Structure and superconductivity in pyrite Ir0.95−xRhxTe2: A comparison with analogous selenides
Jiangang Guo, Yanpeng Qi, Hideo Hosono
DOI 10.1103/PhysRevB.87.224504 · Physical Review B
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Abstract
We report the structural and superconducting evolution of the solid solution of Ir0.95−xRhxTe2 (0≤x≤0.52) and compare the results with those of analogous selenides. The structural analysis revealed that the unit cell unexpectedly expands and the separation of the Te2−2 dimer exhibits a maximal value of around x=0.2 with increasing Rh content. However, unlike the domed Tc in Ir0.94−xRhxTe2, the present system exhibits a monotonous decrease in Tc, which is independent of the instability of the Te2−2 dimer. As the analysis of resistivity and heat capacity, it is suggested that electron-electron/phonon correlation strength is a considerable factor leading to the different evolution of Tc in the vicinity of the structural instability state of pyrite superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ir0.95-xRhxTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ir0.43Rh0.52Te2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.4 | Pressure not reported | zero_resistance |
| RhTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.3 | Pressure not reported | unknown |
| Ir0.75Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.4 | Pressure not reported | unknown |
| Ir0.58Rh0.36Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.6 | Pressure not reported | unknown |
| Ir0.75Te2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.8 | Pressure not reported | unknown |
| Ir0.93Te2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.7 | Pressure not reported | unknown |
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