TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.15.6.239
TI  - Superfluid response of two-dimensional filamentary superconductors
PY  - 2023/12/14
UR  - https://scipost.org/SciPostPhys.15.6.239
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 15
IS  - 6
SP  - 239
A1  - Venditti, Giulia
AU  - Maccari, Ilaria
AU  - Jouan, Alexis
AU  - Singh, Gyanendra
AU  - Budhani, Ramesh C.
AU  - Feuillet-Palma, Cheryl
AU  - Lesueur, Jérôme
AU  - Bergeal, Nicolas
AU  - Caprara, Sergio
AU  - Grilli, Marco
AB  - Different classes of low-dimensional superconducting systems exhibit an inhomogeneous filamentary superconducting condensate whose macroscopic coherence still needs to be fully investigated and understood. Here, we present a thorough analysis of the superfluid response of a prototypical filamentary superconductor embedded in a two-dimensional metallic matrix. By mapping the system into an exactly solvable random impedance network, we show how the dissipative (reactive) response of the system non-trivially depends on both the macroscopic and microscopic characteristics of the metallic (superconducting) fraction. We compare our calculations with resonant microwave transport measurements performed on LaAlO$_3$/SrTiO$_3$ heterostructures over an extended range of temperatures and carrier densities finding that the filamentary character of superconductivity accounts for unusual peculiar features of the experimental data.
ER  -

@Article{10.21468/SciPostPhys.15.6.239,
	title={{Superfluid response of two-dimensional filamentary superconductors}},
	author={Giulia Venditti and Ilaria Maccari and Alexis Jouan and Gyanendra Singh and Ramesh C. Budhani and Cheryl Feuillet-Palma and Jérôme Lesueur and Nicolas Bergeal and Sergio Caprara and Marco Grilli},
	journal={SciPost Phys.},
	volume={15},
	pages={239},
	year={2023},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.15.6.239},
	url={https://scipost.org/10.21468/SciPostPhys.15.6.239},
}