We have studied resonant tunneling transistors (RTT) made of single-walled carbon nanotube quantum dots in the Fabry–Pérot regime. We show sensitivity to input charge as high as 5×10 exp −6 e/Hz1/2 with a carrier frequency of 719 MHz at 4.2 K. This result is comparable to the best values of charge sensitivity so far reported for radio frequency single electron transistors (rf-SET). Unlike SETs, whose operating temperature is limited as Coulomb blockade vanishes as 1/T, a RTT can operate at higher temperatures, since the dephasing length lϕ∝1/T exp 2/exp 3.
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机译：我们已经研究了法布里-佩罗特体制中由单壁碳纳米管量子点制成的共振隧穿晶体管（RTT）。我们显示了对输入电荷的敏感度高达5×10 exp -6 e / Hz1 / 2，在4.2 K时的载波频率为719 MHz。这一结果与迄今为止针对射频单电子所报告的最佳电荷敏感度值相当晶体管（RF-SET）。与SET不同，SET的工作温度受到库仑封锁的限制仅以1 / T消失，而RTT可以在更高的温度下运行，因为移相长度为lϕ∝1 / T exp 2 / exp 3。
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