Intrinsic properties of the 1313 phase and its influence on La3Ni2O7 superconductivity

Characterize the intrinsic electronic, magnetic, and superconducting properties of the alternating monolayer–trilayer (1313) phase of La3Ni2O7 and determine its influence on the superconducting behavior observed in bilayer La3Ni2O7, including whether high‑Tc signals arise from the 1313 phase or residual 327 inclusions.

Background

Recent studies report coexistence of an alternating monolayer–trilayer 1313 phase with the bilayer 327 structure. High‑pressure transport measurements have suggested possible high‑Tc signatures near 80 K, though the trilayer La4Ni3O10 itself exhibits lower Tc values.

The authors explicitly note that the intrinsic properties of the 1313 phase and its impact on superconductivity in 327 remain open questions, necessitating careful phase‑pure synthesis and definitive spectroscopic characterization.