Physics – Condensed Matter – Superconductivity
Scientific paper
2011-03-02
Physics
Condensed Matter
Superconductivity
5 pages, 3 figures
Scientific paper
Fresnel single aperture diffraction (FSAD) is proposed as a phase-sensitive probe for pairing symmetry and Fermi surface of a superconductor. We consider electrons injected, through a small aperture, into a thin superconducting (SC) layer. It is shown that in case of SC gap symmetry $\Delta(-k_x,\mathbf{k}_\parallel)=\Delta(k_x,\mathbf{k}_\parallel)$ with $k_x$ and $\mathbf{k}_\parallel$ respectively the normal and parallel component of electron Fermi wavevector, quasiparticle FSAD pattern developed at the image plane is zeroth-order minimum if $k_x x=n\pi$ ($n$ is an integer and $x$ is SC layer thickness). In contrast, if $\Delta(-k_x,\mathbf{k}_\parallel)=-\Delta(k_x, \mathbf{k}_\parallel)$, the corresponding FSAD pattern is zeroth-order maximum. Observable consequences are discussed for iron-based superconductors of complex multi-band pairings.
Liu Char-Shine
Wu Way-Chen
No associations
LandOfFree
Fresnel aperture diffraction: a phase-sensitive probe for superconducting pairing symmetry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Fresnel aperture diffraction: a phase-sensitive probe for superconducting pairing symmetry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fresnel aperture diffraction: a phase-sensitive probe for superconducting pairing symmetry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-474632