The incarnation of the Nersesyan-Tsvelik model in (NO)[Cu(NO3)3]

TL;DR

This paper investigates (NO)[Cu(NO3)3], a material that potentially realizes the Nersesyan-Tsvelik model, and finds no evidence of long-range magnetic order, supporting its characterization as a low-dimensional spin-1/2 system.

Contribution

It demonstrates that (NO)[Cu(NO3)3] exhibits properties consistent with the Nersesyan-Tsvelik model, providing experimental insights into its ground state.

Findings

No long-range magnetic order observed down to 1.8 K

Behavior consistent with low-dimensional spin-1/2 systems

Supports the realization of the Nersesyan-Tsvelik model in this material

Abstract

The topology of the magnetic interactions of the copper spins in the nitrosonium nitratocuprate (NO)[Cu(NO3)3] suggests that it could be a realization of the Nersesyan-Tsvelik model, whose ground state was argued to be either a resonating valence bond (RVB) state or a valence bond crystal (VBC). The measurement of thermodynamic and resonant properties reveals a behavior inherent to low dimensional spin S = 1/2 systems and provides indeed no evidence for the formation of long-range magnetic order down to 1.8 K.