Orbital degeneracy and Peierls instability in the triangular-lattice superconductor Ir1−xPtxTe2
Daiki Ootsuki, Yuki Wakisaka, Sunseng Pyon, Kazutaka Kudo, Minoru Nohara, Masashi Arita, Hiroaki Anzai, Hirofumi Namatame, Masaki Taniguchi, Naurang L. Saini, Takashi Mizokawa
DOI 10.1103/PhysRevB.86.014519 · Physical Review B
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Abstract
We have studied the electronic structure of the triangular lattice Ir1−xPtxTe2 superconductor using photoemission spectroscopy and model calculations. Ir 4f core-level photoemission spectra show that Ir 5d t2g charge modulation established in the low-temperature phase of IrTe2 is suppressed by Pt doping. This observation indicates that the suppression of charge modulation is related to the emergence of superconductivity. Valence-band photoemission spectra of IrTe2 suggest that the Ir 5d charge modulation is accompanied by Ir 5d orbital reconstruction. Based on the photoemission results and model calculations, we argue that the orbitally induced Peierls effect governs the charge and orbital instability in Ir1−xPtxTe2.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ir1-xPtxTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.1 | Pressure not reported | unknown |
| Ir1-xPtxTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.9 | Pressure not reported | unknown |
| LaFeAsO1-xFx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| FeSe1-xTex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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