NDLI: Microwave Losses in YBCO Coplanar Waveguide Resonators at Low Power and Millikelvin Range

Content Provider	IEEE Xplore Digital Library
Author	Arzeo, M. Lombardi, F. Bauch, T.
Copyright Year	2002
Abstract	We have investigated the temperature dependence of microwave losses in the low-power limit and millikelvin temperature range of a thin-film YBa₂Cu₃O_7-x (YBCO) λ/2 coplanar waveguide resonator patterned on a (La_0.3Sr_0.7) (Al_0.65Ta_0.35)O₃ (LSAT) substrate covered by a CeO₂ seed layer. The unloaded quality factor is mainly governed by the surface resistance of the YBCO film and the dielectric losses caused by resonant absorption due to a bath of two-level fluctuators in the dielectrics. The value of the unloaded quality factor at 20 mK and low power, i.e., Q₀ ≃2000, allows for the realization of YBCO microwave quantum circuits implementing biepitaxial grain-boundary Josephson junctions.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1
Ending Page	4
Page Count	4
File Size	397660
File Format	PDF
ISSN	10518223
Volume Number	25
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Yttrium barium copper oxide Dielectric losses Josephson junctions Superconducting microwave devices Microwave theory and techniques yttrium barium copper oxide (YBCO) high critical temperature supreconductors superconducting microwave devices superconducting thin films surface resistance
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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