In MnF2, structural distortions along the A2u and A1g phonon modes tune and can switch off both electronic and magnon band splittings without changing the antiferromagnetic order.
Designing Non-Relativistic Spin Splitting in Oxide Perovskites
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abstract
We investigate the role of atomic distortions in non-relativistic spin splitting in perovskite oxides with Pbnm symmetry. Using LaMnO3 as a representative material, we analyze its non-relativistic spin splitting through a combined phonon and multipolar analysis. Our study provides key insights into how structural distortions and magnetic ordering drive ferroically ordered magnetic multipoles, which, in turn, give rise to non-relativistic spin splitting. Based on these findings, we propose three strategies for engineering non-relativistic spin splitting: modifying the A-site cation size, strain engineering, and electric field control in superlattice structures. Our work establishes a framework for designing non-relativistic spin splitting in the Brillouin zone of oxide perovskites.
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Rational Control of Magnonic and Electronic Band Splittings
In MnF2, structural distortions along the A2u and A1g phonon modes tune and can switch off both electronic and magnon band splittings without changing the antiferromagnetic order.