Effect of pressure on the quantum spin ladder material IPA-CuCl3

Abstract

Inelastic neutron scattering and bulk magnetic susceptibility studies of the quantum S=1/2 spin ladder system IPA-CuCl3 are performed under hydrostatic pressure. The pressure dependence of the spin gap $\Delta$ is determined. At $P=1.5$ GPa it is reduced to $\Delta =0.79$ meV from $\Delta =1.17$ meV at ambient pressure. The results allow us to predict a soft-mode quantum phase transition in this system at P${}_{\mathrm{c}}\sim 4$ GPa. The measurements are complicated by a proximity of a structural phase transition that leads to a deterioration of the sample.

5 pages, 4 figures

References in corpus (3)

• Bose-Einstein Condensation in Magnetic Insulators
• Quantum magnetism and criticality
• Quantum Magnets under Pressure: Controlling Elementary Excitations in TlCuCl3