Effect of pressure on structural and electronic properties of the noncentrosymmetric superconductor Rh2Mo3N
Yonghui Zhou, Wensen Wei, Bowen Zhang, Yifang Yuan, Chunhua Chen, Xuliang Chen, Chao An, Ying Zhou, Hao Wu, Shuyang Wang, Mengyao Qi, Ranran Zhang, Changyong Park, Mingliang Tian, Zhaorong Yang
DOI 10.1103/PhysRevB.100.174516 · Physical Review B
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Abstract
Noncentrosymmetric molybdenum nitride Rh2Mo3N is a conventional s-wave superconductor at ambient pressure. Here we report the evolution of structural and electronic properties of Rh2Mo3N under high pressure. X-ray diffraction measurements reveal the stability of pristine β-Mn-type cubic structure up to 47.9 GPa, accompanied by the continuously enhanced distortion of Mo6N octahedra. Electronic transport experiments show the robustness of superconductivity under pressure, i.e., the superconducting transition temperature Tc varies only ∼0.7 K upon compression up to 38.5 GPa. Meanwhile, detailed analyses of both structural and transport results consistently reveal a critical pressure of ∼14.0 GPa. In agreement with the enhancement of octahedral distortion, the temperature dependence of upper critical magnetic field accords with a p-wave model at 22.0 GPa and an s-wave model at 6.0 GPa. These results suggest the emergence of novel superconductivity in the distorted Rh2Mo3N cubic phase under pressure, which could be attributed to the enhanced strength of antisymmetric spin-orbit coupling (ASOC) via pressure-modified local octahedral distortion. Our findings may shed light on the searching and understanding of unique triplet-pairing superconductivity in other inversion-broken superconductors with strong ASOC.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Rh2Mo3N Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.2 | Pressure unresolved | onset |
| Rh2Mo3N Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.2 | 2.1 GPa | onset |
| Rh2Mo3N Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.5 | 38.5 GPa | onset |
| Li2Pd3B Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Li2Pt3B Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure unresolved | unknown |
| CeRhSi3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| CeIrSi3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| UIr Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YPtBi 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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