Abstract
The time evolution of magnetization induced by circularly polarized light in an Heisenberg chain with large easy-plane anisotropy is studied numerically and analytically. Results at constant light frequency are interpreted in terms of absorption lines of the electronic spin resonance spectrum. The application of time-dependent frequency light, so called chirping, is shown to be an efficient procedure in order to obtain within a short time a large, controlled value of the magnetization . Furthermore, comparison with a two-level model provides a qualitative understanding of the induced magnetization process.
- Received 12 May 2015
- Revised 3 July 2015
DOI:https://doi.org/10.1103/PhysRevB.93.134412
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