Physics – Condensed Matter – Superconductivity
Scientific paper
2009-03-10
Science, vol. 323, pp. 923-926 (2009)
Physics
Condensed Matter
Superconductivity
19 pages, 1 table, 4 figures. Published version is available at http://www.riken.jp/lab-www/magmatlab/hanaguri/Research.html
Scientific paper
Coherence factors are a hallmark of superconductivity as a pair-condensation phenomenon. When electrons pair, quasi-particles develop an acute sensitivity to different types of scattering potential, described by the appearance of coherence factors in the scattering amplitudes. While the effects of coherence factors are well established in isotropic superconductors, they are much harder to detect in their anisotropic counterparts, such as high-Tc cuprates. Here we demonstrate a new approach which highlights the momentum-dependent coherence factors in Ca2-xNaxCuO2Cl2. Using Fourier-transform scanning tunnelling spectroscopy to detect quasi-particle interference effects, our experiments reveal a magnetic-field dependence in quasi-particle scattering which is sensitive to the sign of the anisotropic gap. This result can be understood in terms of d-wave coherence factors and it exposes the role of vortices as quasi-particle scattering centers. We also show that a magnetic field gives rise to an enlarged gapless region around the gap nodes.
Azuma Masaki
Coleman Paul
Hanaguri Tetsuo
Kohsaka Yoshihito
Maltseva Marianna
No associations
LandOfFree
Coherence factors in a high-Tc cuprate probed by quasi-particle scattering off vortices 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 Coherence factors in a high-Tc cuprate probed by quasi-particle scattering off vortices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coherence factors in a high-Tc cuprate probed by quasi-particle scattering off vortices will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-186627