Scanning Tunneling Spectroscopy of Proximity Superconductivity in Epitaxial Multilayer Graphene
We report on spatial measurements of the superconducting proximity effect in epitaxial graphene induced by a graphene-superconductor interface. Superconducting aluminum films were grown on epitaxial multilayer graphene on SiC. The aluminum films were discontinuous with networks of trenches in the fi...
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| Veröffentlicht in: | Physical review. B 2016-01, Vol.93 (4), Article 045406 |
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| container_title | Physical review. B |
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| creator | Natterer, Fabian D Ha, Jeonghoon Baek, Hongwoo Zhang, Duming Cullen, William Zhitenev, Nikolai B Kuk, Young Stroscio, Joseph A |
| description | We report on spatial measurements of the superconducting proximity effect in epitaxial graphene induced by a graphene-superconductor interface. Superconducting aluminum films were grown on epitaxial multilayer graphene on SiC. The aluminum films were discontinuous with networks of trenches in the film morphology reaching down to exposed graphene terraces. Scanning tunneling spectra measured on the graphene terraces show a clear decay of the superconducting energy gap with increasing separation from the graphene-aluminum edges. The spectra were well described by Bardeen-Cooper-Schrieffer (BCS) theory. The decay length for the superconducting energy gap in graphene was determined to be greater than 400 nm. Deviations in the exponentially decaying energy gap were also observed on a much smaller length scale of tens of nanometers. |
| doi_str_mv | 10.1103/physrevb.93.045406 |
| format | Article |
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Superconducting aluminum films were grown on epitaxial multilayer graphene on SiC. The aluminum films were discontinuous with networks of trenches in the film morphology reaching down to exposed graphene terraces. Scanning tunneling spectra measured on the graphene terraces show a clear decay of the superconducting energy gap with increasing separation from the graphene-aluminum edges. The spectra were well described by Bardeen-Cooper-Schrieffer (BCS) theory. The decay length for the superconducting energy gap in graphene was determined to be greater than 400 nm. 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Deviations in the exponentially decaying energy gap were also observed on a much smaller length scale of tens of nanometers.</description><subject>Aluminum</subject><subject>Decomposition</subject><subject>Energy gap</subject><subject>Epitaxy</subject><subject>Graphene</subject><subject>Multilayers</subject><subject>Spectra</subject><subject>Superconductivity</subject><issn>2469-9950</issn><issn>2469-9969</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqNkU1P3DAQhq2KqqCFP8ChyrGXXcYfcexLpYIoIIFAXThbjjNhXWXt4CQr8u-b1cKq3DjNaOadVzPzEHJKYUEp8LN2NXYJN-VC8wWIXID8Qo6YkHqutdQH-zyHQ3LSdX8BgErQBehv5JAVoBTl4oiYpbMh-PCcPQ4hYLPNli26PsXOxXbMYp09pPjq174fs-XQYnIxVIPr_WZb8SG7bH1vX71tsruh6X1jR0zZVbLtCgMek6-1bTo8eYsz8vT78vHien57f3Vz8et27nKg_dwqqAQKrRmvqOW2Kl0NSqCqndQoSzvdLDgAloUuFHe1Y4oBrwtZFTUHyWfk5863Hco1Vg5Dn2xj2uTXNo0mWm8-doJfmee4MUJxJlg-Gfx4M0jxZcCuN2vfOWwaGzAOnaGKSVkwpeQnpKBA5jBZzwjbSd30z4lXvd-IgtlyNA8Txz-4OTeamx3Haej7_7fsR96p8X_oQJ3m</recordid><startdate>20160107</startdate><enddate>20160107</enddate><creator>Natterer, Fabian D</creator><creator>Ha, Jeonghoon</creator><creator>Baek, Hongwoo</creator><creator>Zhang, Duming</creator><creator>Cullen, William</creator><creator>Zhitenev, Nikolai B</creator><creator>Kuk, Young</creator><creator>Stroscio, Joseph A</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>H8D</scope><scope>JG9</scope><scope>L7M</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20160107</creationdate><title>Scanning Tunneling Spectroscopy of Proximity Superconductivity in Epitaxial Multilayer Graphene</title><author>Natterer, Fabian D ; Ha, Jeonghoon ; Baek, Hongwoo ; Zhang, Duming ; Cullen, William ; Zhitenev, Nikolai B ; Kuk, Young ; Stroscio, Joseph A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c501t-a80d4e49923d1a3adbcf084e8fc69e6ba1104300eb79783cfc28203f76d7f3063</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Aluminum</topic><topic>Decomposition</topic><topic>Energy gap</topic><topic>Epitaxy</topic><topic>Graphene</topic><topic>Multilayers</topic><topic>Spectra</topic><topic>Superconductivity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Natterer, Fabian D</creatorcontrib><creatorcontrib>Ha, Jeonghoon</creatorcontrib><creatorcontrib>Baek, Hongwoo</creatorcontrib><creatorcontrib>Zhang, Duming</creatorcontrib><creatorcontrib>Cullen, William</creatorcontrib><creatorcontrib>Zhitenev, Nikolai B</creatorcontrib><creatorcontrib>Kuk, Young</creatorcontrib><creatorcontrib>Stroscio, Joseph A</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Physical review. 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| source | American Physical Society Journals |
| subjects | Aluminum Decomposition Energy gap Epitaxy Graphene Multilayers Spectra Superconductivity |
| title | Scanning Tunneling Spectroscopy of Proximity Superconductivity in Epitaxial Multilayer Graphene |
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