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arXiv · 2408.11387

Structural and Superconducting Properties in the Te-doped Spinel CuRh2Se4

Kuan Li·Lingyong Zeng·Longfu Li·Rui Chen·Peifeng Yu·Kangwang Wang·Chao Zhang·Zaichen Xiang·Huixia Luo
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Abstract

In this paper, we discuss the impact of tellurium (Te) doping on the spinel superconductor CuRh2Se4. We conducted a comprehensive evaluation of the structural and superconducting properties of the system using various techniques, including X-ray diffraction (XRD), resistivity, magnetization, and specific heat measurements. Based on our XRD analysis, we found that the spinel superconductor CuRh2Se4-xTex crystallizes in the space group Fd3m(227) with x in the region of 0 to 0.28, while the layered compound CuRh2Se4-xTex crystallizes in the space group P3m1 (164) with x in the region of 2.8 to 4.0. The upper critical magnetic field can be increased from 0.95(2) T for CuRh2Se4 to 3.44(1) T for CuRh2Se3.72Te0.28 by doping with elemental Te. However, the layered compound CuRh2Se4-xTex did not exhibit superconducting properties. Besides, the specific heat measurements of CuRh2Se4-xTex (x = 0, 0.1, 0.28) indicate that the Te element doping affects the electronic structure and interactions of the material and breaks the stability of the superconducting pairing, which leads to a decrease in the Tc. Finally, we show the electronic phase diagram of Tc with Te doping to summarise our findings.

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Kuan Li, Lingyong Zeng, Longfu Li, Rui Chen, Peifeng Yu, Kangwang Wang, Chao Zhang, Zaichen Xiang, Huixia Luo. 2024-08-21. Structural and Superconducting Properties in the Te-doped Spinel CuRh2Se4. https://arxiv.org/abs/2408.11387

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