Fermi Arcs in an Antiferromagnet detected at BESSY II

Fermi surface of antiferromagnetic NdBi taken at 6 K temperature at BESSY II. It shows so called Fermi arcs.
Credit: https://www.nature.com/articles/s41586-022-04412-x

Neodymium-Bismuth crystals belong to the wide range of materials with interesting magnetic properties. The Fermi surface which is measured in the experiments contains information on the transport properties of charge carriers in the crystal.

While usually the Fermi surface consists of closed contours, disconnected sections known as Fermi arcs are very rare and can be signatures of unusual electronic states.

Unusual magnetic splittings

In a study, published now in Nature, the team presents experimental evidence for such Fermi arcs. They observed an unusual magnetic splitting in the antiferromagnetic state of the samples below a temperature of 24 Kelvin (the Néel-temperature).

This splitting creates bands of opposing curvature, which changes with temperature together with the antiferromagnetic order.

These findings are very important because they are fundamentally different from previously theoretically considered and experimentally reported cases of magnetic splittings. In the case of well-known Zeeman and Rashba splittings, the curvature of the bands is always preserved.

Since both splittings are important for spintronics, these new findings could lead to novel applications, especially as the focus of spintronics research is currently moving from traditional ferromagnetic to antiferromagnetic materials.

Journal: Nature
DOI: 10.1038/s41586-022-04412-x
Method of Research: Experimental study
Subject of Research: Not applicable
Article Title: Emergence of Fermi arcs due to magnetic splitting in an antiferromagnet
Article Publication Date: 23-Mar-2022
COI Statement: none

Media Contact

Antonia Roetger
Helmholtz-Zentrum Berlin für Materialien und Energie
antonia.roetger@helmholtz-berlin.de
Office: 0049-308-062-43733

Expert Contact

Dr. Adam Kaminski
Ames Laboratory, Iowa, USA
adamkam@ameslab.gov

www.ameslab.gov

https://www.helmholtz-berlin.de/pubbin/news_seite?nid=23507&sprache=en&seitenid=1

Media Contact

Antonia Roetger
Helmholtz-Zentrum Berlin für Materialien und Energie

All latest news from the category: Physics and Astronomy

This area deals with the fundamental laws and building blocks of nature and how they interact, the properties and the behavior of matter, and research into space and time and their structures.

innovations-report provides in-depth reports and articles on subjects such as astrophysics, laser technologies, nuclear, quantum, particle and solid-state physics, nanotechnologies, planetary research and findings (Mars, Venus) and developments related to the Hubble Telescope.

Back to home

Comments (0)

Write a comment

Newest articles

Future AR/VR controllers could be the palm of your hand

Carnegie Mellon University’s EgoTouch creates simple interfaces for virtual and augmented reality. The new generation of augmented and virtual reality controllers may not just fit in the palm of your…

‘Game changer’ in lithium extraction

Rice researchers develop novel electrochemical reactor. A team of Rice University researchers led by Lisa Biswal and Haotian Wang has developed an innovative electrochemical reactor to extract lithium from natural…

The blue-green sustainable proteins of seaweed

… may soon be on your plate. The protein in sea lettuce, a type of seaweed, is a promising complement to both meat and other current alternative protein sources. Seaweed…