Ni impurity induced enhancement of the pseudogap in cuprate high T_c superconductors

Details Ni impurity induced enhancement of the pseudogap in cuprate high T_c superconductors Ni impurity induced enhancement of the pseudogap in cuprate high T_c superconductors

2004-12-09

arxiv.org/abs/cond-mat/0412250v1

Phys. Rev. Lett. 94, 227003 (2005)

Physics

Condensed Matter

Superconductivity

11 pages and 2 figures

Scientific paper

10.1103/PhysRevLett.94.227003

The influence of magnetic Ni and non-magnetic Zn impurities on the normal state pseudogap (PG) in the c-axis optical conductivity of NdBa$_{2}$\{Cu$% _{1-y}$(Ni,Zn)$_{y}\}_{3}$O$_{7-\delta}$ crystals was studied by spectral ellipsometry. We find that these impurities which strongly suppress superconductivity have a profoundly different impact on the PG. Zn gives rise to a gradual and inhomogeneous PG suppression while Ni strongly enhances the PG. Our results challenge theories that relate the PG either to precursor superconductivity or to other phases with exotic order parameters, such as flux phase or d-density wave states, that should be suppressed by potential scattering. The apparent difference between magnetic and non-magnetic impurities instead points towards an important role of magnetic correlations in the PG state.

Affiliated with

Also associated with

No associations

Rating

Ni impurity induced enhancement of the pseudogap in cuprate high T_c 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 Ni impurity induced enhancement of the pseudogap in cuprate high T_c superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ni impurity induced enhancement of the pseudogap in cuprate high T_c superconductors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-152008