中国物理B ›› 2009, Vol. 18 ›› Issue (5): 1961-1967.doi: 10.1088/1674-1056/18/5/039
尹民1, 马崇庚2, 江莎2, 段昌奎2, 夏上达3
Ma Chong-Geng(马崇庚)a), Jiang Sha(江莎)a), Duan Chang-Kui(段昌奎)a)†, Yin Min(尹民)b), and Xia Shang-Da(夏上达)a)b)
摘要: The spin--orbit interaction of the 5d electron needs to be taken into account to give the proper energy structure for the 4fN-15d configuration of heavy lanthanide ions occupying a site with ligands forming an octahedron. This paper derives theoretical results for the energy structure by treating the t2 orbitals as quasi p orbitals and then using angular-momentum coupling techniques. An analytic expression for the electric dipole absorption line strengths between 4fN multiplets and 4fN-15d states is given in terms of various angular-momentum quantum numbers and re-coupling coefficients. The result is then applied to interpret the excitation spectrum of Cs2NaYF6:Er3+. The high-spin and low-spin states of Cs2NaYF6:Er3+ are discussed in terms of the wavefunctions obtained by using the developed theoretical model.
中图分类号: (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)