Chorley, SJ;
Wabnig, J;
Penfold-Fitch, ZV;
Petersson, KD;
Frake, J;
Smith, CG;
Buitelaar, MR;
(2012)
Measuring the complex admittance of a carbon nanotube double quantum dot.
Physical Review Letters
, 108
(3)
, Article 036802. 10.1103/PhysRevLett.108.036802.
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Abstract
We investigate radio-frequency (rf) reflectometry in a tunable carbon nanotube double quantum dot coupled to a resonant circuit. By measuring the in-phase and quadrature components of the reflected rf signal, we are able to determine the complex admittance of the double quantum dot as a function of the energies of the single-electron states. The measurements are found to be in good agreement with a theoretical model of the device in the incoherent limit. In addition to being of fundamental interest, our results present an important step forward towards noninvasive charge and spin state readout in carbon nanotube quantum dots.
| Type: | Article |
|---|---|
| Title: | Measuring the complex admittance of a carbon nanotube double quantum dot. |
| Location: | US |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.108.036802 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.108.036802 |
| Language: | English |
| Additional information: | © 2012 American Physical Society |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1366975 |
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