title: Surface-resistance measurements using superconducting stripline resonators.
abstract: We present a method to measure the absolute surface resistance of conductive samples at a set of GHz frequencies with superconducting lead stripline resonators at temperatures 1-6 K. The stripline structure can easily be applied for bulk samples and allows direct calculation of the surface resistance without the requirement of additional calibration measurements or sample reference points. We further describe a correction method to reduce experimental background on high-Q resonance modes by exploiting TEM-properties of the external cabling. We then show applications of this method to the reference materials gold, tantalum, and tin, which include the anomalous skin effect and conventional superconductivity. Furthermore, we extract the complex optical conductivity for an all-lead stripline resonator to find a coherence peak and the superconducting gap of lead.
authors: 1. Physikalisches Institut, Universität Stuttgart, D-70550 Stuttgart, Germany.
authors: Daniel
authors: D
authors: Hafner
authors: 1. Physikalisches Institut, Universität Stuttgart, D-70550 Stuttgart, Germany.
authors: Martin
authors: M
authors: Dressel
authors: 1. Physikalisches Institut, Universität Stuttgart, D-70550 Stuttgart, Germany.
authors: Marc
authors: M
authors: Scheffler