Impurity States and the Absence of Quasiparticle Localization in Disordered D-Wave Superconductors

Details Impurity States and the Absence of Quasiparticle Localization in Disordered D-Wave Superconductors Impurity States and the Absence of Quasiparticle Localization in Disordered D-Wave Superconductors

1996-02-07

arxiv.org/abs/cond-mat/9602034v1

Physics

Condensed Matter

4 pages, uuencoded postscript file

Scientific paper

10.1103/PhysRevLett.76.2386

The absence of localization of impurity-induced low-energy quasiparticle states in a two-dimensional $d$-wave superconductor is argued for any amount of disorder in the limit of unitary scatterers. This surprising result follows from the fact that a unitary impurity produces a marginally-bound state at zero energy which decays as a power-law along the nodes of the $d$-wave energy gap. Consequently, for finite density of impurities, the impurity-induced states are coupled by long-range overlaps yielding extended quasiparticle states below a characteristic energy scale $\omega_c$. Simple scaling arguments suggest that $\omega_c \propto e^{-c/n_{\rm imp}}$, where $n_{\rm imp}$ is the impurity density and $c$ is a positive constant.

Affiliated with

Also associated with

No associations

Rating

Impurity States and the Absence of Quasiparticle Localization in Disordered D-Wave Superconductors 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 Impurity States and the Absence of Quasiparticle Localization in Disordered D-Wave Superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impurity States and the Absence of Quasiparticle Localization in Disordered D-Wave Superconductors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-377574