Quantum paraelectricity probed by superconducting resonators

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 non-linear 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.

References in corpus (11)

• Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box
• High cooperativity in coupled microwave resonator ferrimagnetic insulator hybrids
• High cooperativity coupling of electron-spin ensembles to superconducting cavities
• Experimental evidence for a surface distribution of two-level systems in superconducting lithographed microwave resonators
• Surface loss simulations of superconducting coplanar waveguide resonators
• Tunability of the dielectric response of epitaxially strained SrTiO3 from first principles
• Local Electrostatic Imaging of Striped Domain Order in LaAlO3/SrTiO3
• Weak-localization and spin-orbit interaction in side-gate field effect devices at the LaAlO${}_3$/SrTiO${}_3$ interface
• Side gate tunable Josephson junctions at the LaAlO${}_3$/SrTiO${}_3$ interface
• Molybdenum-Rhenium alloy based high-$Q$ superconducting microwave resonators
• Magneto-transport study of top- and back-gated LaAlO${}_3$/SrTiO${}_3$ heterostructures

Cited by in corpus (10)

• Probing quantum devices with radio-frequency reflectometry
• Balanced electron-hole transport in spin-orbit semimetal SrIrO3 heterostructures
• Bimodal Phase Diagram of the Superfluid Density in LaAlO3/SrTiO3 Revealed by an Interfacial Waveguide Resonator
• Cryogenic hyperabrupt strontium titanate varactors for sensitive reflectometry of quantum dots
• Characterizing dielectric properties of ultra-thin films using superconducting coplanar microwave resonators
• 50 Ohm Transmission Lines with Extreme Wavelength Compression Based on Superconducting Nanowires on High-Permittivity Substrates
• All-electrical operation of a spin qubit coupled to a high-Q resonator
• Characterization of harmonic modes and parasitic resonances in multi-mode superconducting coplanar resonators
• Bidirectional microwave-optical conversion with an integrated soft-ferroelectric barium titanate transducer
• Surface acoustic wave generation and detection in quantum paraelectric regime of SrTiO${}_3$-based heterostructure