Preparation and Superconductivity of New Stage and Polytypic Phases in Potassium-Intercalated Zirconium Nitride Chloride (K_xZrNCl)

Preparation and superconductivity of intercalation compounds of TiNCl with aliphatic amines

“…In our recent study on the co-intercalation effect of solvent molecules on the superconductivity of K intercalated b-ZrNCl, K 0.26 ZrNCl, the basal spacing increases from 10.96 to 21.83 A upon cointercalation of propylene carbonate (PC). 37 Although the increase of the spacing (Dd) is as large as 10.87 A, the space group P 3m of K 0.26 ZrNCl is maintained in the co-intercalated compound K 0.26 (PC) y ZrNCl, and the T c is almost unchanged at 11.5 K. It has also been reported that the T c 's of Li and Na intercalated b-ZrNCl and b-HfNCl increased by 1.5-2 K upon co-intercalation of THF and PC. 38,39 Note that the expansion of the basal spacing by co-intercalation rather increases the T c .…”

Exploration of new superconductors and functional materials, and fabrication of superconducting tapes and wires of iron pnictides

“…In alkali metal ( A ) intercalated compounds, A atoms occupy the octahedral or trigonal prism sites between chlorine layers of β - M NCl [58, 311, 312]. The largest metal concentration attained is expected to be x = 0.5 for A x M NCl ( M = Zr, Hf).…”

Unconventional superconductivity in electron-doped layered metal nitride halides MNX (M= Ti, Zr, Hf; X= Cl, Br, I)

“…It has been reported that the stacking pattern of the layers Cl[M 2 N 2 ]Cl is changed upon intercalation of metals, leading to the change of the polytype from the SmSI (R3m) to the YOF type [30,31] and to the P3m stacking [32][33][34]. The changes depend on the kinds of the intercalated metals.…”