Impurity induced double transitions for accidentally degenerate unconventional pairing states
Abstract
Non-magnetic impurities can lift the accidental degeneracy of unconventional pairing states, such as the (d + i g)-wave state recently proposed for Sr2RuO4. This type of effect would lead to a superconducting double transition upon impurity doping. In a model calculation it is shown how this behavior depends on material parameters and how it could be detected.
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