Unusual dimerization and magnetization plateaus in S = 1 skew chain Ni2V2O7 observed at 120 T

J. J. Cao, Z. W. Ouyang, X. C. Liu, T. T. Xiao, Y. R. Song, J. F. Wang, Y. Ishii, X. G. Zhou, and Y. H. Matsuda
Phys. Rev. B 106, 184409 – Published 9 November 2022
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Abstract

Using ultrahigh magnetic field up to 120 T, a 1/2 magnetization plateau within 11.734.8 T and a 3/4-like plateau within 55.687.0 T have been observed in the S-1 skew chain antiferromagnet Ni2V2O7. By combining density functional theory calculations, exact diagonalization, and quantum Monte Carlo simulations, we find that the nearest-neighbor interchain interaction (J3/kB=78.5 K) is much stronger than the intrachain interactions (J1/kB=1.0 K and J2/kB=6.3 K), showing surprising “dimerization” of magnetic ions caused by the large 3d-orbital overlap along the Ni1-Ni1 bond. Thus a “dimer+monomer” 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.

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  • Received 1 August 2022
  • Accepted 24 October 2022

DOI:https://doi.org/10.1103/PhysRevB.106.184409

©2022 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

J. J. Cao1, Z. W. Ouyang1,*, X. C. Liu1, T. T. Xiao1, Y. R. Song1, J. F. Wang1,†, Y. Ishii2, X. G. Zhou2, and Y. H. Matsuda2,‡

  • 1Wuhan National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
  • 2Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan

  • *zwouyang@mail.hust.edu.cn
  • jfwang@hust.edu.cn
  • ymatsuda@issp.u-tokyo.ac.jp

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Issue

Vol. 106, Iss. 18 — 1 November 2022

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