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

Journal Article · · Physical Review B

Inelastic-neutron-scattering and bulk magnetic-susceptibility studies of the quantum S = 1/2 spin ladder system (CH{sub 3}){sub 2}CHNH{sub 3}CuCl{sub 3} are performed under hydrostatic pressure. The pressure dependence of the spin gap {Delta} is determined. At P = 1500 MPa 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{sub c} {approx} 4 GPa. The measurements are complicated by the proximity of a structural phase transition that leads to a deterioration of the sample.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
DE-AC05-00OR22725
OSTI ID:
945347
Journal Information:
Physical Review B, Vol. 78, Issue 22
Country of Publication:
United States
Language:
English