| Autor: |
A, Seiler, P, Piekarz, S, Ibrahimkutty, D G, Merkel, O, Waller, R, Pradip, A I, Chumakov, R, Rüffer, T, Baumbach, K, Parlinski, M, Fiederle, S, Stankov |
| Rok vydání: |
2016 |
| Zdroj: |
Physical review letters. 117(27) |
| ISSN: |
1079-7114 |
| Popis: |
We report a systematic lattice dynamics study of EuSi_{2} films and nanoislands by in situ nuclear inelastic scattering on ^{151}Eu and ab initio theory. The Eu-partial phonon density of states of the nanoislands exhibits anomalous excess of phonon states at low and high energies, not present in the bulk and at the EuSi_{2}(001) surface. We demonstrate that atomic vibrations along the island-substrate interface give rise to phonon states both at low and high energies, while atomic vibrations across the island-island interface result in localized high-energy phonon modes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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