Pressure-induced phase transition to a novel spin state in striped nickelates

TL;DR

This paper investigates how high pressure induces phase transitions in striped nickelates, revealing a new spin state and associated phonon excitation features through theoretical modeling.

Contribution

It introduces a theoretical prediction of a pressure-induced phase transition to a novel spin state in striped nickelates using self-consistent Hartree-Fock calculations.

Findings

Pressure induces a phase transition in striped nickelates.

A new spin state is predicted at high pressure.

Phonon excitations show characteristic changes at the transition.

Abstract

We analyze pressure effects on stripe states within a selfconsistent Hartree-Fock calculation for a model of a striped nickelates. The results show a transition induced by high pressure and predict possible new spin states. We describe characteristics in the phonon excitations at the predicted transition, based on a real-space random phase approximation.