Magnetoresistance and magnetic field induced metal–insulator transition in intercalated amorphous carbon
| Autor: | Latha Kumari, S.V. Subramanyam |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Materials science
Condensed matter physics Magnetoresistance Physics Mechanical Engineering Condensed Matter Physics Magnetic field Amorphous carbon Mechanics of Materials Electrical resistivity and conductivity General Materials Science Metal–insulator transition Temperature coefficient Pyrolysis Scaling |
| Zdroj: | Materials Science and Engineering: B. 129:48-53 |
| ISSN: | 0921-5107 |
| DOI: | 10.1016/j.mseb.2005.12.029 |
| Popis: | In this work, we discuss the preparation of iodine and sulfur incorporated amorphous carbon (a-C) films by vapor phase pyrolysis technique. Iodine incorporated a-C films depict an unusual resistivity behavior at low temperatures, where a clear positive temperature coefficient (PTCR) is witnessed, which also depicts a pyrolysis temperature and iodine incorporation induced metal–insulator (M–I) transition. Magnetic field induced M–I transition is also observed in iodinated samples. Magnetoresistance measurements performed on these films from 1.3–10 K in the presence of magnetic field (0–7 T) account for a positive magnetoresistance irrespective of the regimes they fall in. Universal scaling of magnetoconductance observed in intercalated a-C system depicts the dominance of electron–electron interaction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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