TY - JOUR

T1 - The microwave surface impedance of ultra-pure superconducting metals

AU - Hein, Matthias

AU - Ormeno, Rodrigo

AU - Gough, Colin

PY - 2001/1/29

Y1 - 2001/1/29

N2 - Quasiparticle relaxation and non-local effects on the surface impedance Z(s) of pure metals are analysed for arbitrary relaxation times tau and mean free paths I. The analysis predicts a non-monotonic variation of the differential loss tangent (partial derivativeR(s)/partial derivative tau)/(partial derivativeX(s)/partial derivative tau) in the normal state, which distinguishes it from the classical limits. In the superconducting state, Z(s) can be described by a two-fluid model incorporating a Drude-type conductivity and an effective relaxation time tau (e). The t-values derived from theory and data measured on Sr2RuO3-crystals using a hollow dielectric resonator technique at 10 GHz are consistent, and in accordance with DC resistivity data.

AB - Quasiparticle relaxation and non-local effects on the surface impedance Z(s) of pure metals are analysed for arbitrary relaxation times tau and mean free paths I. The analysis predicts a non-monotonic variation of the differential loss tangent (partial derivativeR(s)/partial derivative tau)/(partial derivativeX(s)/partial derivative tau) in the normal state, which distinguishes it from the classical limits. In the superconducting state, Z(s) can be described by a two-fluid model incorporating a Drude-type conductivity and an effective relaxation time tau (e). The t-values derived from theory and data measured on Sr2RuO3-crystals using a hollow dielectric resonator technique at 10 GHz are consistent, and in accordance with DC resistivity data.

UR - http://www.scopus.com/inward/record.url?scp=0035137232&partnerID=8YFLogxK

U2 - 10.1088/0953-8984/13/4/101

DO - 10.1088/0953-8984/13/4/101

M3 - Letter

SN - 0953-8984

VL - 13

SP - L65-L71

JO - Journal of Physics: Condensed Matter

JF - Journal of Physics: Condensed Matter

IS - 4

ER -