Work

Electrodynamics of the organic superconductorsinebreak κ-(BEDT-TTF )2 Cu(NCS )2 and κ-(BEDT-TTF )2 Cu[N(CN )2 ]Br

Year: 1994

Type: article

Abstract: We have performed measurements of the surface impedance in the normal and superconducting states of the title compounds in the millimeter wave-frequency range (1--3 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$), and have evaluated the complex conductivity for different crystallographic orientations. Above the transition temperature, the materials behave like metals with a scattering rate of approximately 20 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$. In the superconducting state the electrodynamics is in good agreement with calculations based on a BCS ground state: while the penetration depth and the coherence length are anisotropic, the superconducting energy gap shows no indications of line nodes.

Source: Physical review. B, Condensed matter

DOI: 10.1103/physrevb.50.13603

Authors: M. Dressel, O. Klein, G. Grüner, K. D. Carlson, H. H. Wang, J. M. Williams

Institutions: University of California, Los Angeles, Argonne National Laboratory

Language: English

Topic: Organic and Molecular Conductors Research

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green