An ultrasensitive radio-frequency single-electron transistor working up to 4.2 K

Brenning, Henrik and Kafanov, Sergey and Duty, Tim and Kubatkin, Sergey and Delsing, Per (2006) An ultrasensitive radio-frequency single-electron transistor working up to 4.2 K. Journal of Applied Physics, 100 (11): 114321. ISSN 0021-8979

Abstract

We present the measurement of a radio-frequency single-electron transistor that displays a very high charge sensitivity of 1.9 μe Hz at 4.2 K. At 40 mK, the charge sensitivity is 0.9 and 1.0 μe Hz in the superconducting and normal state, respectively. The sensitivity was measured as a function of radio frequency amplitude at three different temperatures; 40 mK, 1.8, and 4.2 K.