Superconductivity's cousin
Article Abstract:
The transformations of SO(5) symmetry can be constructed by linking the three components of the antiferromagnetic order parameter and the two real components of the d-wave superconducting order parameter into a single five-component vector. This approach allows it to be shown that the microscopic models are not consistent with an enlarged symmetry unless the order parameter of the superconductor has d-wave symmetry. This research sheds new light on the assumed connection between antiferromagnetism and superconductivity.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Time-reversal symmetry-breaking superconductivity in Sr2RuO4
Article Abstract:
The spontaneous appearance of an internal magnetic field below the transition temperature has been identified in muon spin-relaxation measurements on the superconductor SrRuO4. The presence of a field of this kind demonstrates that the superconducting state in this material can be identified by the breaking of time-reversal symmetry. There is strong evidence for Cooper pairing with spin-triplet symmetry. However, it is not possible to distinguish between the unitary and non-unitary states in Sr2RuO4.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Nickel probes superconductivity
Article Abstract:
When a magnetic nickel atom is added to a high-temperature superconductor, the nickel weakly perturbs its local environment in the superconductor. This indicates that this impurity has potential as a non-invasive probe of superconducting behaviour on the nanoscale.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
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