topology in magnonic systems
Supervisor: Prof. dr. R.A. Duine

I worked on topology in magnon transport and electrical detection, exploring how to measure a variety of topological effects in magnon systems.

 
 
 
 
 
MsC in Applied Physics
University of Twente
August 2017 – August 2019 Enschede, The Netherlands

Master’s thesis title: Engineering a topological insulator

Supervisor: Prof. dr. ir. A. Brinkman

 
 
 
 
 
BsC in Applied Physics
University of Twente
August 2013 – August 2017 Enschede, The Netherlands

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