Physics – Condensed Matter – Superconductivity
Scientific paper
2004-08-03
Frontiers in Superconductivity Research (Nova Science Publishers, 2004)
Physics
Condensed Matter
Superconductivity
44 pages, 15 figures
Scientific paper
The optical conductivity measurements give a powerful tool to investigate the nature of the superconducting gap for conventional and unconventional superconductors. In this article, first, general analyses of the optical conductivity are given stemmed from the Mattis-Bardeen formula for conventional BCS superconductors to unconventional anisotropic superconductors. Second, we discuss the reflectance-transmittance (R-T) method which has been proposed to measure far-infrared spectroscopy. The R-T method provides us precise measurements of the frequency-dependent conductivity. Third, the optical conductivity spectra of the electron-doped cuprate superconductor Nd_{2-x}Ce_xCuO_4 are investigated based on the anisotropic pairing model. It is shown that the behavior of optical conductivity is consistent with an anisotropic gap and is well explained by the formula for d-wave pairing in the far-infrared region. The optical properties of the multiband superconductor MgB_2, i n which the existence of superconductivity with relatively high-T_c (39K) was recently announced, is also examined to determine the symmetry of superconducting gaps.
Shibata Hajime
Yanagisawa Takashi
No associations
LandOfFree
Optical properties of unconventional 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 Optical properties of unconventional superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical properties of unconventional superconductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-307099