STS study of the local density of states in MgB2 thin films
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| Title: | STS study of the local density of states in MgB |
|---|---|
| Authors: | Giubileo, F.1 cucolo@sa.infn.it, Bobba, F.1, Roditchev, D.2, Cucolo, A.M.1 |
| Source: | Journal of Physics & Chemistry of Solids. Jan2006, Vol. 67 Issue 1-3, p357-359. 3p. |
| Subjects: | Thin films, Scanning tunneling microscopy, Solid state electronics, Magnetic fields |
| Abstract: | Abstract: We have performed an extensive Scanning Tunnelling Spectroscopy study on c-axis oriented MgB2 thin films. By approaching a mechanically etched Pt/Ir tip, we realized S–I–N vacuum junctions. Only the 3D energy gap was observed, appearing spatially homogeneous all over the sample surface. We also produced S–I–S junctions by capturing a small MgB2 grain as STM tip. In these cases, the tunnelling spectra showed four coherence peaks at energies ∼±4.7 and ∼±8.3meV. We finally investigated the magnetic field dependence of the double structures observed in the S–I–S configuration: a rapid reduction of the 3D energy gap Δ π at low fields was found, while the 2D energy gap Δ σ seems to be not strongly affected by magnetic fields up to 2.6T. [Copyright &y& Elsevier] |
| Copyright of Journal of Physics & Chemistry of Solids is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 20262661 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: STS study of the local density of states in MgB<subscript>2</subscript> thin films – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Giubileo%2C+F%2E%22">Giubileo, F.</searchLink><relatesTo>1</relatesTo><i> cucolo@sa.infn.it</i><br /><searchLink fieldCode="AR" term="%22Bobba%2C+F%2E%22">Bobba, F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Roditchev%2C+D%2E%22">Roditchev, D.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Cucolo%2C+A%2EM%2E%22">Cucolo, A.M.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Physics+%26+Chemistry+of+Solids%22">Journal of Physics & Chemistry of Solids</searchLink>. Jan2006, Vol. 67 Issue 1-3, p357-359. 3p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Thin+films%22">Thin films</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+tunneling+microscopy%22">Scanning tunneling microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Solid+state+electronics%22">Solid state electronics</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: We have performed an extensive Scanning Tunnelling Spectroscopy study on c-axis oriented MgB2 thin films. By approaching a mechanically etched Pt/Ir tip, we realized S–I–N vacuum junctions. Only the 3D energy gap was observed, appearing spatially homogeneous all over the sample surface. We also produced S–I–S junctions by capturing a small MgB2 grain as STM tip. In these cases, the tunnelling spectra showed four coherence peaks at energies ∼±4.7 and ∼±8.3meV. We finally investigated the magnetic field dependence of the double structures observed in the S–I–S configuration: a rapid reduction of the 3D energy gap Δ π at low fields was found, while the 2D energy gap Δ σ seems to be not strongly affected by magnetic fields up to 2.6T. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Physics & Chemistry of Solids is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.jpcs.2005.10.113 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 3 StartPage: 357 Subjects: – SubjectFull: Thin films Type: general – SubjectFull: Scanning tunneling microscopy Type: general – SubjectFull: Solid state electronics Type: general – SubjectFull: Magnetic fields Type: general Titles: – TitleFull: STS study of the local density of states in MgB2 thin films Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Giubileo, F. – PersonEntity: Name: NameFull: Bobba, F. – PersonEntity: Name: NameFull: Roditchev, D. – PersonEntity: Name: NameFull: Cucolo, A.M. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2006 Type: published Y: 2006 Identifiers: – Type: issn-print Value: 00223697 Numbering: – Type: volume Value: 67 – Type: issue Value: 1-3 Titles: – TitleFull: Journal of Physics & Chemistry of Solids Type: main |
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