Signature of superconductivity in pressurized La4Ni3O10-x single crystals grown at ambient pressure

Abstract

Nickelates have attracted enormous attention since the discovery of high-temperature superconductivity in La3Ni2O7 under high pressure. However, whether superconducting nickelate single crystals can be prepared at ambient pressure remains elusive. Here we report signature of superconductivity in pressurized La4Ni3O10-x single crystals grown from potassium carbonate flux at ambient pressure. Single crystal X-ray diffraction and scanning transmission electron microscopy investigations re-vealed high-quality single crystals with perfect stacking of trilayers. Resistivity measurements indicate that the metal-to-metal transition observed at ambient pressure was suppressed under high pressure, and a sharp drop occurred at ~30 K at 77.9 GPa, consistent with superconductivity in pressurized La4Ni3O10 single crystals grown by the floating zone method at an oxygen pressure of >18 bar. Our results not only provide an important path to prepare high-quality nickelate single crystals but also support superconductivity in nickelates under high pressure, promoting more systematic and in-depth research in this compelling field.

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Cited by in corpus (3)

• Bulk superconductivity up to 96 K in pressurized nickelate single crystals
• Damage of bilayer structure in La3Ni2O7-d induced by high pO2 annealing
• Intertwined Charge and Spin Density Waves in Trilayer Nickelate La${}_4$Ni${}_3$O${}_{10}$ Revealed by ${}^{139}$La NQR