Direct observation of the energy gap generating the1∕3magnetization plateau in the spin-1∕2trimer chain compoundCu3(P2O6OD)2by inelastic neutron scattering measurements

Direct observation of the energy gap generating the1∕3magnetization plateau in the spin-1∕2trimer chain compoundCu3(P2O6OD)2by inelastic neutron scattering measurements