Display options
Cite
Busl M, Granger G, Gaudreau L, et al. Bipolar spin blockade and coherent state superpositions in a triple quantum dot. Nat Nanotechnol. 2013;8(4):261-5doi: 10.1038/nnano.2013.7.
Busl, M., Granger, G., Gaudreau, L., Sánchez, R., Kam, A., Pioro-Ladrière, M., Studenikin, S. A., Zawadzki, P., Wasilewski, Z. R., Sachrajda, A. S., & Platero, G. (2013). Bipolar spin blockade and coherent state superpositions in a triple quantum dot. Nature nanotechnology, 8(4), 261-5. https://doi.org/10.1038/nnano.2013.7
Busl, M, et al. "Bipolar spin blockade and coherent state superpositions in a triple quantum dot." Nature nanotechnology vol. 8,4 (2013): 261-5. doi: https://doi.org/10.1038/nnano.2013.7
Busl M, Granger G, Gaudreau L, Sánchez R, Kam A, Pioro-Ladrière M, Studenikin SA, Zawadzki P, Wasilewski ZR, Sachrajda AS, Platero G. Bipolar spin blockade and coherent state superpositions in a triple quantum dot. Nat Nanotechnol. 2013 Apr;8(4):261-5. doi: 10.1038/nnano.2013.7. Epub 2013 Feb 17. PMID: 23416792.
Copy Download .nbib Format: NLM
Share it on

Nat Nanotechnol. 2013 Apr;8(4):261-5. doi: 10.1038/nnano.2013.7. Epub 2013 Feb 17.

Bipolar spin blockade and coherent state superpositions in a triple quantum dot.

Nature nanotechnology

M Busl, G Granger, L Gaudreau, R Sánchez, A Kam, M Pioro-Ladrière, S A Studenikin, P Zawadzki, Z R Wasilewski, A S Sachrajda, G Platero

Affiliations

  1. Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain.

PMID: 23416792 DOI: 10.1038/nnano.2013.7

Abstract

Spin qubits based on interacting spins in double quantum dots have been demonstrated successfully. Readout of the qubit state involves a conversion of spin to charge information, which is universally achieved by taking advantage of a spin blockade phenomenon resulting from Pauli's exclusion principle. The archetypal spin blockade transport signature in double quantum dots takes the form of a rectified current. At present, more complex spin qubit circuits including triple quantum dots are being developed. Here we show, both experimentally and theoretically, that in a linear triple quantum dot circuit the spin blockade becomes bipolar with current strongly suppressed in both bias directions and also that a new quantum coherent mechanism becomes relevant. In this mechanism, charge is transferred non-intuitively via coherent states from one end of the linear triple dot circuit to the other, without involving the centre site. Our results have implications for future complex nanospintronic circuits.

References

  1. Science. 2005 Sep 30;309(5744):2180-4 - PubMed
  2. Science. 2005 Aug 26;309(5739):1346-50 - PubMed
  3. Phys Rev Lett. 2000 Nov 6;85(19):4148-51 - PubMed
  4. Phys Rev Lett. 2007 Feb 2;98(5):050502 - PubMed
  5. Science. 2002 Aug 23;297(5585):1313-7 - PubMed

Publication Types