1. Long-lived magnetization in an atomic spin chain tuned to a diabolic point
- Author
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Elbertse, R. J. G., Borodin, D., Oh, J., Ahn, T., Hwang, J., Rietveld, J. C., Heinrich, A. J., Delgado, F., Otte, S., and Bae, Y.
- Subjects
Quantum Physics ,Condensed Matter - Other Condensed Matter - Abstract
Scaling magnets down to where quantum size effects become prominent triggers quantum tunneling of magnetization (QTM), profoundly influencing magnetization dynamics. Measuring magnetization switching in an Fe atomic chain under a carefully tuned transverse magnetic field, we observe a non-monotonic variation of magnetization lifetimes around a level crossing, known as the diabolic point (DP). Near DPs, local environment effects causing QTM are efficiently suppressed, enhancing lifetimes by three orders of magnitude. Adjusting interatomic interactions further facilitates multiple DPs. Our study provides a deeper understanding of quantum dynamics near DPs and enhances our ability to engineer a quantum magnet., Comment: Main text and Supplementary
- Published
- 2024