Ultrafast Dynamics of the Topological Semimetal GdSbxTe2-x-δ in the Presence and Absence of a Charge Density Wave

Kirby RJ, Montanaro A, Giusti F, Koch-Liston A, Lei S, Petrides I, Narang P, Burch KS, Fausti D, Scholes GD, Schoop LM (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Journal of Physical Chemistry C American Chemical Society

Book Volume: 127

Pages Range: 577-584

Journal Issue: 1

DOI: 10.1021/acs.jpcc.2c06120

Abstract

Time-resolved dynamics in charge-density-wave materials have revealed interesting out-of-equilibrium electronic responses. However, these are typically only performed in a single material possessing a CDW. As such, it is challenging to separate subtle effects originating from the CDW. Here, we report on the ultrafast dynamics of the GdSbxTe2-x-δ series of materials where EF can be tuned, resulting in a change from an undistorted tetraganal phase to a CDW with a wavevector that depends on x. Using mid-infrared, near-infrared, and visible excitation, we find the dynamics are sensitive to both EF and the presence of the CDW. Specifically, as the Sb content of the compounds increases, transient spectral features shift to higher probe energies. In addition, we observe an enhanced lifetime and change in the sign of the transient signal upon removing the CDW with high Sb concentrations. Finally, we reveal fluence- and temperature-dependent photoinduced responses of the differential reflectivity, which provide evidence of transient charge density wave suppression in related telluride materials. Taken together our results provide a blueprint for future ultrafast studies of CDW systems.

Authors with CRIS profile

Angela Montanaro
Daniele Fausti Lehrstuhl für Festkörperphysik

Additional Organisation(s)

FAU Profilzentrum Licht.Materie.Quantentechnologien (FAU LMQ)

Involved external institutions

Princeton University US United States (USA) (US) Università degli Studi di Trieste IT Italy (IT) Boston College US United States (USA) (US) University of California Los Angeles (UCLA) US United States (USA) (US)

How to cite

APA:

Kirby, R.J., Montanaro, A., Giusti, F., Koch-Liston, A., Lei, S., Petrides, I.,... Schoop, L.M. (2023). Ultrafast Dynamics of the Topological Semimetal GdSbxTe2-x-δ in the Presence and Absence of a Charge Density Wave. Journal of Physical Chemistry C, 127(1), 577-584. https://doi.org/10.1021/acs.jpcc.2c06120

MLA:

Kirby, Robert J., et al. "Ultrafast Dynamics of the Topological Semimetal GdSbxTe2-x-δ in the Presence and Absence of a Charge Density Wave." Journal of Physical Chemistry C 127.1 (2023): 577-584.

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