Tunneling Density of States of Indium Oxide Films Through the Superconductor to Insulator Transition
2013
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- Autor(en) / Beteiligte
- Titel
- Tunneling Density of States of Indium Oxide Films Through the Superconductor to Insulator Transition
- Ist Teil von
- Journal of superconductivity and novel magnetism, 2013-05, Vol.26 (5), p.1473-1477
- Ort / Verlag
- Boston: Springer US
- Erscheinungsjahr
- 2013
- Quelle
- Alma/SFX Local Collection
- Beschreibungen/Notizen
- We present planar tunneling junction spectroscopy measurements on disordered amorphous indium oxide films on both sides of the superconductor–insulator transition. Our measurements directly reveal a superconducting gap in the insulating phase. The measured energy gap has the same energy scale on both sides of the transition. Unlike the case of granular films, the tunneling curves cannot be fitted to the BCS density of state expression, even when introducing a broadening parameter to account for nonthermal broadening sources. The results are consistent with the presence of superconducting islands of which superconducting properties depend on film disorder and on the carrier density of the superconducting material.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1557-1939eISSN: 1557-1947DOI: 10.1007/s10948-012-2051-xTitel-ID: cdi_proquest_miscellaneous_1429909703
- Format
- –
- Schlagworte
- Bcs theory and its development, Characterization and Evaluation of Materials, Condensed Matter Physics, Condensed matter: electronic structure, electrical, magnetic, and optical properties, Density of states, Disorders, Electron states, Energy gap, Exact sciences and technology, Indium oxides, Insulators, Islands, Magnetic Materials, Magnetism, Metal-insulator transitions and other electronic transitions, Original Paper, Physics, Physics and Astronomy, Strongly Correlated Systems, Superconducting materials (excluding high-tc compounds), Superconductivity, Theory and models of superconducting state, Tunneling