Effect of defects on the critical points in YBa2Cu3O7−δ
| Autor: | David J. Hofman, Lisa Paulius, William Moulton, Goran Karapetrov, W. K. Kwok, R. J. Olsson, G. W. Crabtree |
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| Rok vydání: | 2000 |
| Předmět: |
Materials science
Condensed matter physics Energy Engineering and Power Technology Yba2cu3o7 δ Quantum entanglement Tourbillon Condensed Matter Physics Critical point (mathematics) Electronic Optical and Magnetic Materials Vortex Condensed Matter::Soft Condensed Matter Condensed Matter::Superconductivity Electrical and Electronic Engineering Glass transition Critical field Phase diagram |
| Zdroj: | Physica C: Superconductivity. :953-956 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/s0921-4534(00)00750-4 |
| Popis: | The upper and lower critical points are investigated in untwinned YBa 2 Cu 3 O 7−δ single crystals with dilute columnar defects. Dilute columnar defects raise the upper critical point, indicating that the transition near the upper critical point is a vortex entanglement transition. The lower critical point is very sensitive to columnar defect disorder and its position can be described by a Lindemann-like criterion similar to that for melting. Dilute columnar defects induce non-linear behavior in the I-V curves of the vortex liquid state above the lower critical point, which we interpret as a vestige of the critical region associated with the Bose glass transition below the lower critical point. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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