Rational Control of Magnonic and Electronic Band Splittings
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866918138491174912 |
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| author | Bandyopadhyay, Subhadeep Raj, Anoop Ghosez, Philippe Pujari, Sumiran Bhowal, Sayantika |
| author_facet | Bandyopadhyay, Subhadeep Raj, Anoop Ghosez, Philippe Pujari, Sumiran Bhowal, Sayantika |
| contents | We provide a theoretical demonstration of controllable non-relativistic spin splitting in both electronic and magnonic bands via targeted structural distortions tied to specific phonon modes. Using MnF$_2$ as a model system, we identify a $d$-wave magnon band splitting between magnon modes of specific handedness, directly correlated with the non-relativistic spin splitting observed in the electronic structure. Crucially, we show that structural distortions associated with the A$_{2u}$ and A$_{1g}$ phonon modes (8.52 and 9.74 THz) modulate these splittings without altering the antiferromagnetic order. The effect originates from changes in the nonmagnetic ligand environment, highlighting the key role of lattice degrees of freedom in governing spin dynamics. Our findings establish a novel route for structure-mediated control of spin splitting, opening possibilities for tunable magnonic and spintronic functionalities in antiferromagnetic materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_04934 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Rational Control of Magnonic and Electronic Band Splittings Bandyopadhyay, Subhadeep Raj, Anoop Ghosez, Philippe Pujari, Sumiran Bhowal, Sayantika Materials Science We provide a theoretical demonstration of controllable non-relativistic spin splitting in both electronic and magnonic bands via targeted structural distortions tied to specific phonon modes. Using MnF$_2$ as a model system, we identify a $d$-wave magnon band splitting between magnon modes of specific handedness, directly correlated with the non-relativistic spin splitting observed in the electronic structure. Crucially, we show that structural distortions associated with the A$_{2u}$ and A$_{1g}$ phonon modes (8.52 and 9.74 THz) modulate these splittings without altering the antiferromagnetic order. The effect originates from changes in the nonmagnetic ligand environment, highlighting the key role of lattice degrees of freedom in governing spin dynamics. Our findings establish a novel route for structure-mediated control of spin splitting, opening possibilities for tunable magnonic and spintronic functionalities in antiferromagnetic materials. |
| title | Rational Control of Magnonic and Electronic Band Splittings |
| topic | Materials Science |
| url | https://arxiv.org/abs/2412.04934 |