Dachun Gu

TL;DR: It is reported that in the superconducting iron chalcogenides, a secondsuperconducting phase suddenly re-emerges above 11.5 GPa, after the Tc drops from the first maximum of 32 K at 1 GPa.

TL;DR: In this paper, a series of in situ high-pressure synchrotron x-ray diffraction and single-crystal transport measurements was carried out on Cd3As2, and it was shown that the 3DDSM transition from a metallic tetragonal phase to a semiconducting monoclinic phase in space group P2(1)/c at critical pressure 2.57 GPa.

TL;DR: In this article, a high-pressure study on the insulating samples with pure 245 phase and biphasic superconducting (SC) samples was conducted and it was shown that the Mott insulating (MI) state and the M' state coexist over a significant range of pressure up to similar to 10 GPa, the same pressure at which the superconductivity vanishes.

TL;DR: The observation of a double-domesuperconducting phase may provide a hint for pursuing the superconducting coupling-mechanism of ammoniated/non-ammoniated metal-doped FeSe.

TL;DR: In this paper, the authors used angle-resolved photo-emission spectroscopy to study a major fraction of the known 122$^{*}$-series iron chalcogenides with chemical substitution.