Measuring kinetic inductance and superfluid stiffness of two-dimensional superconductors using high-quality transmission-line resonators

• URL: http://arxiv.org/abs/2407.09916v3
• Date: Thu, 17 Oct 2024 05:21:17 GMT
• Title: Measuring kinetic inductance and superfluid stiffness of two-dimensional superconductors using high-quality transmission-line resonators
• Authors: Mary Kreidel, Xuanjing Chu, Jesse Balgley, Abhinandan Antony, Nishchhal Verma, Julian Ingham, Leonardo Ranzani, Raquel Queiroz, Robert M. Westervelt, James Hone, Kin Chung Fong,
• Abstract summary: We demonstrate a new technique that employs high-quality-factor superconducting resonators to measure the kinetic inductance. We analyze the equivalent circuit model to extract the kinetic inductance, super stiffness, penetration depth, and ratio of imaginary and real parts of the complex conductivity. Our method will be useful for practitioners in the growing fields of superconducting physics, materials science, and quantum sensing.
• Score: 1.9343861862849647
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: The discovery of van der Waals superconductors in recent years has generated a lot of excitement for their potentially novel pairing mechanisms. However, their typical atomic-scale thickness and micrometer-scale lateral dimensions impose severe challenges to investigations of pairing symmetry by conventional methods. In this report we demonstrate a new technique that employs high-quality-factor superconducting resonators to measure the kinetic inductance -- up to a part per million -- and loss of a van der Waals superconductor. We analyze the equivalent circuit model to extract the kinetic inductance, superfluid stiffness, penetration depth, and ratio of imaginary and real parts of the complex conductivity. We validate the technique by measuring aluminum and finding excellent agreement in both the zero-temperature superconducting gap as well as the complex conductivity data when compared with BCS theory. We then demonstrate the utility of the technique by measuring the kinetic inductance of multi-layered niobium diselenide and discuss the limits to the accuracy of our technique when the transition temperature of the sample, NbSe$_2$ at 7.06 K, approaches our Nb probe resonator at 8.59 K. Our method will be useful for practitioners in the growing fields of superconducting physics, materials science, and quantum sensing, as a means of characterizing superconducting circuit components and studying pairing mechanisms of the novel superconducting states which arise in layered 2D materials and heterostructures.

Related papers

• Superfluid stiffness of twisted multilayer graphene superconductors [1.374933941124824]
  We report the measurement of $rho_s$ in magic-angle twisted trilayer graphene (TTG) We find a linear temperature dependence of $rho_s$ at low temperatures and nonlinear Meissner effects in the current bias dependence. Our results provide strong evidence for nodal superconductivity in TTG and put strong constraints on the mechanisms of these graphene-based superconductors.
  arXiv  Detail & Related papers  (2024-06-19T18:00:04Z)
• Superfluid Stiffness and Flat-Band Superconductivity in Magic-Angle Graphene Probed by cQED [0.32018750515900324]
  Superconductivity in magic-angle twisted bilayer graphene (MATBG) is a topic of keen interest in moir'e systems research. We use DC-transport and microwave circuit quantum electrodynamics to measure directly the superfluid stiffness of MATBG. Our findings indicate that MATBG is an unconventional superconductor with an anisotropic gap and strongly suggest a connection between quantum geometry, superfluid stiffness, and unconventional superconductivity.
  arXiv  Detail & Related papers  (2024-06-19T18:00:02Z)
• Superconductivity in a Topological Lattice Model with Strong Repulsion [1.1608869880392607]
  We introduce a minimal 2D lattice model that incorporates time-reversal symmetry, band topology, and strong repulsive interactions. We demonstrate that it is formed from the weak pairing of holes atop the QSH insulator. Motivated by this, we elucidate structural similarities and differences between our model and those of TBG in its chiral limit.
  arXiv  Detail & Related papers  (2023-08-21T18:00:01Z)
• Fragmented superconductivity in the Hubbard model as solitons in Ginzburg-Landau theory [58.720142291102135]
  Superconductivity and charge density waves are observed in close vicinity in strongly correlated materials. We investigate the nature of such an intertwined state of matter stabilized in the phase diagram of the elementary $t$-$tprime$-$U$ Hubbard model. We provide conclusive evidence that the macroscopic wave functions of the superconducting fragments are well-described by soliton solutions of a Ginzburg-Landau equation.
  arXiv  Detail & Related papers  (2023-07-21T18:00:07Z)
• Thermal self-oscillations in monolayer graphene coupled to a superconducting microwave cavity [58.720142291102135]
  We observe thermal self-oscillations in a monolayer graphene flake coupled to superconducting resonator. The experimental observations fit well with theoretical model based on thermal instability. The modelling of the oscillation sidebands provides a method to evaluate electron phonon coupling in disordered graphene sample at low energies.
  arXiv  Detail & Related papers  (2022-05-27T15:38:41Z)
• Quantum interference in asymmetric superconducting nanowire loops [0.0]
  Superconducting electronic devices are based on the modulation of the supercurrent in superconducting loops. The effects of asymmetries in such devices remain under-explored and poorly understood. A model considering the length and electronic cross-section asymmetries in the loop provides a quantitative account of the observations.
  arXiv  Detail & Related papers  (2022-03-31T17:22:19Z)
• Ultrahigh-inductance materials from spinodal decomposition [30.5681951791708]
  Disordered superconducting nitrides with kinetic inductance have long been considered a leading material candidate for high-inductance quantum-circuit applications. We propose a method to drastically increase the kinetic inductance of superconducting materials via spinodal decomposition while keeping a low microwave loss. For the first time demonstrate the utilization of spinodal decomposition to trigger the insulator-to-superconductor transition with a drastically enhanced material disorder.
  arXiv  Detail & Related papers  (2021-11-09T12:42:09Z)
• TOF-SIMS Analysis of Decoherence Sources in Nb Superconducting Resonators [48.7576911714538]
  Superconducting qubits have emerged as a potentially foundational platform technology. Material quality and interfacial structures continue to curb device performance. Two-level system defects in the thin film and adjacent regions introduce noise and dissipate electromagnetic energy.
  arXiv  Detail & Related papers  (2021-08-30T22:22:47Z)
• Measurement of the Low-temperature Loss Tangent of High-resistivity Silicon with a High Q-factor Superconducting Resonator [58.720142291102135]
  We present the direct loss tangent measurement of a high-resist intrinsicivity (100) silicon wafer in the temperature range from 70 mK to 1 K. The measurement was performed using a technique that takes advantage of a high quality factor superconducting niobium resonator.
  arXiv  Detail & Related papers  (2021-08-19T20:13:07Z)
• Quantum Sensors for Microscopic Tunneling Systems [58.720142291102135]
  tunneling Two-Level-Systems (TLS) are important for micro-fabricated quantum devices such as superconducting qubits. We present a method to characterize individual TLS in virtually arbitrary materials deposited as thin-films. Our approach opens avenues for quantum material spectroscopy to investigate the structure of tunneling defects.
  arXiv  Detail & Related papers  (2020-11-29T09:57:50Z)
• Waveguide Bandgap Engineering with an Array of Superconducting Qubits [101.18253437732933]
  We experimentally study a metamaterial made of eight superconducting transmon qubits with local frequency control. We observe the formation of super- and subradiant states, as well as the emergence of a polaritonic bandgap. The circuit of this work extends experiments with one and two qubits towards a full-blown quantum metamaterial.
  arXiv  Detail & Related papers  (2020-06-05T09:27:53Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.