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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Cryogenic GaAs SAW resonators achieve Q factors up to 28,000 in the GHz range via systematic geometry and orientation tuning, with mesa steps added to study scattering and dissipation for quantum acoustics applications.
Nanogap patterning on NbTi thin-film resonators decreases TC by 1.5 K and raises dfres/dT to 62 MHz/K at 4.2 K, enhancing cryogenic thermometry sensitivity by 10x.
citing papers explorer
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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.
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High-Q cryogenic surface acoustic wave resonators in the GHz range
Cryogenic GaAs SAW resonators achieve Q factors up to 28,000 in the GHz range via systematic geometry and orientation tuning, with mesa steps added to study scattering and dissipation for quantum acoustics applications.
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Surface nanostructuring of NbTi superconducting thin-film resonators for enhanced cryogenic thermometry
Nanogap patterning on NbTi thin-film resonators decreases TC by 1.5 K and raises dfres/dT to 62 MHz/K at 4.2 K, enhancing cryogenic thermometry sensitivity by 10x.