Ultrafast measurements under anisotropic strain reveal near equivalence of competing charge orders in TbTe${}_3$

Abstract

We report ultrafast reflectivity measurements of the dynamics of the order parameter of the charge density wave (CDW) in TbTe${}_3$ under anisotropic strain. We observe an increase in the frequency of the amplitude mode with increasing tensile strain along the $a$-axis (which drives the lattice into $a>c$, with $a$ and $c$ the lattice constants), and similar behavior for tensile strain along $c$ ($c>a$). This suggests that both strains stabilize the corresponding CDW order and further support the near equivalence of the CDW phases oriented in $a$- and $c$-axis, in spite of the orthorhombic space group. The results were analyzed within the time-dependent Ginzburg-Landau framework, which agrees well with the reflectivity dynamics.

7 pages, 4 figures

References in corpus (7)

• Single-particle and collective mode couplings associated with 1- and 2-directional electronic ordering in metallic RTe${}_3$ (R = Ho, Dy, Tb)
• Pressure dependence of the charge-density-wave and superconducting states in GdTe${}_3$, TbTe${}_3$ and DyTe${}_3$
• Coexistence and competition of multiple charge-density-wave orders in rare-earth tri-telluride RTe3
• Nonequilibrium Charge-Density-Wave Order Beyond the Thermal Limit
• Formation of buried domain walls in the ultrafast transition of SmTe${}_3$
• Evidence for realignment of the charge density wave state in ErTe${}_3$ and TmTe${}_3$ under uniaxial stress via elastocaloric and elastoresistivity measurements
• Emergent Tetragonality in a Fundamentally Orthorhombic Material

Cited by in corpus (3)

• Unveiling Nano-scale Crystal Deformation using Coherent X-ray Dynamical Diffraction
• Strain Engineering of Correlated Charge-Ordered Phases in 1T-TaS2
• Tracking the local order parameter through the Hubbard exciton decoherence time in the Mott-Hubbard insulator LaVO3