Suppression of magnetic ordering in XXZ-type antiferromagnetic monolayer NiPS3

Abstract How a certain ground state of complex physical systems emerges, especially in two-dimensional materials, is a fundamental question in condensed-matter physics. A particularly interesting case is systems belonging to the class of XY Hamiltonian where the magnetic order parameter of conventional nature is unstable in two-dimensional materials leading to a Berezinskii−Kosterlitz−Thouless transition. Here, we report how the XXZ-type antiferromagnetic order of a magnetic van der Waals material, NiPS 3 , behaves upon reducing the thickness and ultimately becomes unstable in the monolayer limit. Our experimental data are consistent with the findings based on renormalization-group theory that at low…

• NR
  National Research Foundation

  Award: 2017R1A5A1014862
• MO
  Ministry of Science and ICT, South Korea

  Awards: NRF-2016R1A2B3008363, 2017R1A5A1014862