Disappearance of Meissner Effect and Specific Heat Jump in a Multiband Superconductor, Ba0.2K0.8Fe2As2

Tanaka, Y.; Shirage, P. M.; Iyo, A.
February 2010
Journal of Superconductivity & Novel Magnetism;Feb2010, Vol. 23 Issue 2, p253
Academic Journal
We observed the disappearance of the Meissner effect and the specific heat jump in Ba0.2K0.8Fe2As2. A crossover of the type of superconducting order parameter can be a source of these phenomena. A quantum phase disorder provides a possible explanation.


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