Ground State and Spectral Properties of a Quantum Impurity in d-Wave Superconductors

Details Ground State and Spectral Properties of a Quantum Impurity in d-Wave Superconductors Ground State and Spectral Properties of a Quantum Impurity in d-Wave Superconductors

2002-05-24

arxiv.org/abs/cond-mat/0205498v2

Phys. Rev. B, 67, 180507(R), (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4figures, revised version

Scientific paper

10.1103/PhysRevB.67.180507

The variational approach of Gunnarsson and Sch\"onhammer to the Anderson impurity model is generalized to study d-wave superconductors in the presence of dilute spin-1/2 impurities. We show that the local moment is screened when the hybridization exceeds a nonzero critical value at which the ground state changes from a spin doublet to a spin singlet. The electron spectral functions are calculated in both phases. We find that while a Kondo resonance develops above the Fermi level in the singlet phase, the spectral function exhibits a low-energy spectral peak below the Fermi level in the spin doublet phase. The origin of such a ``virtual Kondo resonance'' is the existence of low-lying collective excitations in the spin-singlet sector. We discuss our results in connection to recent spectroscopic experiments on Zn doped high-T$_c$ superconductors.

Affiliated with

Also associated with

No associations

Rating

Ground State and Spectral Properties of a Quantum Impurity in 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 Ground State and Spectral Properties of a Quantum Impurity in d-Wave Superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ground State and Spectral Properties of a Quantum Impurity in d-Wave Superconductors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-420528