Topological order in the phase diagram for high-temperature superconductors with point defects |
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Authors: | Jan Kierfeld |
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Institution: | a Institut für Theoretische Physik der Universität zu Köln, D-50937 Köln, Germany b Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA |
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Abstract: | Applying a Lindemann like criterion obtained previously by Kierfeld et al. J. Kierfeld, T. Nattermann, T. Hwa, Phys. Rev. B 55 (1997) 626], we estimate the magnetic field and temperature for a high-Tc superconductor, at which a topologically ordered vortex glass phase becomes unstable with respect to a disorder-induced formation of dislocations. The employed criterion is shown to be equivalent to a conventional phenomenological Lindemann criterion including the values for the numerical factors, i.e., for the Lindemann number. The positional correlation length of the topologically ordered vortex glass is calculated. |
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Keywords: | High temperature superconductors Phase diagrams Point defects Dislocations (crystals) Magnetic fields Topology Lindemann number |
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