Real-time observation of the coherent transition to a metastable emergent state in 1T-TaS${}_2$

Abstract

The transition to a hidden metastable state in 1T-TaS2 is investigated in real time using coherent time-resolved femtosecond spectroscopy. Relying on spectral differences between phonon modes in the equilibrium states and in the metastable state, and temperature-tuning the metastable state lifetime, we perform stroboscopic measurements of the electronic response and switching of coherent oscillation frequency through the transition. Very fast coherent switching of the collective mode frequency is observed (400 fs), comparable to the electronic timescale (300 fs). A slower, 4.7 ps process is attributed to lattice relaxation. The observations are described well by a fast electronic band structure transformation into the metastable state, consistent with a topological transition.

arXiv comment11 pages, 4 figures

References in corpus (13)

• Ultrafast switching to a stable hidden topologically protected quantum state in an electronic crystal
• Memristive phase switching in two-dimensional crystals
• Orbital textures and charge density waves in transition metal dichalcogenides
• Coherent dynamics of macroscopic electronic order through a symmetry-breaking transition
• Fast non-thermal switching between macroscopic charge-ordered quantum states induced by charge injection
• Momentum-dependent snapshots of a melting charge density wave
• A new high-temperature quantum spin liquid with polaron spins
• Watching the birth of a charge density wave order: diffraction study on nanometer-and picosecond-scales
• Manipulating charge-density-wave in $1T$-TaS${}_2$ by charge carrier doping: A first-principles investigation
• Incoherent topological defect recombination dynamics in TbTe_3
• Dynamics of broken symmetry nodal and anti-nodal excitations in Bi_{2} Sr_{2} CaCu_{2} O_{8+δ} probed by polarized femtosecond spectroscopy
• Stacking order dynamic in the quasi-two-dimensional dichalcogenide 1T-TaS${}_2$ probed with MeV ultrafast electron diffraction
• Evolution of coherent collective modes through consecutive CDW transitions in (PO${}_2$)${}_4$(WO${}_3$)${}_{12}$ mono-phosphate tungsten bronze

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• Ultrafast manipulation of mirror domain walls in a charge density wave
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• Intertwined chiral charge orders and topological stabilization of the light-induced state of a prototypical transition metal dichalcogenide
• Light-induced dimension crossover in 1T-TiSe${}_2$ dictated by excitonic correlations
• A time-domain phase diagram of metastable states in a charge ordered quantum material
• Snapshots of a light-induced metastable hidden phase driven by the collapse of charge order
• Dynamics and Resilience of the Charge Density Wave in a bilayer kagome metal
• Ultrafast Modulations And Detection of a Ferro-rotational Charge Density Wave Using Time-resolved Electric Quadrupole Second Harmonic Generation
• Ultra-Efficient Resistance Switching between Charge Ordered Phases in 1T-TaS${}_2$ with a Single Picosecond Electrical Pulse
• Renormalization of the Mott gap by lattice entropy: The case of 1T-TaS2
• Photoinduced Dynamics of Commensurate Charge Density Wave in 1T-TaS${}_2$ Based on Three-Orbital Hubbard Model
• Dynamic phase transition into a mixed-CDW state in 1$T$-TaS${}_2$ via a thermal quench
• First-order kinetics bottleneck during photoinduced ultrafast insulator-metal transition in 3D orbitally-driven Peierls insulator CuIr${}_2$S${}_4$
• Effect of Interlayer Stacking on the Electronic Properties of 1$T$-TaS${}_2$
• Origin of Stripe and Quasi-Stripe CDW Structures in Monolayer MX${}_2$ compounds: Multivalley Free Energy Landscape
• Imaging of electrically controlled van der Waals layer stacking in 1T-TaS2
• Nonvolatile optical control of interlayer stacking order in 1T-TaS2