# Synthesis and superconductivity in yttrium-cerium hydrides at high pressures

Article · Liu-Cheng Chen, Tao Luo, Zi-Yu Cao, Philip Dalladay‐Simpson, Ge Huang, Di Peng, Lili Zhang, Federico Aiace Gorelli, Guo‐Hua Zhong, Hai‐Qing Lin, Xiao‐Jia Chen

- Archive id: doi:10.1038/s41467-024-46133-x
- Published: 2024-02-28
- Venue: Nature Communications
- DOI: https://doi.org/10.1038/s41467-024-46133-x
- PMID: 38418489
- Citations: 65
- Source URL: https://doi.org/10.1038/s41467-024-46133-x
- PDF: https://www.nature.com/articles/s41467-024-46133-x.pdf
- Provenance: openalex

## Abstract

Abstract Further increasing the critical temperature and/or decreasing the stabilized pressure are the general hopes for the hydride superconductors. Inspired by the low stabilized pressure associated with Ce 4 f electrons in superconducting cerium superhydride and the high critical temperature in yttrium superhydride, we carry out seven independent runs to synthesize yttrium-cerium alloy hydrides. The synthetic process is examined by the Raman scattering and X-ray diffraction measurements. The superconductivity is obtained from the observed zero-resistance state with the detected onset critical temperatures in the range of 97-141 K. The upper critical field towards 0 K at pressure of 124 GPa is determined to be between 56 and 78 T by extrapolation of the results of the electrical transport measurements at applied magnetic fields. The analysis of the structural data and theoretical calculations suggest that the phase of Y 0.5 Ce 0.5 H 9 in hexagonal structure with the space group of P 6 3 / m m c is stable in the studied pressure range. These results indicate that alloying superhydrides indeed can maintain relatively high critical temperature at relatively modest pressures accessible by laboratory conditions.

_Abstract reproduced under CC-BY (publisher license, via OpenAlex)._

Topics: [Superconducting Hydrides Under Pressure](https://space-kitty.com/topics/hydride-superconductors)

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