Quantum well states in two-dimensional gold clusters on MgO thin films
The electronic structure of ultra-small Au clusters on thin MgO/Ag(001) films has been analyzed by scanning tunneling spectroscopy and density functional theory. The clusters exhibit two-dimensional (2D) quantum well states, whose shapes resemble the eigen-states of a 2D electron gas confined in a p...
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| creator | Lin, X Nilius, N H -J Freund Walter, M Frondelius, P Honkala, K H H/"akkinen |
| description | The electronic structure of ultra-small Au clusters on thin MgO/Ag(001) films has been analyzed by scanning tunneling spectroscopy and density functional theory. The clusters exhibit two-dimensional (2D) quantum well states, whose shapes resemble the eigen-states of a 2D electron gas confined in a parabolic potential. From the symmetries of the HOMO and LUMO of a particular cluster, its electron filling and charge state is determined. In accordance to a DFT Bader-charge analysis, aggregates containing up to twenty atoms accumulate one to four extra electrons due to a charge transfer from the MgO/Ag interface. The HOMO - LUMO gap is found to close for clusters containing between 70 and 100 atoms. |
| doi_str_mv | 10.48550/arxiv.0811.3812 |
| format | Article |
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The clusters exhibit two-dimensional (2D) quantum well states, whose shapes resemble the eigen-states of a 2D electron gas confined in a parabolic potential. From the symmetries of the HOMO and LUMO of a particular cluster, its electron filling and charge state is determined. In accordance to a DFT Bader-charge analysis, aggregates containing up to twenty atoms accumulate one to four extra electrons due to a charge transfer from the MgO/Ag interface. 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The HOMO - LUMO gap is found to close for clusters containing between 70 and 100 atoms.</description><subject>Charge transfer</subject><subject>Clusters</subject><subject>Density functional theory</subject><subject>Eigenvectors</subject><subject>Electron gas</subject><subject>Electronic structure</subject><subject>Gold</subject><subject>Magnesium oxide</subject><subject>Molecular orbitals</subject><subject>Physics - Materials Science</subject><subject>Quantum wells</subject><subject>Silver</subject><subject>Thin films</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GOX</sourceid><recordid>eNotz8FLwzAUx_EgCI65uycJeG59SZomPcpwOpgMYfeSpOnMSJvZpE7_ezvn6fHgyw8-CN0RyAvJOTyq4dt95SAJyZkk9ArNKGMkkwWlN2gR4wEAaCko52yGVu-j6tPY4ZP1Hsekko3Y9TidQta4zvbRhV55vA--wcaPMdkh4tDjt_0Wp4-pbJ3v4i26bpWPdvF_52i3et4tX7PN9mW9fNpkihORES5Yw6U2ygqrARSjLeVWmEqCMQL09FeV5KQ1JSsNVUprQ3VpWpBSFJrN0f1l9s9YHwfXqeGnPlvrs3UKHi7BcQifo42pPoRxmACxplNVEgAi2C_viFbk</recordid><startdate>20081124</startdate><enddate>20081124</enddate><creator>Lin, X</creator><creator>Nilius, N</creator><creator>H -J Freund</creator><creator>Walter, M</creator><creator>Frondelius, P</creator><creator>Honkala, K</creator><creator>H H/"akkinen</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20081124</creationdate><title>Quantum well states in two-dimensional gold clusters on MgO thin films</title><author>Lin, X ; Nilius, N ; H -J Freund ; Walter, M ; Frondelius, P ; Honkala, K ; H H/"akkinen</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a517-1573d58bcae7eb00a32f25e7c980cc70b32f99851fc636c2aabbc2b6cf08874b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Charge transfer</topic><topic>Clusters</topic><topic>Density functional theory</topic><topic>Eigenvectors</topic><topic>Electron gas</topic><topic>Electronic structure</topic><topic>Gold</topic><topic>Magnesium oxide</topic><topic>Molecular orbitals</topic><topic>Physics - Materials Science</topic><topic>Quantum wells</topic><topic>Silver</topic><topic>Thin films</topic><toplevel>online_resources</toplevel><creatorcontrib>Lin, X</creatorcontrib><creatorcontrib>Nilius, N</creatorcontrib><creatorcontrib>H -J Freund</creatorcontrib><creatorcontrib>Walter, M</creatorcontrib><creatorcontrib>Frondelius, P</creatorcontrib><creatorcontrib>Honkala, K</creatorcontrib><creatorcontrib>H H/"akkinen</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>arXiv.org</collection><jtitle>arXiv.org</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lin, X</au><au>Nilius, N</au><au>H -J Freund</au><au>Walter, M</au><au>Frondelius, P</au><au>Honkala, K</au><au>H H/"akkinen</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Quantum well states in two-dimensional gold clusters on MgO thin films</atitle><jtitle>arXiv.org</jtitle><date>2008-11-24</date><risdate>2008</risdate><eissn>2331-8422</eissn><abstract>The electronic structure of ultra-small Au clusters on thin MgO/Ag(001) films has been analyzed by scanning tunneling spectroscopy and density functional theory. The clusters exhibit two-dimensional (2D) quantum well states, whose shapes resemble the eigen-states of a 2D electron gas confined in a parabolic potential. From the symmetries of the HOMO and LUMO of a particular cluster, its electron filling and charge state is determined. In accordance to a DFT Bader-charge analysis, aggregates containing up to twenty atoms accumulate one to four extra electrons due to a charge transfer from the MgO/Ag interface. The HOMO - LUMO gap is found to close for clusters containing between 70 and 100 atoms.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.0811.3812</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Charge transfer Clusters Density functional theory Eigenvectors Electron gas Electronic structure Gold Magnesium oxide Molecular orbitals Physics - Materials Science Quantum wells Silver Thin films |
| title | Quantum well states in two-dimensional gold clusters on MgO thin films |
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