Possible Peierls Distortion Through Re₂ Dimer Formation in the LaNiO₂-Type Nitrides LnReN₂ (Ln = Pr, Nd).

ABSTRACT: Nitride perovskites are a recently opened class of materials with a limited number of stable compounds. Notably, anion-vacancy-ordered materials such as LaNiO₂-type nitrides are rare despite useful properties such as superconductivity reported for analogous oxides. Here, we report the preparation of two LnReN₂ (Ln = Pr, Nd) materials with a distorted LaNiO₂-type structure at high-pressure, high-temperature conditions of a large volume press. Powder X-ray and neutron diffraction show that the orthorhombic distortion (o-LnReN₂) of the LaNiO₂-aristotype structure is caused by buckling of the ReN_4/2 layers through Re dimerization. Electronic structure analysis reveals that the o-LnReN₂ materials are composed of classi

SUBMITTER: Werhahn D 

PROVIDER: S-EPMC12851013 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature