Electronic Structure of Self-Assembled Ag Nanowires on Si(557): Spectroscopic Evidence for Dimensionality

Autor:	Nicholson, C.W., Monney, C., Krieg, U., Tegenkamp, Christoph, Pfnür, Herbert, Horn, K., Wolf, M.
Jazyk:	angličtina
Rok vydání:	2015
Předmět:	ddc:530 doping Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik vicinal Si surface dimensionality electronic structure 1D confining potential
Zdroj:	New Journal of Physics New Journal of Physics 17 (2015)
Popis:	We investigate the electronic structure of silver nanowires at 1 monolayer (ML) Ag coverage on a vicinal Si(557) substrate by angle-resolved photoemission spectroscopy. Fermi surface mapping reveals two-dimensional (2D) Ag-induced electron pockets, which shift to higher binding energies by n-type doping of the step edges. The electronic structure of the 1 ML Ag/Si(557) system exhibits additional 2D metallic states near the Fermi level, which may originate from substrate induced periodicities. By considering the confining potential and electronic coherence length we reconcile the seemingly conflicting views of the dimensionality in this system probed by photoemission spectroscopy, and the dispersion of collective excitations as detected by electron energy loss spectroscopy. DFG/FOR1700
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c43d6d468b0b2333a08294b80a09789 https://hdl.handle.net/11858/00-001M-0000-0028-34BF-511858/00-001M-0000-0028-F256-6 Zobrazit plný text záznamu