Magnetic-Field-Induced Soft-Mode Quantum Phase Transition in the High-Temperature SuperconductorLa1.855Sr0.145CuO4: An Inelastic Neutron-Scattering Study

Magnetic-Field-Induced Soft-Mode Quantum Phase Transition in the High-Temperature SuperconductorLa1.855Sr0.145CuO4: An Inelastic Neutron-Scattering Study