Ultrafast pseudomagnetic fields from electron-nuclear quantum geometry
Abstract
Recent experiments demonstrate precise control over coherently excited phonon modes using high-intensity terahertz lasers, opening new pathways towards dynamical, ultrafast design of magnetism in functional materials. In this work, we put forward a coupling mechanism based on electron-nuclear quantum geometry. This effect is rooted in the phase accumulation of the electronic wavefunction under a circular evolution of nuclear coordinates. An excitation pulse then induces a transient level splitting between electronic orbitals that carry angular momentum. When converted to effective magnetic fields, values on the order of tens of Teslas are easily reached.
- Publication:
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arXiv e-prints
- Pub Date:
- March 2024
- DOI:
- 10.48550/arXiv.2403.13070
- arXiv:
- arXiv:2403.13070
- Bibcode:
- 2024arXiv240313070K
- Keywords:
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- Condensed Matter - Materials Science;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 6 pages, 3 figures, supplementary information