| year |
2015 |
| author(s) |
M. Kumar, A. Laitinen, D. Cox, P.J. Hakonen |
| title |
Ultra low 1/f noise in suspended bilayer graphene |
| document type |
Paper |
| source |
applied physics letters 106 26, 1-5 |
| doi |
10.1063/1.4923190
|
| EMP/Horizon2020 |
This publication does not include a EMP/Horizon2020 acknowledgement. |
| abstract |
We have studied 1/f noise power SI in suspended bilayer graphene devices. Around the Dirac point, we observe ultra low noise amplitude on the order of f*SI/I2b=10−9 . The low frequency noise level is barely sensitive to intrinsic carrier density, but temperature and external doping are found to influence the noise power. In our current-annealed samples, the 1/f noise is dominated by resistance fluctuations at the contacts. Temperature dependence of the 1/f noise suggests the presence of trap states in the contact regions, with a nearly exponential distribution function displaying a characteristic energy of 0.12â€â€V. At 80â€â€, the noise displays an air pressure sensitivity that corresponds to ∼0.3 ppm gas detection sensitivity; this indicates the potential of suspended graphene as a platform for gas sensing applications. |
