Is La3Ni2O6.5 a Bulk Superconducting Nickelate?

Ran Gao; Lun Jin; Shuyuan Huyan; Danrui Ni; Haozhe Wang; Xianghan Xu; Sergey L. Bud’ko; Paul Canfield; Weiwei Xie; Robert J. Cava

doi:10.1021/acsami.3c17376

Is La₃Ni₂O_6.5 a Bulk Superconducting Nickelate?

Ran Gao, Lun Jin, Shuyuan Huyan, Danrui Ni, Haozhe Wang, Xianghan Xu, Sergey L. Bud’ko, Paul Canfield, Weiwei Xie, Robert J. Cava

Research output: Contribution to journal › Review article › peer-review

Abstract

Superconducting states onsetting at moderately high temperatures have been observed in epitaxially stabilized RENiO₂-based thin films. However, recently, it has also been reported that superconductivity at high temperatures is observed in bulk La₃Ni₂O_7-δ at high pressure, opening further possibilities for study. Here we report the reduction profile of La₃Ni₂O₇ in a stream of 5% H₂/Ar gas and the isolation of the metastable intermediate phase La₃Ni₂O_6.45, which is based on Ni²⁺. Although this reduced phase does not superconduct at ambient or high pressures, it offers insights into the Ni-327 system and encourages future study of nickelates as a function of oxygen content.

Original language	English (US)
Journal	ACS Applied Materials and Interfaces
DOIs	https://doi.org/10.1021/acsami.3c17376
State	Accepted/In press - 2023

All Science Journal Classification (ASJC) codes

General Materials Science

Keywords

High pressure
nickelates
superconductivity

Access to Document

10.1021/acsami.3c17376

Cite this

@article{2821638c703d44b08ab41568fc9e2086,

title = "Is La3Ni2O6.5 a Bulk Superconducting Nickelate?",

abstract = "Superconducting states onsetting at moderately high temperatures have been observed in epitaxially stabilized RENiO2-based thin films. However, recently, it has also been reported that superconductivity at high temperatures is observed in bulk La3Ni2O7-δ at high pressure, opening further possibilities for study. Here we report the reduction profile of La3Ni2O7 in a stream of 5% H2/Ar gas and the isolation of the metastable intermediate phase La3Ni2O6.45, which is based on Ni2+. Although this reduced phase does not superconduct at ambient or high pressures, it offers insights into the Ni-327 system and encourages future study of nickelates as a function of oxygen content.",

keywords = "High pressure, nickelates, superconductivity",

author = "Ran Gao and Lun Jin and Shuyuan Huyan and Danrui Ni and Haozhe Wang and Xianghan Xu and Bud{\textquoteright}ko, {Sergey L.} and Paul Canfield and Weiwei Xie and Cava, {Robert J.}",

note = "Publisher Copyright: {\textcopyright} 2024 American Chemical Society.",

year = "2023",

doi = "10.1021/acsami.3c17376",

language = "English (US)",

journal = "ACS Applied Materials and Interfaces",