Pressure-Induced Quantum Critical and Multicritical Points in a Frustrated Spin Liquid

The quantum spin-liquid compound (C sub(4)H sub(12)N sub(2)) Cu sub(2)Cl sub(6) is studied by muon spin relaxation 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 sub(c) ~ 4.3 kbar. An a...

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Published in:Physical review letters 2014-02, Vol.112 (8), Article 087204
Main Authors: Thede, M., Mannig, A., Månsson, M., Hüvonen, D., Khasanov, R., Morenzoni, E., Zheludev, A.
Format: Article
Language:English
Subjects:
Critical point
Hydrostatic pressure
Muon spin relaxation
Phase diagrams
Phase transformations
Spin liquid
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description The quantum spin-liquid compound (C sub(4)H sub(12)N sub(2)) Cu sub(2)Cl sub(6) is studied by muon spin relaxation 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 sub(c) ~ 4.3 kbar. An additional phase transition to a different ordered phase is observed at P sub(1) ~ 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 sub(1), T sub(1) = 2.0 K.
doi_str_mv 10.1103/PhysRevLett.112.087204
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subjects Critical point
Hydrostatic pressure
Muon spin relaxation
Phase diagrams
Phase transformations
Spin liquid
title Pressure-Induced Quantum Critical and Multicritical Points in a Frustrated Spin Liquid
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