Abstract
The first direct observation of electric monopole transitions in solids is reported for tetracyanoquinodimethane using an inelastic electron scattering experiment. Good agreement is obtained with a semiempirical self-consistent molecular-orbital calculation which predicts dipole allowed transitions near 3 and 7 eV and optically forbidden monopole transitions near 5 eV. We find an anomalous momentum dependence in the shape of the first dipole transition, possible due to local field effects.
| Original language | English |
|---|---|
| Pages (from-to) | 210-213 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 36 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1976 |