Abstract
Using ultrahigh magnetic field up to 120 T, a 1/2 magnetization plateau within T and a 3/4-like plateau within T have been observed in the -1 skew chain antiferromagnet . By combining density functional theory calculations, exact diagonalization, and quantum Monte Carlo simulations, we find that the nearest-neighbor interchain interaction ( K) is much stronger than the intrachain interactions ( K and K), showing surprising “dimerization” of magnetic ions caused by the large -orbital overlap along the Ni1-Ni1 bond. Thus a “” model is proposed to describe the magnetization process—the 1/2 plateau pertains to weakly coupled Ni2 monomers while the 3/4-like plateau to the strongly coupled Ni1 dimers. The possible supersolid phases from the Ni1 dimers are proposed.
- Received 1 August 2022
- Accepted 24 October 2022
DOI:https://doi.org/10.1103/PhysRevB.106.184409
©2022 American Physical Society