title: Microwave conductivity and penetration depth in the heavy fermion superconductor CeCoIn5.
abstract: The electrodynamic properties of the quasi-two-dimensional heavy fermion superconductor CeCoIn5 have been investigated by microwave surface impedance measurements over a wide range of microwave frequencies and temperatures. We derive a value penetration depth lambda(0) approximately 190 nm, with a strong linear term in the temperature dependence of lambda(T) below T(c)/3, consistent with a superconducting gap with line nodes. The real part of the conductivity displays a broad peak at low temperatures consistent with a decreased scattering rate of almost 2 orders of magnitude below T(c). CeCoIn5 has remarkably similar properties to those of the high-T(c) cuprates.
authors.affiliation: School of Physics and Astronomy, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom.
authors.forename: Rodrigo J
authors.initials: RJ
authors.lastname: Ormeno
authors.forename: A
authors.initials: A
authors.lastname: Sibley
authors.forename: Colin E
authors.initials: CE
authors.lastname: Gough
authors.forename: S
authors.initials: S
authors.lastname: Sebastian
authors.forename: I R
authors.initials: IR
authors.lastname: Fisher