Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 15: Frustrated Magnets - General 2 (joint session TT/MA)

TT 15.4: Vortrag

Montag, 16. März 2020, 15:45–16:00, HSZ 304

Nematic correlations in the coupled J1-J2 chains — •Clio Efthimia Agrapidis¹, Stefan-Ludwig Drechsler², and Satoshi Nishimoto^1,3 — ¹Faculty of Physics, University of Warsaw — ²Institute for theoretical solid state physics, IFW Dresden — ³Department of Physics, Technical University Dresden

It is known that the ferromagnetic frustrated J₁-J₂ chain is a good minimal model for several cuprate chain materials. Moreover, this model exhibits multipolar physics in magnetic field. Motivated by this, we study antiferromagnetically coupled J₁-J₂ chains: the interchain coupling J′ is considered to vary from pure Ising to Heisenberg exchange by varying the XXZ anisotropy parameter Δ. In general, the interchain coupling can act as an effective magnetic field. When J′ is Ising-like, the system exhibits a fully magnetised state for J′/|J₁|>1. This magnetisation might be related to the existence of a nematic state. Remarkably, the system shows finite magnetisation also in the limit of Heisenberg interchain coupling.