Core Concepts
Application of pressure effectively suppresses the spin–charge order in trilayer nickelate La4Ni3O10−δ single crystals, leading to the emergence of superconductivity with a maximum critical temperature of around 30 K.
Abstract
The researchers investigated the effects of pressure on the electronic properties of trilayer nickelate La4Ni3O10−δ single crystals. They found that applying pressure effectively suppresses the spin–charge order in this material, which in turn leads to the emergence of superconductivity with a maximum critical temperature (Tc) of around 30 K at 69.0 GPa.
The key highlights of the study are:
- DC susceptibility measurements confirmed the presence of bulk superconductivity with a volume fraction exceeding 80% below Tc.
- In the normal state, the material exhibits a "strange metal" behavior, characterized by a linear temperature-dependent resistance extending up to 300 K.
- The layer-dependent superconductivity observed in the nickelate material suggests a unique interlayer coupling mechanism, which sets it apart from the better-known copper-based superconductors (cuprates).
The findings provide important insights into the fundamental mechanisms underlying superconductivity and introduce a new material platform to explore the interplay between spin–charge order, flat band structures, interlayer coupling, strange metal behavior, and high-temperature superconductivity.
Stats
The maximum critical temperature (Tc) of superconductivity in the pressurized trilayer nickelate La4Ni3O10−δ single crystals is around 30 K at 69.0 GPa.
The superconducting volume fraction exceeds 80% below Tc, as confirmed by DC susceptibility measurements.
Quotes
"The application of pressure effectively suppresses the spin–charge order in trilayer nickelate La4Ni3O10−δ single crystals, leading to the emergence of superconductivity with a maximum critical temperature (Tc) of around 30 K at 69.0 GPa."
"The layer-dependent superconductivity observed hints at a unique interlayer coupling mechanism specific to nickelates, setting them apart from cuprates in this regard."