From the 1 of 6 linked papers with an AI index.
6 papers
Unified Terahertz Framework for Magnetic and Lattice Responses Reveals an Elusive Ordering Transition in GdRuO
Nicolas M. Kawahala, Rafael L. Sabainsk, Esteban Marulanda +2
The paper uses terahertz spectroscopy to simultaneously probe magnetic and lattice excitations in the pyrochlore ruthenate Gd₂Ru₂O₇, identifying an exchange‑split Gd³⁺ mode coupled…
Colossal Terahertz Magnetoresistance from Magnetic Polarons in EuZnP
E. Marulanda, M. Dutra, N. M. Kawahala +5
Magnetic polarons can generate colossal magnetoresistance in magnetic semiconductors, yet their terahertz electrodynamics remain largely unexplored. Here we report magneto-terahert…
Engineering a Correlated Narrow-Gap Semiconductor: Effects of Ga Substitution in EuZnP
M. Dutra, E. Marulanda, G. G. Vasques +11
The effect of Ga substitution on the electronic, magnetic, and low-energy responses of the Zintl phase EuZnP is investigated by electrical transport, electron spin resonanc…
Optimizing Aperture Geometry in THz-TDS for Accurate Spectroscopy of Quantum Materials
Laura O. Dias, Eduardo D. Stefanato, Nicolas M. Kawahala +1
Terahertz time-domain spectroscopy (THz-TDS) provides a powerful platform for investigating low-energy excitations in quantum materials. Because these materials are often limited i…
Windowing in terahertz time-domain spectroscopy: resolving resonances in thin-film samples
Esteban Marulanda, Fernanda L. Costa, Nicolas M. Kawahala +1
Terahertz time-domain spectroscopy (THz-TDS) has become a powerful tool for investigating the optical properties of thin films, offering direct access to the complex permittivity i…
Metallicity-driven polar transitions in topological epilayers
Eduardo D. Stefanato, Nicolas M. Kawahala, Bianca A. Kawata +3
Polar metals, materials that exhibit both electric polarization and high conductivity, can also host topological phases. Because free carriers strongly suppress distortive polar or…