Jacobsen Group
Theoretical Quantum Condensed Matter Research

News

Awarded Australian Federal Medal: Women in Physics Lecturer

I am incredibly honoured to receive this award from the Australian Institute of Physics:
https://www.aip.org.au/WOMEN-IN-PHYSICS-LECTURER

I look forward to the associated Australian Lecture Tour that I will embark on together with my co-recipient Dr. Danielle Holmes, and will post dates and places as they become available:
https://www.aip.org.au/Women-in-Physics-Lecture-Tour

It is a great opportunity to spread enthusiasm about Quantum Physics, especially in this International Year of Quantum Physics, 2025.

The announcement has also received attention in the Norwegian press:
https://norwegianscitechnews.com/2025/02/ntnu-physicist-honoured-in-australia/

2025 Postdoc position now closed
Another position (PD or PhD) will open in 2026!

GRANT AWARDED:
12M NOK/1M EUR/$1.7M AUD from Norwegian Research Council for 2025-2030.
Project: SUPERFLEX

Strong photon coupling to high-frequency antiferromagnetic magnons via topological surface states

New preprint on arXiv: 2410.14780

Selected by JPCM for Emerging Leaders 2023

Electrical control of superconducting spin valves using ferromagnetic helices

Now published in: Appl. Phys. Lett. 125, 062602 (2024)

New preprint on arXiv: 2311.12116

Interface probe for antiferromagnets using geometric curvature
Now published: Phys. Rev. B 109, 094508 (2024)

New preprint on arXiv:
2312.06774

Non-constant geometric curvature for tailored spin-orbit coupling and chirality in superconductor-magnet heterostructures
Now published:
J. Phys.: Condens. Matter 36 235302 (2024)

New preprint on arXiv:
2401.01929

Dichroic cavity mode splitting and lifetimes from interactions with a ferromagnetic metal

NOW PUBLISHED AS A LETTER IN PRB:
Phys. Rev. B 110, L161102 (2024)

Tancredi Salamone defends thesis:
Proximity effects in nanostructures with geometric curvature for superconducting spintronics

These have been some wonderful years of exploration and collaboration, and I couldn't be a prouder supervisor! Many thanks to opponents Paola Gentile and Denys Makarov, and Asle Sudbø for administrating the committee.
Photo: A.Sudbø

Group meeting, with special guests Paola Gentile and Denys Makarov

Discussing the future of geometry in superconducting spintronics. What a fantastic group!
Photo: SHJ

New Masters students 2023/4

We welcome Henrik
(left; cavity physics), and Maxim and Kjell (geometric curvature)! Photo: SHJ

Invited lecture at 2023 Grete Hermann Workshop

Thanks to this amazing group of women for a wonderful 3-day workshop hosted by the ct.qmat Würzburg/Dresden excellence cluster. Photo: GHN

Walk to Würzburg Palace

Thanks to the brave few who joined the exploration of Würzburg, also to the chappel and river in the pouring rain the next day! Photo: Michael Klett

Editors' Suggestion in Phys Rev B!

Our first paper of 2023 was selected as Editors' Suggestion in PRB!
It demonstrates a remote sensing scheme where the superconducting transition can be monitored via the change in anisotropy field across a remote ferromagnetic insulator.
Read it here: PRB 107, 035147 (2023)

Andreas T.G. Janssønn defends his thesis:
Cavity-mediated impact of superconductors on ferromagnetic insulators

Many thanks to Frank Schlawin and Hans Huebl for the thorough scrutiny and discussion, and Foteini Oikonomou for making everything run smoothly. Congrats on the nice work, Andreas! Photo: K-E. Sødahl

Cavity-mediated superconductor–ferromagnetic insulator coupling

We predict that the superconductor can be probed over long distances via an induced anisotropy field over a ferromagnetic insulator in our new preprint:
arXiv: 2209.09308

Masters students Eirik and Magnus join the group!

Welcome to Eirik Høydalsvik (left-working on cavity physics) and Magnus Skjærpe (right - working on curvature effects in heterostructures)! Photo: SHJ

Korea-Nordics Meeting on Quantum Materials (Oct.5-7)

You can check speakers and register for online attendance here:
https://sites.google.com/view/ledareworkshop2022/home

High magnetic field superconductivity in a two-band superconductor

Check out our new preprint:
arxiv.org/abs/2208.04338

I'll be giving an invited talk in the geometric design colloquium at CMD29 in Manchester in August - sign up by end of April!

Mariell Breivik will defend her Masters thesis on Thursday 5th of May!

Curvature-control of the superconducting transition, published in PRB 105, 134511 (2022)

Curvature-induced current reversal, published in PRB 104, L060505 (2021)

QuSpin International Spintronics Conference

I'll be giving an invited talk on Friday 15th June with the title

"Twists and turns in superconducting spintronics: how curvature expands the horizon"

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