Current Experimental Research
In 2009, experimental results have been reported claiming that magnesium diboride may fall into this new class of superconductivity. The term type-1.5 superconductor was coined for this state. Further experimental data backing this conclusion was reported in . More recent theoretical works show that the type-1.5 may be more general phenomenon because it does not require a material with two truly superconducting bands, but can also happen as a result of even very small interband proximity effect and is robust in the presence of various inter-band couplings such as interband Josephson coupling.
Read more about this topic: Type-1.5 Superconductor
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