Physics – Condensed Matter – Superconductivity
Scientific paper
2009-01-22
Physics
Condensed Matter
Superconductivity
Scientific paper
We performed Raman experiments on superconducting ${\rm Bi_2 Sr_2 (Ca_{1-x} Y_x) Cu_2 O_{8+\delta}}$ (Bi-2212) and ${\rm YBa_{2} Cu_{3}O_{6+x}}$ (Y-123) single crystals. These results in combination with earlier ones enable us to analyze systematically the spectral features in the doping range $0.07 \le p \le 0.23$. In $B_{2g}$ ($xy$) symmetry we find universal spectra and the maximal gap energy $\Delta_0$ to follow the superconducting transition temperature $T_c$. The $B_{1g}$ ($x^2-y^2$) spectra in Bi-2212 show an anomalous increase of the intensity towards overdoping, indicating that the corresponding energy scale is neither related to the pairing energy nor to the pseudogap, but possibly stems from a symmetry breaking transition at the onset point of superconductivity at $p_{\rm sc2} \simeq 0.27$.
Ando Yoichi
Damascelli Andrea
Eisaki Hiroshi
Erb Andreas
Greven Martin
No associations
LandOfFree
Pair breaking versus symmetry breaking: Origin of the Raman modes in superconducting 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 Pair breaking versus symmetry breaking: Origin of the Raman modes in superconducting cuprates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pair breaking versus symmetry breaking: Origin of the Raman modes in superconducting cuprates will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-189532