Real time electron tunneling and pulse spectroscopy in carbon nanotube quantum dots.

Gotz, Georg; Steele, Gary A; Vos, Willem-Jan; Kouwenhoven, Leo P · Nano Lett · 2008

basic_science · Level V

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Abstract

We investigate a quantum dot (QD) in a carbon nanotube (CNT) in the regime where the QD is nearly isolated from the leads. An aluminum single electron transistor (SET) serves as a charge detector for the QD. We precisely measure and tune the tunnel rates into the QD in the range between 1 kHz and 1 Hz, using both pulse spectroscopy and real-time charge detection, and measure the excitation spectrum of the isolated QD.