TY - JOUR
T1 - STM study of Sr adsorption on Si(100) surface
AU - Bakhtizin, R. Z.
AU - Kishimoto, J.
AU - Hashizume, T.
AU - Sakurai, T.
N1 - Funding Information:
We are indebted to Prof. A.G. Naumovets for providing the Sr source. One of us (R.Z.B.) acknowledges the partial support from the International Science Foundation, Grant No. NYK000.
PY - 1996/3
Y1 - 1996/3
N2 - Reconstructed structures of strontium (Sr) on the Si(100)-2 × 1 surface annealed at high temperature have been investigated using ultra-high vacuum scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED) for metal coverages (θ) below one monolayer (ML). At very low coverages (θ ≤ 0.01 ML) Sr atoms adsorb as isolated atoms or small clusters. At submonolayer coverages of θ ≥ 0.12 ML we have observed the alkali-earth metal chains, even at room temperature, that run perpendicular to the substrate dimer rows. It is found that the Sr rows form areas of (2 × 3) order for coverages θ about 1/3 ML after annealing at 800 °C whereas a (1 × 3) phase grows on top of this with θ ≥ 1.0 ML coverage in good agreement with our LEED data. It was also observed that the (2 × 3) phase formation is critical to the Sr coverage and to the annealing temperature as well. The relationship between the (2 × 3) and (1 × 3) ordered structures has been investigated as a function of Sr coverage and annealing temperature.
AB - Reconstructed structures of strontium (Sr) on the Si(100)-2 × 1 surface annealed at high temperature have been investigated using ultra-high vacuum scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED) for metal coverages (θ) below one monolayer (ML). At very low coverages (θ ≤ 0.01 ML) Sr atoms adsorb as isolated atoms or small clusters. At submonolayer coverages of θ ≥ 0.12 ML we have observed the alkali-earth metal chains, even at room temperature, that run perpendicular to the substrate dimer rows. It is found that the Sr rows form areas of (2 × 3) order for coverages θ about 1/3 ML after annealing at 800 °C whereas a (1 × 3) phase grows on top of this with θ ≥ 1.0 ML coverage in good agreement with our LEED data. It was also observed that the (2 × 3) phase formation is critical to the Sr coverage and to the annealing temperature as well. The relationship between the (2 × 3) and (1 × 3) ordered structures has been investigated as a function of Sr coverage and annealing temperature.
UR - http://www.scopus.com/inward/record.url?scp=0030562649&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030562649&partnerID=8YFLogxK
U2 - 10.1016/0169-4332(95)00413-0
DO - 10.1016/0169-4332(95)00413-0
M3 - Article
AN - SCOPUS:0030562649
VL - 94-95
SP - 478
EP - 484
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -