Observation of new magnetic ground state in frustrated quantum antiferromagnet spin liquid system Cs2CuCl4

TL;DR

This study reports the discovery of a new metastable magnetic phase in Cs2CuCl4 induced by hydrostatic pressure, revealing a novel ordered magnetic state with a transition at 9 K while maintaining the original crystal structure.

Contribution

It demonstrates the induction of a new magnetic ground state in Cs2CuCl4 through pressure, expanding understanding of magnetic phase control in frustrated quantum antiferromagnets.

Findings

New metastable magnetic phase observed at 9 K transition temperature

Sample retains original crystal structure after pressure treatment

Pressure induces a magnetic state distinct from the quantum spin liquid phase

Abstract

Cs2CuCl4 is known to possess a quantum spin liquid phase with antiferromagnetic interaction below 2.8 K. We report the observation of a new metastable magnetic phase of the triangular frustrated quantum spin system Cs2CuCl4 induced by the application of hydrostatic pressure. We measured the magnetic properties of Cs2CuCl4 following the application and release of pressure after 3 days. We observed a previously unknown ordered magnetic phase with a transition temperature of 9 K. Furthermore, the recovered sample with new magnetic ground state possesses an equivalent crystal structure to the uncompressed one with antiferromagnetic quantum spin liquid phase.