Print Email Facebook Twitter Quantum paraelectricity probed by superconducting resonators Title Quantum paraelectricity probed by superconducting resonators Author Davidovikj, D. (TU Delft QN/Steeneken Lab) Manca, N. (TU Delft QN/Caviglia Lab) van der Zant, H.S.J. (TU Delft QN/van der Zant Lab) Caviglia, A. (TU Delft QN/Caviglia Lab) Steele, G.A. (TU Delft QN/Steele Lab) Date 2017-06-28 Abstract Superconducting coplanar waveguide (CPW) resonators are powerful and versatile tools used in areas ranging from radiation detection to circuit quantum electrodynamics. Their potential for low intrinsic losses makes them attractive as sensitive probes of electronic properties of bulk materials and thin films. Here we use superconducting MoRe CPW resonators to investigate the high-frequency (up to 0.3 GHz) and low-temperature (down to 3.5 K) permittivity of SrTiO3, a nonlinear dielectric on the verge of a ferroelectric transition (quantum paraelectricity). We perform a quantitative analysis of its dielectric properties as a function of external dc bias (up to ±15V), rf power, and mode number and discuss our results within the framework of the most recent theoretical models. We also discuss the origin of a fatigue effect that reduces the tunability of the dielectric constant of SrTiO3, which we relate to the presence of oxygen vacancies. To reference this document use: http://resolver.tudelft.nl/uuid:529f3e77-8455-434c-8f87-74907280ae9b DOI https://doi.org/10.1103/PhysRevB.95.214513 ISSN 1098-0121 Source Physical Review B (Condensed Matter and Materials Physics), 95 (21) Part of collection Institutional Repository Document type journal article Rights © 2017 D. Davidovikj, N. Manca, H.S.J. van der Zant, A. Caviglia, G.A. Steele Files PDF PhysRevB.95.214513.pdf 597.84 KB Close viewer /islandora/object/uuid:529f3e77-8455-434c-8f87-74907280ae9b/datastream/OBJ/view