Charge-order dynamics in underdoped La$_{1.6-x}$Nd$_{0.4}$Sr$_{x}$CuO$_{4}$ revealed by electric pulses
ORAL
Abstract
The dynamics of the charge-order domains has been investigated in La$_{1.48}$Nd$_{0.4}$Sr$_{0.12}$CuO$_{4}$, a prototypical stripe-ordered cuprate, using pulsed current injection. We first identify the regime in which nonthermal effects dominate over simple Joule heating and then demonstrate that, for small enough perturbation, pulsed current injection allows access to nonthermally induced resistive metastable states. The results are consistent with the pinning of the fluctuating charge order, with fluctuations being most pronounced at the charge-order onset temperature. The nonequilibrium effects are revealed only when the transition is approached from the charge-ordered phase. Our experiment establishes pulsed current injection as a viable and effective method for probing the charge-order dynamics in various other materials [1]. [1] Pokharel, Bal K., et al.,Appl.Phys. Lett. 118, 244104 (2021)
*This work was supported by NSF Grant No. DMR-1707785, and the National High Magnetic Field Laboratory through the NSF Cooperative Agreement No. DMR-1644779, DMR-1644779 via User Collaboration Grants Program 5206, and the State of Florida.
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