Effects of residual oxygen on superconducting niobium films

Miguel Manzo-Perez; Moeid Jamalzadeh; Zhujun Huang; Xiao Tong; Kim Kisslinger; Dmytro Nykypanchuk; Davood Shahrjerdi

doi:10.1063/5.0225589

Effects of residual oxygen on superconducting niobium films

Miguel Manzo-Perez, Moeid Jamalzadeh, Zhujun Huang, Xiao Tong, Kim Kisslinger, Dmytro Nykypanchuk, Davood Shahrjerdi

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The integration of niobium (Nb) into emerging superconducting circuits can enhance their performance and function. However, growth of high purity Nb can be challenging due to its high reactivity with oxygen. Here, we examine the role of residual oxygen inside the growth chamber in transforming the structural, chemical, and superconducting properties of Nb films. We demonstrate that an increase in unintentional oxygen impurities lowers the superconducting critical temperature of Nb. This evolution coincides with the reduction of Nb crystal domains, which are separated by highly disordered oxygen-rich regions. Moreover, chemical analysis reveals the formation of niobium monoxide within the film during growth. These findings provide a comprehensive picture of how residual oxygen in the growth chamber can affect the properties of the Nb films. This study contributes to the materials science and engineering knowledge of superconducting Nb growth.

Original language	English (US)
Article number	112602
Journal	Applied Physics Letters
Volume	125
Issue number	11
DOIs	https://doi.org/10.1063/5.0225589
State	Published - Sep 9 2024

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/5.0225589

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abstract = "The integration of niobium (Nb) into emerging superconducting circuits can enhance their performance and function. However, growth of high purity Nb can be challenging due to its high reactivity with oxygen. Here, we examine the role of residual oxygen inside the growth chamber in transforming the structural, chemical, and superconducting properties of Nb films. We demonstrate that an increase in unintentional oxygen impurities lowers the superconducting critical temperature of Nb. This evolution coincides with the reduction of Nb crystal domains, which are separated by highly disordered oxygen-rich regions. Moreover, chemical analysis reveals the formation of niobium monoxide within the film during growth. These findings provide a comprehensive picture of how residual oxygen in the growth chamber can affect the properties of the Nb films. This study contributes to the materials science and engineering knowledge of superconducting Nb growth.",

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AU - Jamalzadeh, Moeid

AU - Huang, Zhujun

AU - Tong, Xiao

AU - Kisslinger, Kim

AU - Nykypanchuk, Dmytro

AU - Shahrjerdi, Davood

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Effects of residual oxygen on superconducting niobium films

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