Superconductivity in the noncentrosymmetric compound Re6Hf
Bin Chen, Yang Guo, Hangdong Wang, Qiping Su, Qianhui Mao, Jianhua Du, Yuxing Zhou, Jinhu Yang, Minghu Fang
DOI 10.1103/PhysRevB.94.024518 · Physical Review B
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Abstract
Re6Hf, which crystallizes in α-Mn structure(space group I4¯3m) without a spatial inversion center, is a superconductor with a superconducting transition temperature Tc≈6.2K. The measurements of magnetic susceptibility (χ), resistivity (ρ), and specific heat capacity (C) were carried out. Bulk superconductivity is revealed by the jump at Tc of the specific heat with ΔC/γnTc≈1.63, suggesting moderate electron-electron coupling strength in this system. The upper critical field μ0Hc2WHH(0) was estimated to be of 89 kOe, and μ0Hc2GL(0)=107 kOe, which is close to the Pauli limiting field. The Ginzburg Landau parameter κGL=50.2, indicates that Re6Hf is a type-II superconductor. The temperature dependence of the electronic specific heat Cel(T) in the superconducting state can be explained by BCS theory. Furthermore, the magnetic-field dependence of γ(H) is found to be linear with respect to H. These results imply a dominant s-wave superconductivity in Re6Hf.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Re6Hf Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.2 | Pressure not reported | onset |
| Re6Hf Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.4 | Pressure not reported | onset |
| Re6Hf Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.2 | Pressure not reported | zero_resistance |
| Re6Hf Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.2 | Pressure not reported | midpoint |
| Re24Ti5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.8 | Pressure not reported | unknown |
| Re0.86Hf0.14 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.86 | Pressure not reported | unknown |
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