This review paper illustrates the main normal and superconducting state properties of
magnesium diboride, a material known since the early 1950s but only recently discovered to …

Magnesium diboride, MgB2, which was discovered to be a superconductor with a transition
temperature c of 39 K in 2YY1 [1], shows a unique property of being a clear example of a …

Multiband superconductors can host collective excitations with marked differences with
respect to their single-band counterpart. We first study the spectrum of collective amplitude …

We report experimental data showing the Feshbach shape resonance in the electron doped
MgB 2 where the chemical potential is tuned by Al, Sc, and C substitutions. The scaling of …

We present the anisotropic optical conductivity of MgB 2 between 0.1 and 3.7 eV at room
temperature obtained on single crystals of different purity by spectroscopic ellipsometry and …

A short review of the optical and far-infrared measurements on MgB2 is given. Multiband
and multigap effects are analyzed by comparing optical properties with other experiments …

The recently discovered superconductivity in MgB 2 has captured world attention due to its
simple crystal structure and relatively high superconducting transition temperature T c= 39 K …

While the reflectance of the basal plane in MgB 2 single crystals exhibits a single in-plane
plasma edge at∼ 16 000 cm− 1, an additional structure shows up at∼ 22 000 cm− 1 in the …

The optical response of the two-band superconductor Mg B 2 has been studied in the 0.7–4
THz range on films with very low impurity level. The effect of the high-energy σ gap is …

We report on terahertz (THz) surface impedance measurement of an epitaxial Mg B 2 thin
film using time domain THz spectroscopy. We show that the surface resistance of the Mg B 2 …