Complex Phase-Fluctuation Effects Correlated with Granularity in Superconducting NbN Nanofilms
Abstract
:1. Introduction
2. Materials And Methods
2.1. Deposition
2.2. Fabrication of the Hall Bar
2.3. Electrical Characterization
3. Results
3.1. Superconducting State Properties
3.2. Berezinskii–Kosterlitz–Thouless Transition
3.3. Phase Slips
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
Abbreviations
SC | Superconducting |
BKT | Berezinskii–Kosterlitz–Thouless |
PS | Phase slip |
TAPS | Thermally activated phase slips |
QPS | Quantum phase slips |
NCP | Nano-conducting path |
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Sample | ( cm) | (K) | (K) | (MA/cm) |
---|---|---|---|---|
MO5a * | 8.0 × | 10.072 | 0.08 | 0.40 ± 0.014 |
MO5b ** | 5.8 × | 11.02 | 0.79 | 2.24 ± 0.013 |
MO10 | 1.2 × | 13.29 | 0.27 | 9.98 ± 0.15 |
MO15 | 2.4 × | 13.83 | 0.23 | 11.40 ± 0.016 |
SC5 | 8.0 × | 10.64 | 0.43 | 0.90 ± 0.010 |
SC10 | 2.4 × | 13.50 | 0.40 | 10 ± 0.028 |
SC15 | 1.7 × | 12.73 | 0.24 | 5.29 ± 0.08 |
SR5 ** | 1.1 × | 11.76 | 0.68 | 0.63 ± 0.013 |
SR10 | 1.7 × | 12.43 | 0.30 | 8.3 ± 0.18 |
SR15 | 2.3 × | 12.58 | 0.38 | 6.14 ± 0.13 |
SO5 | 9.3 × | 9.40 | 0.46 | 0.89 ± 0.024 |
Sample | (K) | (K) ** | () | ||
---|---|---|---|---|---|
MO5a | 9.70 ± 0.03 | 9.90 | 502.30 ± 0.01 | 0.970 ± 0.002 | 10.28 ± 0.030 |
MO5b | 10.30 ± 0.02 | 10.60 | 620 ± 1.06 | 1.500 ± 0.005 | 11.49 ± 0.022 |
MO10 | 13.060 ± 0.008 | 13.31 | 129.8 ± 0.60 | 1.56 ± 0.09 | 25.5 ± 0.11 |
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Sharma, M.; Singh, M.; Rakshit, R.K.; Singh, S.P.; Fretto, M.; De Leo, N.; Perali, A.; Pinto, N. Complex Phase-Fluctuation Effects Correlated with Granularity in Superconducting NbN Nanofilms. Nanomaterials 2022, 12, 4109. https://doi.org/10.3390/nano12234109
Sharma M, Singh M, Rakshit RK, Singh SP, Fretto M, De Leo N, Perali A, Pinto N. Complex Phase-Fluctuation Effects Correlated with Granularity in Superconducting NbN Nanofilms. Nanomaterials. 2022; 12(23):4109. https://doi.org/10.3390/nano12234109
Chicago/Turabian StyleSharma, Meenakshi, Manju Singh, Rajib K. Rakshit, Surinder P. Singh, Matteo Fretto, Natascia De Leo, Andrea Perali, and Nicola Pinto. 2022. "Complex Phase-Fluctuation Effects Correlated with Granularity in Superconducting NbN Nanofilms" Nanomaterials 12, no. 23: 4109. https://doi.org/10.3390/nano12234109