Xanthe Henderike Verbeek^1*, David Voderholzer^1*, Stefan Schären^1*, Yannick Gachnang^1*, Nicola Ann Spaldin^1*, Sayantika Bhowal^1,2*

1 Materials Department, ETH Zürich, CH-8093 Zürich, Zürich, Switzerland

2 Department of Physics, Indian Institute of Technology Bombay, Mumbai

* Corresponding authors emails: xverbeek@ethz.ch, dvoderhol@student.ethz.ch, schastef@student.ethz.ch, yannick.gachnang@gmail.com, nspaldin@ethz.ch, sbhowal@iitb.ac.in

DOI10.24435/materialscloud:w9-qz [version v1]

Publication date: Nov 07, 2024

How to cite this record

Xanthe Henderike Verbeek, David Voderholzer, Stefan Schären, Yannick Gachnang, Nicola Ann Spaldin, Sayantika Bhowal, Non-relativistic ferromagnetotriakontadipolar order and spin splitting in hematite, Materials Cloud Archive 2024.180 (2024), https://doi.org/10.24435/materialscloud:w9-qz

Description

We show that hematite, 𝛼-Fe₂O₃, below its Morin transition, has a ferroic ordering of rank-5 magnetic triakontadipoles on the Fe ions. In the absence of spin-orbit coupling, these are the lowest-order ferroically aligned magnetic multipoles, and they give rise to the g-wave non-relativistic spin splitting in hematite. We find that the ferroically ordered magnetic triakontadipoles result from the simultaneous antiferroic ordering of the charge hexadecapoles and the magnetic dipoles, providing a route to manipulating the magnitude and the sign of the magnetic triakontadipoles as well as the spin splitting. Furthermore, we find that both the ferroic ordering of the magnetic triakontadipoles and many of the spin-split features persist in the weak ferromagnetic phase above the Morin transition temperature.

Materials Cloud sections using this data

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File name	Size	Description
DFT_calculations.tar.gz MD5md5:41b36758be364ad29f12badaba63bf29	57.4 MiB	tar.gz archive with all data needed to run the DFT calculations and generate the results discussed in the paper
README.txt MD5md5:b987b25a4799d4c015bfdf5dcfa758d0	3.1 KiB	text file containing a description of the tar.gz archive

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Keywords

ERC H2020 Multipoles