| Popis: |
The properties of a particular Van Hove singularity in the electron energy bands of iron have been studied theoretically. Its presence in iron bands may explain the anomaly in the isomer shift of iron near ${T}_{c}$ discovered by Preston, Hanna, and Heberle some time ago. To date, no satisfactory theory has been given for this anomaly. The explanation offered here uses a newly calculated conduction-electron density of states and depends on a small (\ensuremath{\sim}10 mRy) band shift. In addition, the effects of the singularity on other electronic properties of iron are discussed. |
