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Superconducting boron doped nanocrystalline diamond microwave coplanar resonator

Superconducting boron doped nanocrystalline diamond microwave coplanar resonator

Authors :
Cuenca, Jerome A.
Brien, Thomas
Mandal, Soumen
Manifold, Scott
Doyle, Simon
Porch, Adrian
Klemencic, Georgina M.
Williams, Oliver A.
Publication Year :
2022

Abstract

A superconducting boron doped nanocrystalline diamond (B-NCD) coplanar waveguide resonator (CPR) is presented for kinetic inductance ($L_k$) and penetration depth ($\lambda_{\rm{L}}$) measurements at microwave frequencies of 0.4 to 1.2 GHz and at temperatures below 3 K. Using a simplified effective medium CPR approach, this work demonstrates that thin granular B-NCD films ($t\approx $ 500 nm) on Si have a large penetration depth ($\lambda_{\rm{L}}\approx 4.3$ to 4.4 $\mu$m), and therefore an associated high kinetic inductance ($L_{k,\square} \approx $ 670 to 690 pH/$\square$). These values are much larger than those typically obtained for films on single crystal diamond which is likely due to the significant granularity of the nanocrystalline films. Based on the measured Q factors of the structure, the calculated surface resistance in this frequency range is found to be as low as $\approx$ 2 to 4 $\mu\Omega$ at $T<2$ K, demonstrating the potential for granular B-NCD for high quality factor superconducting microwave resonators and highly sensitive kinetic inductance detectors.<br />Comment: First draft

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2202.13397
Document Type :
Working Paper
Full Text :
https://doi.org/10.1016/j.carbon.2022.08.084