Superfluid and normal fluid density in high-Tc superconductors
Journal
Physica B: Condensed Matter
Journal Volume
244
Pages
1-8
Date Issued
1998
Author(s)
Tanner, D. B.
Liu, H. L.
Quijada, M. A.
Zibold, A. M.
Berger, H.
Kelley, R. J.
Onellion, M.
Johnston, D. C.
Rice, J. P.
Ginsberg, D. M.
Markert, J. T.
Abstract
The electronic properties of the cuprate superconductors have been studied by measuring the reflectance over the frequency range from the far-infrared to the near-ultraviolet (roughly, 10 meV-5 eV). There is an interesting behavior in both the normal state and the superconducting state. In the normal state, there is the well-known non-Drude distribution of the doping-induced spectral weight. In the superconducting state, the spectral weight of the superconducting condensate correlates with Tc in a variety of materials. Remarkably, in optimally doped superconductors, only about 20% of the doping-induced carriers joins the superfluid; the rest of the spectral weight remains at finite frequencies. © 1998 Elsevier Science B.V. All rights reserved.
Publisher
Elsevier
Type
journal article