Alkyl-phosphonate SAMs on Nb thin films suppress oxide regrowth and maintain temporal stability in superconducting resonators over six days at 10 mK, with SAM TLS loss quantified at approximately 5 times 10 to the minus 7 using a two-component model.
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High temporal stability of niobium superconducting resonators by surface passivation with organophosphonate self-assembled monolayers
Alkyl-phosphonate SAMs on Nb thin films suppress oxide regrowth and maintain temporal stability in superconducting resonators over six days at 10 mK, with SAM TLS loss quantified at approximately 5 times 10 to the minus 7 using a two-component model.