Projekteja vuodessa
Abstrakti
We have studied 1/f noise in critical current Ic in h-BN encapsulated monolayer graphene contacted by NbTiN electrodes. The sample is close to diffusive limit and the switching supercurrent with hysteresis at Dirac point amounts to ≃ 5 nA. The low frequency noise in the superconducting state is measured by tracking the variation in magnitude and phase of a reflection carrier signal vrf at 600–650 MHz. We find 1/f critical current fluctuations on the order of δIc/ Ic≃ 10 - 3 per unit band at 1 Hz. The noise power spectrum of critical current fluctuations SIc measured near the Dirac point at large, sub-critical rf-carrier amplitudes obeys the law SIc/Ic2=a/fβ where a≃ 4 × 10 - 6 and β≃ 1 at f> 0.1 Hz. Our results point towards significant fluctuations in Ic originating from variation of the proximity induced gap in the graphene junction.
Alkuperäiskieli | Englanti |
---|---|
Artikkeli | 19900 |
Sivumäärä | 10 |
Julkaisu | Scientific Reports |
Vuosikerta | 11 |
Numero | 1 |
DOI - pysyväislinkit | |
Tila | Julkaistu - 6 lokak. 2021 |
OKM-julkaisutyyppi | A1 Julkaistu artikkeli, soviteltu |
Sormenjälki
Sukella tutkimusaiheisiin 'Critical current fluctuations in graphene Josephson junctions'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.Tietoaineistot
-
Critical current fluctuations in graphene Josephson junctions.
Haque, M. (Creator), Will, M. (Creator), Tomi, M. (Creator), Pandey, P. (Creator), Kumar, M. (Creator), Schmidt, F. (Creator), Watanabe, K. (Creator), Taniguchi, T. (Creator), Danneau, R. (Creator), Steele, G. (Creator) & Hakonen, P. (Creator), Zenodo, 2022
DOI - pysyväislinkki: 10.5281/zenodo.6190150
Tietoaineisto: Dataset
Projektit
- 4 Päättynyt
-
GrapheneCore2: Graphene Flagship Core Project 2
Lipsanen, H., Mustonen, P., Raju, R., Mackenzie, D., Shafi, A., Kim, M. & Khayrudinov, V.
01/04/2018 → 31/03/2020
Projekti: EU: Framework programmes funding
-
BOLOSO: Äärimmäisen herkät bolometrit turvallisuussovelluksiin
Hakonen, P., Tomi, M., Kamada, M., Manninen, J., Perelshtein, M., Zeng, W., Suresh, K., Kumar, M. & Will, M.
01/01/2018 → 31/08/2022
Projekti: Academy of Finland: Other research funding
-
1/f kohina
Hakonen, P., Will, M., Haque, M., Thanniyil Sebastian, A., Kamada, M., Sarkar, J. & Perelshtein, M.
01/09/2017 → 31/08/2021
Projekti: Academy of Finland: Other research funding