Pressure-induced quantum critical and multicritical points in a frustrated spin liquid

Abstract

The quantum spin liquid compound (C${}_4$H${}_{12}$N${}_2$)Cu${}_2$Cl${}_6$ (PHCC) is studied by $\mu$SR under hydrostatic pressures up to 23.6 kbar. At low temperatures, pressure-induced incommensurate magnetic order is detected beyond a quantum critical point at $P_c\sim 4.3$ kbar. An additional phase transition to a different ordered phase is observed at $P_1\sim 13.4$ kbar. The data indicate that the high-pressure phase may be a commensurate one. The established $(P-T)$ phase diagram reveals the corresponding pressure-induced multicritical point at $P_1$, $T_1=2.0$ K.

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• Phonon-modulated magnetic interactions and spin Tomonaga-Luttinger liquid in the p-orbital antiferromagnet CsO2
• Spin dynamics in pressure-induced magnetically-ordered phases in PHCC
• Quantum criticality in a three dimensional spin system at zero field and pressure
• Chemical composition induced quantum phase transition in Cs${}_{1-x}$Rb${}_x$FeCl${}_3$
• High pressure Raman study of the quantum magnet (C${}_4$H${}_{12}$N${}_2$)Cu${}_2$Cl${}_6$
• Spin waves near the edge of halogen substitution induced magnetic order in Ni(Cl${}_{1-x}$Br${}_x$)${}_2$$\cdot$4SC(NH${}_2$)${}_2$
• Effect of disorder on a pressure-induced $z=1$ magnetic quantum phase transition
• Magnetic phases and zone-folded phonons in a frustrated van der Waals magnet
• Asymmetric phase diagram and dimensional crossover in a system of spin-1/2 dimers under applied hydrostatic pressure
• Pressure-tuned quantum criticality in the large-$D$ antiferromagnet DTN
• Magnetic resonance of collective paramagnets with gapped excitations spectrum
• Magnetic nature of wolframite MgReO${}_4$
• Formation of the S=1 paramagnetic centers in the bond-diluted spin-gap magnet
• Magnetization process of a quasi-two-dimensional quantum magnet: Two-step symmetry restoration and dimensional reduction
• One-dimensional physics of the frustrated quantum magnet PHCC
• Finite-temperature dynamics and the role of disorder in nearly critical Ni(Cl${}_{1-x}$Br${}_x$)${}_2$$\cdot$4SC(NH${}_2$)${}_2$
• Magnetic-field-induced magnon portfolio in a van der Waals magnet
• Magnetic Properties of Multifunctional ${}^7$LiFePO${}_4$ under Hydrostatic Pressure