Possible unconventional order parameter in single crystals of SrPtP superconductor.

Anisotropic properties of single crystals of SrPtP were studied using London penetration depth and electrical resistivity measurements. The upper critical field,Hc2(T), was determined from four-probe electrical resistivity measurements for three orthogonal directions of a magnetic field with respect to the crystal. The London penetration depth,λ(T), was determined from the magnetic susceptibility of the Meissner-London state measured using a tunnel-diode resonator technique.

Low-temperature high-frequency dynamic magnetic susceptibility of classical spin-ice DyTiO.

Radio-frequency (14.6 MHz) AC magnetic susceptibility,χAC', of DyTiOwas measured using self-oscillating tunnel-diode resonator. Measurements were made with the excitation AC field parallel to the superimposed DC magnetic field up to 5 T in a wide temperature range from 50 mK to 100 K.

Using controlled disorder to probe the interplay between charge order and superconductivity in NbSe.

The interplay between superconductivity and charge-density wave (CDW) in 2H-NbSe is not fully understood despite decades of study. Artificially introduced disorder can tip the delicate balance between two competing long-range orders, and reveal the underlying interactions that give rise to them. Here we introduce disorder by electron irradiation and measure in-plane resistivity, Hall resistivity, X-ray scattering, and London penetration depth.

Energy gap evolution across the superconductivity dome in single crystals of (Ba K )FeAs.

The mechanism of unconventional superconductivity in iron-based superconductors (IBSs) is one of the most intriguing questions in current materials research. Among non-oxide IBSs, (Ba K )FeAs has been intensively studied because of its high superconducting transition temperature and fascinating evolution of the superconducting gap structure from being fully isotropic at optimal doping ( ≈ 0.4) to becoming nodal at > 0.