Nonvolatile optical control of interlayer stacking order in 1T-TaS2
arXiv:2405.02831 · doi:10.1038/s41535-025-00836-6
Abstract
Nonvolatile optical manipulation of material properties on demand is a highly sought-after feature in the advancement of future optoelectronic applications. While the discovery of such metastable transition in various materials holds good promise for achieving this goal, their practical implementation is still in the nascent stage. Here, we unravel the nature of the ultrafast laser-induced hidden state in 1T-TaS2 by systematically characterizing the electronic structure evolution throughout the reversible transition cycle. We identify it as a mixed-stacking state involving two similarly low-energy interlayer orders, which is manifested as the charge density wave phase disruption. Furthermore, our comparative experiments utilizing the single-pulse writing, pulse-train erasing and pulse-pair control explicitly reveal the distinct mechanism of the bidirectional transformations -- the ultrafast formation of the hidden state is initiated by a coherent phonon which triggers a competition of interlayer stacking orders, while its recovery to the initial state is governed by the progressive domain coarsening. Our work highlights the deterministic role of the competing interlayer orders in the nonvolatile phase transition in the layered material 1T-TaS2, and promises the coherent control of the phase transition and switching speed. More importantly, these results establish all-optical engineering of stacking orders in low-dimensional materials as a viable strategy for achieving desirable nonvolatile electronic devices.
References in corpus (19)
- Van der Waals heterostructures
- Ultrafast switching to a stable hidden topologically protected quantum state in an electronic crystal
- Nonthermal pathways to ultrafast control in quantum materials
- Orbital textures and charge density waves in transition metal dichalcogenides
- Light-induced emergent phenomena in 2D materials and topological materials
- Fast non-thermal switching between macroscopic charge-ordered quantum states induced by charge injection
- Strongly-Correlated Electron-Photon Systems
- Cooperative photoinduced metastable phase control in strained manganite films
- Coherent control of a structural phase transition in a solid-state surface system
- Femtosecond "snapshots "of gap-forming charge-density-wave correlations in quasi-two-dimensional dichalcogenides 1T-TaS2 and 2H-TaSe2
- Disrupted orbital order and the pseudo-gap in layered 1T-TaS
- Collapse of layer dimerization in the photo-induced hidden state of 1T-TaS2
- Intertwined chiral charge orders and topological stabilization of the light-induced state of a prototypical transition metal dichalcogenide
- Roles of the Narrow Electronic Band near the Fermi Level in 1T-TaS-Related Layered Materials
- Real-time observation of the coherent transition to a metastable emergent state in 1T-TaS
- Zoology of domain walls in quasi-2D correlated charge density wave of 1T-TaS2
- Stacking order dynamic in the quasi-two-dimensional dichalcogenide 1T-TaS probed with MeV ultrafast electron diffraction
- Modified interlayer stacking and insulator to correlated-metal transition driven by uniaxial strain in 1-TaS
- A high-efficiency programmable modulator for extreme ultraviolet light with nm feature size based on an electronic phase transition