arXiv subjects

Ji-Hai Yuan

Publications and source records attributed to Ji-Hai Yuan.

2 recordsLinked to original sources

arXiv2025

Possible high-Tc superconductivity at 45 K in the Ge-doped cluster Mott insulator GaNb4Se8

The Ge-doped GaNb4Se8 polycrystalline samples were synthesized by solid-state reaction method. Zero resistance transitions were observed in one batch of samples with the highest onset superconducting Tc at 45 K. This discovery may demonstrate a new class of Nb-based high-Tc superconductors arising from doped Mott insulators.

cond-mat.supr-con↗

arXiv2025

Zero resistance when metals mixed with insulators

A false zero resistance behavior was observed during our study on the search of superconductivity in Ge-doped GaNb4Se8. This zero resistance was proved to be caused by open-circuit in multi-phase samples comprised of metals and insulators by measuring with four-probe method. The evidence strongly suggests that the reported superconductivity in hydrides should be carefully re-checked.

cond-mat.supr-con↗