Domain size effects on the dynamics of a charge density wave in 1T-TaS2

Abstract

Recent experiments have shown that the high temperature incommensurate (I) charge density wave (CDW) phase of 1T-TaS2 can be photoinduced from the lower temperature, nearly commensurate (NC) CDW state. Here we report a time-resolved x-ray diffraction study of the growth process of the photoinduced I-CDW domains. The layered nature of the material results in a marked anisotropy in the size of the photoinduced domains of the I-phase. These are found to grow self-similarly, their shape remaining unchanged throughout the growth process. The photoinduced dynamics of the newly formed I-CDW phase was probed at various stages of the growth process using a double pump scheme, where a first pump creates I-CDW domains and a second pump excites the newly formed I-CDW state. We observe larger magnitudes of the coherently excited I-CDW amplitude mode in smaller domains, which suggests that the incommensurate lattice distortion is less stable for smaller domain sizes.

arXiv comment8 pages, 8 figures

References in corpus (11)

• Ultrafast switching to a stable hidden topologically protected quantum state in an electronic crystal
• Orbital textures and charge density waves in transition metal dichalcogenides
• Ultrafast melting of a charge-density wave in the Mott insulator 1T-TaS2
• Phase-ordering of charge density waves traced by ultrafast low-energy electron diffraction
• Femtosecond "snapshots "of gap-forming charge-density-wave correlations in quasi-two-dimensional dichalcogenides 1T-TaS2 and 2H-TaSe2
• Pinning dependent field driven domain wall dynamics and thermal scaling in an ultrathin Pt/Co/Pt magnetic film
• Watching the birth of a charge density wave order: diffraction study on nanometer-and picosecond-scales
• Ultrafast evolution and transient phases of the prototype out-of-equilibrium Mott-Hubbard material V2O3
• Ultrafast transmission electron microscopy on dynamic process of a CDW transition in 1T-TaSe2
• Dynamic conductivity scaling in photoexcited V2O3 thin films
• Surface effects on the Mott-Hubbard transition in archetypal V${}_2$O${}_3$

Cited by in corpus (6)

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• Light-induced hexatic state in a layered quantum material
• A time-domain phase diagram of metastable states in a charge ordered quantum material
• Origin of Stripe and Quasi-Stripe CDW Structures in Monolayer MX${}_2$ compounds: Multivalley Free Energy Landscape
• Non-local optical response of a multi-phased quantum material