About: Tantalum induced butterfly-like clusters on Si (111)-7 x 7 surface: STM/STS study at low coverage

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The adsorption of the small amounts of Ta on Si (111)-7 7 surface is investigated using scanning tunneling microscopy and tunneling spectroscopy combined with first-principles density functional theory calculations. We find out that moderate annealing of the Ta covered surface results in the formation of clusters of the butterfly-like shape. The clusters are sporadically distributed over the surface and their density is metal coverage dependent. Filled and empty state STM images of the clusters differ strongly suggesting the existence of covalent bonds within the cluster. Tunneling spectroscopy measurements reveal small energy gap, showing semiconductor character. The cluster model is proposed and discussed based on theoretical calculations . Results show that Ta joins the family of adsorbates, forming magic clusters on Si(111)-7 7, but its magic cluster has the structural and electronic properties that are different from those reported before. The adsorption of the small amounts of Ta on Si (111)-7 7 surface is investigated using scanning tunneling microscopy and tunneling spectroscopy combined with first-principles density functional theory calculations. We find out that moderate annealing of the Ta covered surface results in the formation of clusters of the butterfly-like shape. The clusters are sporadically distributed over the surface and their density is metal coverage dependent. Filled and empty state STM images of the clusters differ strongly suggesting the existence of covalent bonds within the cluster. Tunneling spectroscopy measurements reveal small energy gap, showing semiconductor character. The cluster model is proposed and discussed based on theoretical calculations . Results show that Ta joins the family of adsorbates, forming magic clusters on Si(111)-7 7, but its magic cluster has the structural and electronic properties that are different from those reported before. (en)
Title	Tantalum induced butterfly-like clusters on Si (111)-7 x 7 surface: STM/STS study at low coverage Tantalum induced butterfly-like clusters on Si (111)-7 x 7 surface: STM/STS study at low coverage (en)
skos:prefLabel	Tantalum induced butterfly-like clusters on Si (111)-7 x 7 surface: STM/STS study at low coverage Tantalum induced butterfly-like clusters on Si (111)-7 x 7 surface: STM/STS study at low coverage (en)
skos:notation	RIV/68378271:_____/12:00389054!RIV13-AV0-68378271
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(IAA1010413), Z(AV0Z10100521)
http://linked.open...iv/cisloPeriodika	3-4
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Shukrynau, Pavel Cháb, Vladimír Švec, Martin Mutombo, Pingo
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	173255
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/12:00389054
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	tantalum; silicon; chemisorption; scanning tunneling microscopy; scanning tunneling spectroscopy (en)
http://linked.open.../riv/klicoveSlovo	scanning tunneling microscopy chemisorption silicon tantalum scanning tunneling spectroscopy
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[C6960836D8EC]
http://linked.open...i/riv/nazevZdroje	Surface Science
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Nanoscience and nanotechnology with scanning probe microscopes: from atomic processes to material properties
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	606
http://linked.open...iv/tvurceVysledku	Cháb, Vladimír Švec, Martin Mutombo, Pingo Hietschold, M. Shukrynau, Pavel
http://linked.open...ain/vavai/riv/wos	000300458600039
http://linked.open...n/vavai/riv/zamer	Physics and technology of nanostructures, surfaces and thin films
issn	0039-6028
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.susc.2011.10.017

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