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

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

2008-09-08

arxiv.org/abs/0809.1254v1

Phys. Rev. B 78, 224409 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.78.224409

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.

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