Unconventional charge-density wave in Sr3Ir4Sn13 cubic superconductor revealed by optical spectroscopy study
A. F. Fang, X. B. Wang, P. Zheng, N. L. Wang
DOI 10.1103/PhysRevB.90.035115 · Physical Review B
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Abstract
Sr3Ir4Sn13 is an interesting compound showing the coexistence of structural phase transition and superconductivity. The structural phase transition at 147 K leads to the formation of a superlattice. We perform optical spectroscopy measurements across the structural phase transition on single-crystal samples of Sr3Ir4Sn13. The optical spectroscopy study reveals an unusual temperature-induced spectral weight transfer over a broad energy scale, yielding evidence for the presence of electron correlation effects. Below the structural phase transition temperature an energy gap-like suppression in optical conductivity was observed, leading to the removal of partial itinerant carriers near the Fermi level. Unexpectedly, the suppression appears at a much higher energy scale than expected for the usual charge-density-wave phase transition.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr3Ir4Sn13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | onset |
| Sr3Ir4Sn13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | onset |
| Sr3Ir4Sn13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | onset |
| Ca3Ir4Sn13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7 | Pressure not reported | unknown |
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