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Universal Decomposition of the Low-Frequency Conductivity Spectra of Iron-Pnictides Uncovering Fermi-Liquid Behavior
D. Wu, N. Barisic, P. Kallina +9
Infrared reflectivity measurements on 122 iron-pnictides reveal the existence of two electronic subsystems. The one gapped due to the spin-density-wave transition in the parent mat…
Origin of Low-Energy Excitations in Charge-Ordered Manganites
E. Zhukova, B. Gorshunov, T. Zhang. +5
The low-energy excitations in the charge-ordered phase of polycrystalline La0.25Ca0.75MnO3 are explored by frequency-domain terahertz spectroscopy. In the frequency range from 4 cm…
Observing the anisotropic optical response of the heavy-fermion compound UNi2Al3
Julia P. Ostertag, Marc Scheffler, Martin Dressel +1
The optical conductivity of heavy fermions can reveal fundamental properties of the charge carrier dynamics in these strongly correlated electron systems. Here we extend the conven…
Dielectric properties of ultrathin metal films around the percolation threshold
Martin Hövel, Martin Alws, Bruno Gompf +1
We report on optical reflection measurements of thin Au films at and around the percolation threshold (film thickness 3 to 10 nm) in an extremely broad spectral range from 500 to 3…
Bandwidth-controlled Mott transition in kappa-(BEDT-TTF)2Cu[N(CN)2]Br{x}Cl{1-x}: Optical studies of correlated carriers
Michael Dumm, Daniel Faltermeier, Natalia Drichko +3
In the two-dimensional organic charge-transfer salts kappa-(BEDT-TTF)2Cu[N(CN)2]Br{x}Cl{1-x} a systematic variation of the Br content from x = 0 to 0.9 allows us to tune the Mott t…