Publications
Phonons in Iron: From the Bulk to an Epitaxial Monolayer
- Author(s)
- Svetoslav Stankov, Ralf Röhlsberger, Tomasz Slezak, Marcel Sladecek, Bogdan Sepiol, Gero Vogl, A Chumakov, Rudolf Rüffer, Nika Spiridis, J Lazewski, K Parlinski, Jozef Korecki
- Abstract
The confinement of materials in low-dimensional structures has significant impact on propagating
excitations like phonons. Using the isotope-specific 57Fe nuclear resonant vibrational spectroscopy we were able to determine elastic and thermodynamic properties of ultrathin Fe films on W(110). With decreasing thickness one observes a significant increase of the mean atomic displacement that goes along
with an enhancement of vibrational modes at low energies as compared to the bulk. The analysis reveals that these deviations result from atomic vibrations of the single atomic layers at the two boundaries of the film, while the atoms inside the films vibrate almost bulklike.
- Organisation(s)
- Dynamics of Condensed Systems
- External organisation(s)
- European Synchrotron Radiation Facility ESRF, Hamburger Synchrotronstahlungslabor HASYLAB , AGH University of Science and Technology, Polish Academy of Sciences (PAS)
- Journal
- Physical Review Letters
- Volume
- 99
- No. of pages
- 4
- ISSN
- 0031-9007
- DOI
- https://doi.org/10.1103/PhysRevLett.99.185501
- Publication date
- 2007
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 1030 Physics, Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/6745459e-7789-43da-9493-58eb85b343bb