Amplitude Fluctuations Driven by the Density of Electron Pairs within Nanosize Granular Structures inside Strongly Disordered Superconductors: Evidence for a Shell-Like Effect
Sanjib Ghosh, Sudhansu S. Mandal
DOI 10.1103/PhysRevLett.111.207004 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Motivated by the recent observation of the shell effect in a nanoscale pure superconductor by Bose et al. [Nat. Mater. 9, 550 (2010)], we explore the possible shell-like effect in a strongly disordered superconductor as it is known to produce nanosize superconducting puddles (SPs). We find a remarkable change in the texture of the pairing amplitudes that is responsible for forming the SP, upon monotonic tuning of the average electron density, ⟨n⟩, and keeping the disorder landscape unaltered. Both the spatially averaged pairing amplitude and the quasiparticle excitation gap oscillate with ⟨n⟩. This oscillation is due to a rapid change in the low-lying quasiparticle energy spectra and thereby a change in the shapes and positions of the SPs. We establish a correlation between the formation of SPs and the shell-like effect. The experimental consequences of our theory are also discussed.
Similar papers
Amplitude Fluctuations Driven by the Density of Electron Pairs within Nanosize Granular Structuters inside Strongly Disordered Superconductors: Evidence for a Shell-Like Effect
similarity 0.93Sanjib Ghosh & Sudhansu S. Mandal · 2013 · arXiv:1307.0609
Source status unknown — claims are unverified
Shell Structure and Strengthening of Superconducting Pair Correlation in Nanoclusters
similarity 0.88Vladimir Z. Kresin & Yurii N. Ovchinnikov · 2006 · arXiv:cond-mat/0603733
Source status unknown — claims are unverified
Non-Fermi-liquid scattering against an emergent Bose liquid: Manifestations in the kink and other exotic quasiparticle behavior in the normal-state cuprate superconductors
similarity 0.86Shengtao Jiang (蒋晟韬) et al.
Source status unknown — claims are unverified
Inhomogeneity-Induced Enhancement of the Pairing Interaction in Cuprate Superconductors
similarity 0.86Maciej M. Maśka et al.
Source status unknown — claims are unverified
Density of states in gapped superconductors with pairing-potential impurities
similarity 0.85Anton Bespalov et al.
Source status unknown — claims are unverified
Effect of spin fluctuations on the electronic structure in iron-based superconductors
similarity 0.85Andreas Heimes et al.
Source status unknown — claims are unverified