Magnetic-field induced superconductor-metal-insulator transitions in bismuth metal-graphite
| Autor: | Masatsugu Suzuki, Itsuko S. Suzuki, Jürgen Walter, Robert Lee |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Superconductivity
Materials science Condensed matter physics Magnetoresistance Condensed Matter - Superconductivity chemistry.chemical_element FOS: Physical sciences Electron Bismuth Metal Superconductivity (cond-mat.supr-con) chemistry Electrical resistivity and conductivity visual_art Phase (matter) visual_art.visual_art_medium Graphite |
| DOI: | 10.48550/arxiv.cond-mat/0308312 |
| Popis: | Bismuth-metal graphite (MG) has a unique layered structure where Bi nanoparticles are encapsulated between adjacent sheets of nanographites. The superconductivity below $T_{c}$ (= 2.48 K) is due to Bi nanoparticles. The Curie-like susceptibility below 30 K is due to conduction electrons localized near zigzag edges of nanographites. A magnetic-field induced transition from metallic to semiconductor-like phase is observed in the in-plane resistivity $\rho_{a}$ around $H_{c}$ ($\approx$ 25 kOe) for both $H$$\perp$$c$ and $H$$\parallel$$c$ ($c$: c axis). A negative magnetoresistance in $\rho_{a}$ for $H$$\perp$$c$ (0$$ 40 kOe) suggest the occurrence of two-dimensional weak localization effect. Comment: 9 pages, 9 figures; published in Phys. Rev. B 66, 014533 (2002) |
| Databáze: | OpenAIRE |
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