Abstract
| Original language | English |
|---|---|
| Article number | 165419 |
| Pages (from-to) | 165419-1/9 |
| Number of pages | 9 |
| Journal | Physical Review B |
| Volume | 90 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - 15 Oct 2014 |
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Direct epitaxial growth of subsurfaces Co nanoclusters. / Siahaan, T.; Kurnosikov, O.; Swagten, H.J.M.; Koopmans, B.
In: Physical Review B, Vol. 90, No. 16, 165419, 15.10.2014, p. 165419-1/9.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Direct epitaxial growth of subsurfaces Co nanoclusters
AU - Siahaan, T.
AU - Kurnosikov, O.
AU - Swagten, H.J.M.
AU - Koopmans, B.
PY - 2014/10/15
Y1 - 2014/10/15
N2 - A new subsurface growth mode in the Co-Cu system is reported. This mode provides a direct subsurface growth of Co nanoclusters by depositing Co atoms on the Cu(001) surface in a single stage. The resulting subsurface Co nanoclusters are located 2 monolayers (ML) deep below the atomically flat surface of Cu(001). Although these hidden nanoclusters cannot be directly accessed by a scanning tunneling microscopy/spectroscopy (STM/STS) probe, their shape could be deduced using STM/STS via a careful analysis of the local deformation of the Cu(001) surface as well as local variations of surface electron density induced by the subsurface clusters. A strongly asymmetric shape of the nanoclusters is deduced: they are typically 5-10 nm in lateral size but only 2 to 3 ML in thickness. The thickness of the nanoclusters does not evolve significantly under a heat treatment. A simple model is implemented to describe the growth kinetics. The results in this study reveal that intense processes of diffusion, nucleation, and growth take place in a region 1 nm deep, thus defining the near-surface region.
AB - A new subsurface growth mode in the Co-Cu system is reported. This mode provides a direct subsurface growth of Co nanoclusters by depositing Co atoms on the Cu(001) surface in a single stage. The resulting subsurface Co nanoclusters are located 2 monolayers (ML) deep below the atomically flat surface of Cu(001). Although these hidden nanoclusters cannot be directly accessed by a scanning tunneling microscopy/spectroscopy (STM/STS) probe, their shape could be deduced using STM/STS via a careful analysis of the local deformation of the Cu(001) surface as well as local variations of surface electron density induced by the subsurface clusters. A strongly asymmetric shape of the nanoclusters is deduced: they are typically 5-10 nm in lateral size but only 2 to 3 ML in thickness. The thickness of the nanoclusters does not evolve significantly under a heat treatment. A simple model is implemented to describe the growth kinetics. The results in this study reveal that intense processes of diffusion, nucleation, and growth take place in a region 1 nm deep, thus defining the near-surface region.
U2 - 10.1103/PhysRevB.90.165419
DO - 10.1103/PhysRevB.90.165419
M3 - Article
VL - 90
SP - 165419-1/9
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 16
M1 - 165419
ER -