Superfluid density in cuprates: hints on gauge compositeness of the holes

Abstract

We show that several features (the three-dimensional XY universality for moderate underdoping, the almost-BCS behaviour for moderate overdoping and the critical exponent) of the superfluid density in hole-doped cuprates hint at a composite structure of the holes. This idea can be implemented in a spin-charge gauge approach to the $t-t^{\prime }-J$ model and provides indeed good agreement with available experimental data.

5 pages, 1 figure, to be published in the proceedings of the International Conference in Superconductivty and Magnetism ICSM2016

References in corpus (2)

• Spin-charge gauge approach to metal-insulator crossover and transport properties in High-T${}_c$ cuprates
• Interplay of superconductivity and magnetism in a t-t'-J approach to high Tc cuprates