Publications by authors named "Stephen Julian"
Pressure-induced changes in the solid-state structures and transport properties of three oxobenzene-bridged bisdithiazolyl radicals 2 (R = H, F, Ph) over the range 0-15 GPa are described. All three materials experience compression of their π-stacked architecture, be it (i) 1D ABABAB π-stack (R = Ph), (ii) quasi-1D slipped π-stack (R = H), or (iii) 2D brick-wall π-stack (R = F). While R = H undergoes two structural phase transitions, neither of R = F, Ph display any phase change.
View Article and Find Full Text PDFArticle Synopsis
- The material Ca(2)RuO(4) is characterized as a spin-one Mott insulator under normal pressure, but transitions to a metallic ferromagnet with a Curie temperature of 28 K under high pressure conditions.
- At pressures between 90 and 140 kbar, it exhibits a significant drop in resistivity and ac susceptibility near 0.4 K when subjected to low magnetic fields, signaling potential changes in its electronic properties.
- These findings suggest that Ca(2)RuO(4) is weakly superconducting and exists on the verge of a quasi-2D ferromagnetic state, indicating a complex interplay of magnetic and superconducting behaviors.