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The suitability of carbon nanotubes to rf-SET work stems from the fact that
their Coulomb energy is relatively large , easily in the range of 20 K.
Simultaneously, their resistance can be kept not too far from the quantum
resistance ~26.5 kOhm.In this case, according to our sensitivity
analysis, they may heat up to 2 K, and their modulation efficiency with
respect to gate charge is not degraded much. Hence they can be used in
charge measurements where the power dissipation is substantial, like in the rf-SET measurements |
 Conductance modulation plots measured
for two multiwalled nanotube rf-SETs. Sample I with diameter d = 4 nm and
Sample II d = 12 nm.
Comparison of estimated charge sensitivity to the actual measured
sensitivity. The two first columns correspond to the samples in the upper
picture. |
