Ferroelectric Polarization Reversal vs Pump Spot Shape
arXiv:2108.07111 · doi:10.1103/PhysRevB.104.L140102
Abstract
It has recently been shown that the polarization of a ferroelectric can be strongly affected by light pumping or even transiently reversed by mid-IR pumping within a record short subpicosecond timescale. It was then suggested that the reversal of polarization is most likely prevented by the depolarizing field that appears during the process. To minimize the effect of the depolarizing field, I propose to create an elongated domain by choosing a corresponding pump spot shape. I calculate the polarization dynamics for a particular experimental setup with mid-IR pumping and show that the polarization reversal is possible in this case.
arXiv comment4 pages, 3 figures
References in corpus (13)
- Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
- Advanced capabilities for materials modelling with Quantum ESPRESSO
- Nonlinear phononics: A new ultrafast route to lattice control
- Ultrafast photo-magnetic recording in transparent medium
- Ultrafast reversal of the ferroelectric polarization
- Ultrafast Structure Switching through Nonlinear Phononics
- Proposal for ultrafast switching of ferroelectrics using mid-infrared pulses
- Indirect but Efficient: Laser-Excited Electrons Can Drive Ultrafast Polarization Switching in Ferroelectric Materials
- Breaking Symmetry with Light: Ultra-Fast Ferroelectricity and Magnetism from Three-Phonon Coupling
- Parametric excitation of an optically silent Goldstone-like phonon mode
- Interplay between Ferroelectricity and Metallicity in BaTiO
- Ultrafast reversal of the ferroelectric polarization by a midinfrared pulse
- Ultrafast modulation of covalency in GeTe driven by a ferroelectric soft mode