Willers, T.; Hu, Z.; Hollmann, N.; Körner, P.O.; Gegner, J.; Burnus, T.; Fujiwara, H.; Tanaka, A.; Schmitz, D.; Hsieh, H.H.; Lin, H.J.; Chen, C.T.; Bauer, E.D.; Sarrao, J.L.; Goremychkin, E.; Koza, M.; Tjeng, L.H.; Severing, A.: Crystal-field and Kondo-scale investigations of CeMIn5 (M=Co, Ir, and Rh): A combined x-ray absorption and inelastic neutron scattering study. Physical Review B 81 (2010), p. 195114/1-10
10.1103/PhysRevB.81.195114
Open Access Version (externer Anbieter)
Abstract:
Linear-polarized soft-x-ray absorption (XAS) and inelastic neutron scattering (INS) experiments have been performed on Ce𝑀In5 with 𝑀=Rh, Ir, and Co to determine the crystal-field scheme and characteristic Kondo temperatures 𝑇∗ for the hybridization between 4𝑓 and conduction electrons. The ground-state wave functions are determined from the polarization-dependent soft-XAS data at the cerium 𝑀4,5 edge and the crystal-field splittings from INS. The characteristic temperature 𝑇∗ has been determined from the line widths of the neutron scattering data. We find that the quasielastic linewidths of the superconducting compounds CeCoIn5 and CeIrIn5 are comparable with the low-energy crystal-field splitting.