Ultrafast Optical Control of the Electronic Properties of $ZrTe_5$

TL;DR

This study investigates how ultrafast optical techniques can manipulate the electronic properties of ZrTe_5, revealing temperature-dependent band structure changes and enabling control over its transport properties.

Contribution

It demonstrates the ultrafast optical control of ZrTe_5's electronic band structure and quasiparticle dynamics, advancing potential applications in thermoelectric and magnetoelectric devices.

Findings

Electronic band structure depends on temperature.

Ultrafast optical pulses can modify binding energy and quasiparticle lifetime.

Control over transport properties is achievable on ultrashort timescales.

Abstract

We report on the temperature dependence of the $ZrTe_5$ electronic properties, studied at equilibrium and out of equilibrium, by means of time and angle resolved photoelectron spectroscopy. Our results unveil the dependence of the electronic band structure across the Fermi energy on the sample temperature. This finding is regarded as the dominant mechanism responsible for the anomalous resistivity observed at T* $\sim$ 160 K along with the change of the charge carrier character from holelike to electronlike. Having addressed these long-lasting questions, we prove the possibility to control, at the ultrashort time scale, both the binding energy and the quasiparticle lifetime of the valence band. These experimental evidences pave the way for optically controlling the thermoelectric and magnetoelectric transport properties of $ZrTe_5$.