2008/09/08 by Tao Hong, V. O. Garlea, V. Ovidiu Garlea +10
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.78.224409
published as Phys. Rev. B 78, 224409 (2008) · 5 pages, 4 figures
arxiv created 2008/09/08 · openalex publication_date 2008/12/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Inelastic-neutron-scattering and bulk magnetic-susceptibility studies of the quantum S=1/2 spin ladder system (CH3)2CHNH3CuCl3 are performed under hydrostatic pressure. The pressure dependence of the spin gap \ensuremathΔ is determined. At P=1500 MPa it is reduced to \ensuremathΔ=0.79 meV from \ensuremathΔ=1.17 meV at ambient pressure. The results allow us to predict a soft-mode quantum phase transition in this system at Pc\ensuremath∼4 GPa. The measurements are complicated by the proximity of a structural phase transition that leads to a deterioration of the sample.