Inhomogeneous Superconductivity in Organic and Related Superconductors

Evidence of inhomogeneous superconductivity, in this case superconductivity with a spatially modulated superconducting order parameter, has now been found in many materials and by many measurement methods. Although the evidence is strong, it is circumstantial in the organic superconductors, scant in...

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Bibliographic Details
Published in:Crystals (Basel) 2018-07, Vol.8 (7), p.285
Main Author: Agosta, Charles
Format: Article
Language:English
Subjects:
Energy gap
Energy measurement
Fermions
FFLO
Group 5A compounds
inhomogeneous superconductors
Magnetic fields
Magnetism
Measurement methods
Measurement techniques
Order parameters
Organic superconductors
Phase transitions
quasi 2D materials
Superconductivity
Vortices
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Summary:Evidence of inhomogeneous superconductivity, in this case superconductivity with a spatially modulated superconducting order parameter, has now been found in many materials and by many measurement methods. Although the evidence is strong, it is circumstantial in the organic superconductors, scant in the pnictides, and complex in the heavy Fermions. However, it is clear some form of exotic superconductivity exists at high fields and low temperatures in many electronically anisotropic superconductors. The evidence is reviewed in this article, and examples of similar measurements are compared across different families of superconductors. An effort is made to find a consistent way to measure the superconducting energy gap across all materials, and use this value to predict the Clogston–Chandrasakhar paramagnetic limit Hp. Methods for predicting the existence of inhomogeneous superconductivity are shown to work for the organic superconductors, and then used to suggest new materials to study.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst8070285