Holmium electronic structure

In fig. 3.22 the data on holmium in two different directions and at two different temperatures are shown. The near parabolic shape for the data along the b axis indicates that there is more symmetry in the Fermi surface around the hexagonal axis. However, the surface is not spherical because the data deviate considerably from the free electron theory. The slight temperature dependence of the c axis data for Ho reflects the change in band structure and Fermi surface due to magnetic ordering. 

There are three experimental studies on HoO by Kaledin and Shenyavskaya (1981), Liu et al. (1984) and Linton and Liu (1988). The paper by Liu et al. (1984) provides a comprehensive table of known electronic states of HoO. The paper of Linton and Liu (1988) deals primarily with the rotational and hyperfine structure in holmium oxide. They have compared the observed and computed hyperfine constants of Xj 8.5, Xj 7.5 and Wj 6.5 /2 states of HoO. 

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