Orbitally-driven insulator-metal transition in CuIr${}_2$S${}_4$: Temperature dependent transient reflectivity study

Abstract

Ultrafast transient reflectivity across the unusual three-dimensional Peierls-like insulator-metal (IM) transition in CuIr_{2}S_{4} was measured as a function of temperature. The low-temperature insulating-phase transient response is dominated by broken-symmetry-induced coherent lattice oscillations that abruptly vanish at the IM transition. The coherent mode spectra are consistent with Raman spectra reported in literature. The origin of the broken-symmetry-induced is also briefly discussed.

References in corpus (8)

• Orbitally-driven Peierls state in spinels
• Spin singlet formation in MgTi${}_2$O${}_4$: evidence of a helical dimerization pattern
• X-ray-induced disordering of the dimerization pattern and apparent low-temperature enhancement of lattice symmetry in spinel CuIr${}_2$S${}_4$
• Optical study of the metal-insulator transition in CuIr${}_2$S${}_4$ crystals
• Magnetic frustration in iridium spinel compound CuIr${}_2$S${}_4$
• X-ray-induced electrical conduction in the insulating phase of thiospinel CuIr2S4
• In-gap state and effect of light illumination in CuIr${}_2$S${}_4$ probed by photoemission spectroscopy
• Evolution of coherent collective modes through consecutive CDW transitions in (PO${}_2$)${}_4$(WO${}_3$)${}_{12}$ mono-phosphate tungsten bronze

Cited by in corpus (2)

• Resolving Length Scale Dependent Transient Disorder Through an Ultrafast Phase Transition
• First-order kinetics bottleneck during photoinduced ultrafast insulator-metal transition in 3D orbitally-driven Peierls insulator CuIr${}_2$S${}_4$