Can Doping Graphite Trigger Room Temperature Superconductivity? Evidence for Granular High-Temperature Superconductivity in Water-Treated Graphite Powder
| Autor: | José Barzola-Quiquia, Pablo Esquinazi, Thomas Scheike, Annette Setzer, Winfried Böhlmann, A. Ballestar |
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| Rok vydání: | 2012 |
| Předmět: |
High-temperature superconductivity
Materials science FOS: Physical sciences law.invention Superconductivity (cond-mat.supr-con) Condensed Matter - Strongly Correlated Electrons Magnetics Condensed Matter::Materials Science Electrical resistivity and conductivity law Condensed Matter::Superconductivity General Materials Science Graphite Superconductivity Condensed Matter - Materials Science Room-temperature superconductor Strongly Correlated Electrons (cond-mat.str-el) Magnetic moment Condensed matter physics Condensed Matter - Superconductivity Mechanical Engineering Doping Electric Conductivity Temperature Materials Science (cond-mat.mtrl-sci) Water Oxides Magnetic field Mechanics of Materials |
| Zdroj: | Advanced Materials. 24:5826-5831 |
| ISSN: | 0935-9648 |
| DOI: | 10.1002/adma.201202219 |
| Popis: | Trying to dope graphite flakes we found that the magnetization of pure, several tens of micrometers grain size graphite powder and after a simple treatment with pure water shows clear and reproducible granular superconducting behavior with a critical temperature above 300K. The observed magnetic characteristics as a function of temperature, magnetic field and time, provide evidence for weakly coupled grains through Josephson interaction, revealing the existence of superconducting vortices. Comment: 19 pages, 5 figures; http://onlinelibrary.wiley.com/doi/10.1002/adma.201202219/abstract (2012) |
| Databáze: | OpenAIRE |
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