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arXiv · 2002.09327

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

M. Naseska·P. Sutar·D. Vengust·S. Tsuchiya·M. Čeh·D. Mihailovic·T. Mertelj
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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.

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M. Naseska, P. Sutar, D. Vengust, S. Tsuchiya, M. Čeh, D. Mihailovic, T. Mertelj. 2020-02-21. Orbitally-driven insulator-metal transition in CuIr$_2$S$_4$: Temperature dependent transient reflectivity study. https://doi.org/10.1103/physrevb.101.165134

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