Flexible NbTiN thin films for superconducting electronics

Nieto, S. J. Rezinovsky; Hofer, J.; Sirena, M.; Haberkorn, N.

doi:10.1016/j.physc.2023.1354241

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…However, the main difference may be related to a higher roughness for the film on Kapton, as evidenced by larger differences between the minima and maxima of the profile and an increase in RMS from 0.4 nm for the sample on silicon to 1.1 nm for the sample on Kapton. The latter could be attributed to the original surface roughness present in the flexible substrate [23]. No features related to mechanical damage are observed in the film on Kapton.…”

Section: Resultsmentioning

confidence: 90%

“…Additionally, to analyze the feasibility of deposition on flexible substrates, a thin film with a thickness of approximately 150 nm was grown on flexible Kapton using similar parameters. Details regarding the surface features of Kapton, with a Root Mean Square roughness (RMS) of approximately 1.1 nm, were previously described in reference [23]. The deposition rate under the described parameters results in ≈ 10 nm min −1 .…”

Section: Methodsmentioning

confidence: 99%

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Penetration depth and critical fields in superconducting NbTi thin films grown by co-sputtering at room temperature

Lee,

Yun,

Lee

et al. 2024

Phys. Scr.

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We present a study on the superconducting properties of 300 nm thick NbTi thin films grown by co-sputtering on silicon substrates at room temperature. The samples exhibit a Nb (50 at.%) and Ti (50 at.%) chemical composition, revealing a polycrystalline structure textured along the (110) axis of the body-centered cubic structure. The measured superconducting critical temperature (Tc ) was 9.65 K, and the upper critical field extrapolated to zero temperature reached approximately 15 T, resulting in a coherence length at zero temperature of approximately 4.7 nm. The penetration depth was determined through local magnetic force microscopy measurements conducted at temperatures from 4.25 to 7 K. The obtained values ranges from 250 (15) nm at 4.25 K to 370 (20) nm at 7 K. Extrapolating these measurements to zero temperature, we obtained an estimated value of 230 (20) nm. To extend the performance and potential applications of NbTi, we additionally grew a 150 nm thick sample on flexible polyimide. In this case, we observed that the films preserved their superconducting properties, displaying a decrease in Tc to 9.2 K and a similar upper critical field compared to samples grown on silicon. The feasibility of growing NbTi alloys at room temperature, with superconducting parameters comparable to or superior to metallic Nb for the upper critical field, renders this system promising for cryogenic applications, particularly in the development of high-performance electronic devices on both rigid and flexible substrates.

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Section: Resultsmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Penetration depth and critical fields in superconducting NbTi thin films grown by co-sputtering at room temperature

Lee,

Yun,

Lee

et al. 2024

Phys. Scr.

Self Cite

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“…Especially, the use of flexible substrates is a trend for SC electronic applications in the future. Currently, although investigations have been carried out in SC films based on flexible substrates [38][39][40], there is still a lack of systematic research on the influence of flexible substrates on superconductivity. Thus it is worth to investigate this issue and uncover the possible differences between the inorganic rigid substrates (IRSs) and organic flexible substrates (OFSs) concerning the regulation of superconductivity.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of superconductivity by organic flexible substrates in NbSe₂ thin flakes

Jiang,

Chen,

Liu

et al. 2024

Supercond. Sci. Technol.

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The regulation of superconductivity is of great significance in basic physics and device applications. Typically superconductivity can be tuned by chemical doping, gate voltage, and pressure. The interaction between superconductivity and substrates in low-dimensional systems is concerned in recent years, but a systematic and in-depth investigation is still lacking. Here we report a systematic study concerning the influence of substrates on the performance of superconductivity in NbSe2 thin flakes. It is found that the superconducting critical temperature Tc can be enhanced when the organic flexible substrates are adopted, as compared with that using the inorganic rigid substrates. Such an enhancement is more distinct under the applied magnetic fields. The analysis combined with Raman scattering experiments shows that the improvement of superconductivity is closely related to the softening of E1 2g phonon mode, pointing out the most possible mechanism for the effect of substrates on superconductivity. Meanwhile, the involvement of organic substrate also enhances the wave number of the charge-density-wave related soft mode.

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Penetration depth in dirty superconducting NbTiN thin films grown at room temperature

Lee,

Yun,

Lee

et al. 2024

Appl. Phys. A

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Flexible NbTiN thin films for superconducting electronics

Cited by 5 publications

References 26 publications

Penetration depth and critical fields in superconducting NbTi thin films grown by co-sputtering at room temperature

Penetration depth and critical fields in superconducting NbTi thin films grown by co-sputtering at room temperature

Enhancement of superconductivity by organic flexible substrates in NbSe₂ thin flakes

Penetration depth in dirty superconducting NbTiN thin films grown at room temperature

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Flexible NbTiN thin films for superconducting electronics

Cited by 5 publications

References 26 publications

Penetration depth and critical fields in superconducting NbTi thin films grown by co-sputtering at room temperature

Penetration depth and critical fields in superconducting NbTi thin films grown by co-sputtering at room temperature

Enhancement of superconductivity by organic flexible substrates in NbSe2 thin flakes

Penetration depth in dirty superconducting NbTiN thin films grown at room temperature

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Product

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Enhancement of superconductivity by organic flexible substrates in NbSe₂ thin flakes