Magnetic Excitations of the Spin Gap System TlCuCl${}_3$

A. Oosawa, T. Kato, H. Tanaka +3

TlCuCl${}_3$ has a singlet ground state with the excitation gap $\Delta =0.65$ meV. The magnetic excitations in TlCuCl${}_3$ have been investigated by means of neutron inelastic scattering e…