Structure and electronic properties of dysprosium-silicide nanowires on vicinal Si(001)

Preinesberger, C.; Pruskil, G.; Becker, S. K.; Dähne, M.; Vyalikh, D. V.; Молодцов, С. Л.; Laubschat, C.; Schiller, Frederik

doi:10.1063/1.2032620

Cited by 51 publications

(46 citation statements)

References 21 publications

(16 reference statements)

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“…This result with a one-dimensional dispersion corresponds well to the model of separated wires and is in qualitative agreement with that obtained for the electronic ground states with angular resolved photoemission spectroscopy ͑ARPES͒. 18 Looking closer to these spectra, it is interesting to note that the half widths of the peaks is not continuously increasing as a function of q ʈ . If we assume a single loss peak in the dispersion along the wires, we observe an extraordinary increase in the FWHMs again for small q ʈ values ͑below 0.125 Å −1 ͒.…”

Section: Resultssupporting

confidence: 76%

“…The effective electron mass m ‫ء‬ = 0.5m e was taken from the average of the ARPES measurements. 18 This excitation energy is also close to the dispersionless small loss peak found in ͓011͔ direction and is thus also consistent with this model.…”

Section: Resultssupporting

confidence: 74%

“…18 corresponds exactly to the terrace width of 7.5a, whereas the thick wires have a width around 4 nm. 18 Most likely these DySi 2 wires have hexagonal structure with the c axis of the unit cell oriented along the surface but perpendicular to the wire direction, as found for thicker nanostructures on this surface. 19 For the submonolayer Dy range this means that Dy must go below the first Si layer with a local concentration around one monolayer.…”

Section: Resultsmentioning

confidence: 99%

“…These, according to the scanning tunnel microscope data of Ref. 18, are separated by more than 5 nm of nonmetallic interspace. Thus interaction between the metallic wires can be neglected.…”

Section: Resultsmentioning

confidence: 99%

“…18 According to Ref. 18, a surface band centered at the ⌫ and a split band 21 centered at J point cross the Fermi energy.…”

Section: Resultsmentioning

confidence: 99%

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One-dimensional plasmons in ultrathin metallic silicide wires of finite width

et al. 2010

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The acoustic dispersion of plasmons ͑PLs͒ in narrow ͑4 nm͒ and ultrathin ͑one unit cell͒ metallic DySi 2 wires, grown by self-assembly on vicinal Si͑100͒-͓011͔ 4°turns out to be unidirectional. We observed the lowest intersubband PL as well as the acoustic PL. These PLs are specific for narrow metallic strips of finite width. Our experimental and theoretical analysis suggests that only one of two electron pockets in the surface Brillouin zone makes a substantial contribution to the PLs because the other pocket has a much smaller conductive character due to a strong admixture of electronic states with d character.

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Section: Resultssupporting

confidence: 76%

Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…18 According to Ref. 18, a surface band centered at the ⌫ and a split band 21 centered at J point cross the Fermi energy.…”

Section: Resultsmentioning

confidence: 99%

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One-dimensional plasmons in ultrathin metallic silicide wires of finite width

et al. 2010

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Correlation of geometrical and electronic properties in metallic nanowires

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Tegenkamp

Czubanowski

et al. 2010

Physica Status Solidi (b)

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The structure on the atomic scale was found to be directly correlated with the electronic and transport properties of ultrathin metallic wires. We present examples of both self-organized and artificially structured nanowires in the system Pb/Si(557). We demonstrate that artificial structuring on the nanoscale allows identification and determination of the electrical transport properties of atomic size defects, using Si(557) as a quasiinsulating substrate and a Si double step in a monolayer high Pb nanowire as an example. One-dimensional (1D) properties with strong electron correlation and various instabilities in metallic chains or ribbons generated by metal adsorption of submonolayers on insulating substrates like Si(111) or Si(557) turn out to always be modified by the unavoidable coupling to 2D and 3D. The wealth of new and partly unexpected phenomena is exemplified here again in monolayers of Pb on Si(557), which forms wire-like arrays. We identify structural self-stabilization as the origin of 1D electronic transport and show that a new 1D state is generated by step decoration. Magnetoconductance measurements yield even deeper insight into mechanisms of electronic transport, as also exemplified in this specific system.

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