Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-12-20
Phys. Rev. B 77, 245121 (2008)
Physics
Condensed Matter
Strongly Correlated Electrons
6 pages, 5 figures, typos corrected, final version in Phys. Rev. B
Scientific paper
We analyze the density of state (DOS) and a non-magnetic impurity effect in electron-doped cuprates starting from two different scenarios: the $d_{x^{2}-y^{2}}$-wave superconductivity coexisting with antiferromagnetic spin density wave (SDW) order versus $d_{x^{2}-y^{2}}$-wave superconductivity with a higher harmonic. We find that in both cases the local density of state (LDOS) exhibits two impurity-induced resonance states at low energies. We also find that for the intermediate value of the SDW gap, the DOS looks similar to that obtained from the scenario of the $d_{x^{2}-y^{2}}$-wave gap with a higher harmonic, suggesting the presence of a non-monotonic $d_{x^{2}-y^{2}}$-wave gap. However, if the SDW gap is sufficiently large the DOS looks more conventional s-wave like. This obvious difference from the DOS resulted from the $d_{x^{2}-y^{2}}$-wave gap with a higher harmonic model, could differentiate the two above scenarios and is needed to be proved in the further doping dependence of tunneling spectrum measurement.
Liang Yanbin
Liu Bin
No associations
LandOfFree
Density of state and non-magnetic impurity effects in electron-doped cuprates 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 Density of state and non-magnetic impurity effects in electron-doped cuprates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Density of state and non-magnetic impurity effects in electron-doped cuprates will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-2459