High-temperature superconductivity in iron pnictides and chalcogenides emerges when a
magnetic phase is suppressed. The multi-orbital character and the strength of correlations …

Inelastic scattering of visible light (Raman effect) offers a window into properties of
correlated metals such as spin, electron and lattice dynamics as well as their mutual …

Polarized Raman-scattering spectra of superconducting, single-crystalline FeSe evidence
pronounced phonon anomalies with temperature reduction. A large (∼ 6.5%) hardening of …

The charge and spin dynamics of the structurally simplest iron-based superconductor, FeSe,
may hold the key to understanding the physics of high temperature superconductors in …

We use point-contact spectroscopy (PCS) to probe AE Fe 2 A s 2 (AE= Ca, Sr, Ba) and Fe 1+
y Te. For AE= Sr, Ba we detect orbital fluctuations above TS while for AE= Ca these …

We report infrared studies of A Fe 2 As 2 (A= Ba, Sr), two representative parent compounds
of iron-arsenide superconductors, at magnetic fields (B) up to 17.5 T. Optical transitions …

We discuss how to analyze the optical conductivity and Raman spectra of multiorbital
systems using the velocity and the Raman vertices in a similar way Raman vertices were …

We report results of Raman scattering experiments on twin-free BaFe 2 As 2 with the main
focus placed on understanding the influence of electronic and spin degrees of freedom on …

Raman scattering experiments on LaFeAsO with distinct antiferromagnetic (T AFM= 140 K)
and tetragonal-orthorhombic (TS= 155 K) transitions show a quasielastic peak (QEP) in B 2 …

Fermi liquid theory is remarkably successful in describing the transport and optical
properties of metals; at frequencies higher than the scattering rate, the optical conductivity …