We present a high throughput computational search for altermagnetism in two-dimensional (2D) materials based on the Computational 2D Materials Database (C2DB). We start by showing that the symmetry requirements for altermagnetism in 2D are somewhat more strict compared to bulk materials and applying these yields a total of seven altermagnets in the C2DB. The collinear ground state in these monolayers is verified by spin spiral calculations using the generalized Bloch theorem. We focus on four d-wave altermagnetic materials belonging to the magnetic space group—RuF4, VF4, AgF2, and OsF4. The first three of these are known experimentally as van der Waals bonded bulk materials and are likely to be exfoliable from their bulk parent compounds. We perform a detailed analysis of the electronic structure and non-relativistic spin splitting in k-space exemplified by RuF4. The magnon spectrum of RuF4 is calculated from the magnetic force theorem, and it is shown that the symmetries that enforce degenerate magnon bands in anti-ferromagnets are absent in altermagnets and give rise to the non-degenerate magnon spectrum. We then include spin–orbit effects and show that these will dominate the splitting of magnons in RuF4. Finally, we provide an example of i-wave altermagnetism in the 2H-phase of FeBr3.
Skip Nav Destination
Article navigation
29 April 2024
Research Article|
May 02 2024
Two-dimensional altermagnets from high throughput computational screening: Symmetry requirements, chiral magnons, and spin-orbit effects
Special Collection:
Magnonics
Joachim Sødequist
;
Joachim Sødequist
(Conceptualization, Data curation, Formal analysis, Methodology, Validation, Visualization, Writing – original draft, Writing – review & editing)
Computational Atomic-Scale Materials Design (CAMD), Department of Physics, Technical University of Denmark
, 2800 Kgs. Lyngby, Denmark
Search for other works by this author on:
Thomas Olsen
Thomas Olsen
a)
(Conceptualization, Data curation, Formal analysis, Methodology, Supervision, Validation, Writing – review & editing)
Computational Atomic-Scale Materials Design (CAMD), Department of Physics, Technical University of Denmark
, 2800 Kgs. Lyngby, Denmark
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
a)Author to whom correspondence should be addressed: [email protected]
Appl. Phys. Lett. 124, 182409 (2024)
Article history
Received:
January 17 2024
Accepted:
April 23 2024
Citation
Joachim Sødequist, Thomas Olsen; Two-dimensional altermagnets from high throughput computational screening: Symmetry requirements, chiral magnons, and spin-orbit effects. Appl. Phys. Lett. 29 April 2024; 124 (18): 182409. https://doi.org/10.1063/5.0198285
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
Roadmap on photonic metasurfaces
Sebastian A. Schulz, Rupert. F. Oulton, et al.
Superconducting flip-chip devices using indium microspheres on Au-passivated Nb or NbN as under-bump metallization layer
Achintya Paradkar, Paul Nicaise, et al.
Special issue APL organic and hybrid photodetectors
Karl Leo, Canek Fuentes-Hernandez, et al.
Related Content
Piezoelectric altermagnetism and spin-valley polarization in Janus monolayer Cr2SO
Appl. Phys. Lett. (August 2023)
Nonlinear field dependence of Hall effect and high-mobility multi-carrier transport in an altermagnet CrSb
Appl. Phys. Lett. (January 2025)
Strain-induced valley polarization, topological states, and piezomagnetism in two-dimensional altermagnetic V2Te2O, V2STeO, V2SSeO, and V2S2O
Appl. Phys. Lett. (November 2024)
Time-resolved magneto-optical effects in the altermagnet candidate MnTe
Appl. Phys. Lett. (November 2024)
Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2
APL Mater. (October 2023)