Pulsed laser deposition of Co and growth of CoSi2 on Si(111)

Löffler, Maria; Cordón, J; Weinelt, Martin; Ortega, J. E.; Fauster, Thomas

doi:10.1007/s00339-005-3374-2

Cited by 12 publications

(8 citation statements)

References 34 publications

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“…Here, two different structures are found. One shows a ffiffiffiffiffi 13 p surface phase, which has been observed by Löffler et al [5] (denoted as a phase with A type domain). It is found that the length of unit cell is 1.38 nm and its orientation is rotated by an angle of 13:9 relative to [1 12] direction in clockwise direction as illustrated in Fig.…”

Section: Resultsmentioning

confidence: 80%

Co-induced nano-structures on Si(111) surface

Cui

Xie

et al. 2008

Applied Surface Science

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The interaction of cobalt atoms with silicon (111) surface has been investigated by means of scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED). Besides the Co silicide islands, we have successfully distinguished two inequivalent Co-induced $\sqrt{13}\times\sqrt{13}$ reconstructions on Si (111) surface. Our high-resolution STM images provide some structural properties of the two different $\sqrt{13}\times\sqrt{13}$ derived phases. Both of the two phases seem to form islands with single domain. The new findings will help us to understand the early stage of Co silicide formations.Comment: 4pages 4figure

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Section: Resultsmentioning

confidence: 80%

Co-induced nano-structures on Si(111) surface

Cui

Xie

et al. 2008

Applied Surface Science

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“…The self-consistent cycle has been performed using RK max ¼ 4, 1-100 k-points in the first Brillouin zone, and the PBE 93 functional [8] was used for the exchange correlation potential. tions, as also pointed out by Löffler et al [4]. It appears that more and more CoSi 2 islands tend to grow when the Co amount is higher.…”

Section: Dft Calculationsmentioning

confidence: 55%

“…the nominal coverage for the ffiffiffi 7 p reconstruction, we believe that there are probably more than one Co atom per ffiffiffiffiffiffi 13 p cluster, as already pointed out by Löffler et al [4]. Moreover, we assume that the protrusions that appear on the dark clusters at positive and negative polarization correspond to Si atoms, as can be observed for the initial growth of Co-Si silicides [12], or the ffiffiffi 7 p reconstruction [3].…”

Section: Atomic Structurementioning

confidence: 79%

“…At very low Co deposition (below 0.1 monolayer (ML)) at room temperature (RT) followed by annealing at 900 K, the initial Si( 1 1 1)-ð7 Â 7Þ surface coexists with the so-called ''ring-cluster" (RC) structure, where each cluster corresponds to a single Co atom in a substitutional silicon position and centered under a six Si adatoms ring [3]. At higher Co deposit the RC structure starts to order in a ð ffiffiffi 7 p Â ffiffiffi 7 p ÞR19:1 arrangement which covers the whole surface at the nominal coverage of 1/7 ML [3,4]. Finally, with increasing Co coverage, both ð ffiffiffi 7 p Â ffiffiffi 7 p ÞR19:1 and ð ffiffiffiffiffiffi 13 p Â ffiffiffiffiffiffi 13 p ÞR13:9 domains coexist on the surface along with triangular flat 3D CoSi 2 silicide islands [4,5].…”

Section: Introductionmentioning

confidence: 97%

“…At higher Co deposit the RC structure starts to order in a ð ffiffiffi 7 p Â ffiffiffi 7 p ÞR19:1 arrangement which covers the whole surface at the nominal coverage of 1/7 ML [3,4]. Finally, with increasing Co coverage, both ð ffiffiffi 7 p Â ffiffiffi 7 p ÞR19:1 and ð ffiffiffiffiffiffi 13 p Â ffiffiffiffiffiffi 13 p ÞR13:9 domains coexist on the surface along with triangular flat 3D CoSi 2 silicide islands [4,5]. While the ð ffiffiffi 7 p Â ffiffiffi 7 p ÞR19:1 structure has been fully described [3], the atomic geometry of the ð ffiffiffiffiffiffi 13 p Â ffiffiffiffiffiffi 13 p ÞR13:9 reconstruction is still unknown.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

reconstruction of the Co–Si(111) surface investigated by high-resolution STM and DFT calculations

et al. 2010

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DFT characterization of nanostructured germanium surfaces induced by cobalt atoms

Stephan

Hanf

Wetzel

et al. 2013

Surf. Interface Anal.

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By deposition in ultra‐high vacuum of cobalt on a Ge(111)–c(2 × 8) surface, Mocking et al. obtained a bold13×bold13−R13.9° surface reconstruction. In the present paper, we analyse the related atomic structure, proposed by these authors, by means of density functional theory calculations. The surface presents ordered clusters that consist of six Ge atoms arranged in a triangle, lying above three Co atoms. The latter are located at substitutional positions within the top plane of the Ge(111) first bilayer. These clusters are similar to what is obtained on part of the Co‐induced Si(111) bold13×bold13−R13.9° surface. For this surface, the clusters are terminated either by six Si atoms or by one, two or three adatoms above the six Si atoms. As the Co–Ge clusters systematically display six protrusions in the scanning tunnelling microscopy measurements by Mocking et al., we investigated why Ge adatoms are not present. Comparison of the Gibbs energy, interatomic distances, as well as charge density indicates that Ge adatoms on top of Co‐Ge clusters are less stable than Si adatoms in the Co‐Si system. Copyright © 2013 John Wiley & Sons, Ltd.

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Pulsed laser deposition of Co and growth of CoSi2 on Si(111)

Cited by 12 publications

References 34 publications

Co-induced nano-structures on Si(111) surface

Co-induced nano-structures on Si(111) surface

reconstruction of the Co–Si(111) surface investigated by high-resolution STM and DFT calculations

DFT characterization of nanostructured germanium surfaces induced by cobalt atoms

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