Far infrared thermal spectroscopy of low-Tc and high-Tc superconductor films

Details Far infrared thermal spectroscopy of low-Tc and high-Tc superconductor films Far infrared thermal spectroscopy of low-Tc and high-Tc superconductor films

2001-11-19

arxiv.org/abs/cond-mat/0111336v1

Physics

Condensed Matter

Superconductivity

6 pages, 7 figures

Scientific paper

Temperature dependence of far-infrared transmission of NbN thin films deposited on MgO and Si substrates was measured at several frequencies from 0.4 up to 4.3 THz. Exponential increase of relative penetration depth at low temperatures and a peak in transmission near Tc was observed for frequencies below the optical gap. On the contrary, transmission measured at frequencies above the gap exhibits only flat, almost linear temperature dependence. This behavior is consistent with the BCS theory of superconductivity. Similar measurements were performed also on YBaCuO thin films deposited on MgO and sapphire substrates. Low-temperature variation of transmission is linear or constant and the peak below Tc predicted by the BCS theory is not observed. Flat temperature dependence at higher frequencies indicates that the photon energy was sufficient for excitation over the optical gap. The s-wave BCS theory is adequate for NbN films but not for the YBCO materials.

Affiliated with

Also associated with

No associations

Rating

Far infrared thermal spectroscopy of low-Tc and high-Tc superconductor films 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 Far infrared thermal spectroscopy of low-Tc and high-Tc superconductor films, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Far infrared thermal spectroscopy of low-Tc and high-Tc superconductor films will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-394514