6533b862fe1ef96bd12c63fa
RESEARCH PRODUCT
Spectroscopic evidence for a new type of surface resonance at noble metal surfaces
Tobias EulBenjamin StadtmüllerBenjamin StadtmüllerHubert EbertMartin AeschlimannJürgen Braunsubject
Surface (mathematics)PhotocurrentCondensed Matter - Materials ScienceMaterials scienceGeneral Physics and AstronomyResonanceMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesType (model theory)engineering.materialMolecular physicsCrystalMomentumengineeringNoble metalExcitationdescription
We investigated the surface and bulk properties of the pristine (110) surface of silver using threshold photoemission by excitation with light of 5.9 eV. Using a momentum microscope, we identified two distinct transitions along the $\overline{\mathrm{\ensuremath{\Gamma}}}\overline{\mathrm{Y}}$ direction of the crystal. The first one is a so far unknown surface resonance of the (110) noble-metal surface, exhibiting an exceptionally large bulk character that has so far been elusive in surface sensitive experiments. The second one stems from the well-known bulklike Mahan cone oriented along the $\mathrm{\ensuremath{\Gamma}}L$ direction inside the crystal but projected onto the (110)-surface cut. The existence of the new state is confirmed by photocurrent calculations, and its character is analyzed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-07-08 |