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Single-Shot Measurement of Triplet-Singlet Relaxation in a Si/SiGe Double Quantum Dot

Prance, J. R. and Shi, Zhan and Simmons, C. B. and Savage, D. E. and Lagally, M. G. and Schreiber, L. R. and Vandersypen, L. M. K. and Friesen, Mark and Joynt, Robert and Coppersmith, S. N. and Eriksson, M. A. (2012) Single-Shot Measurement of Triplet-Singlet Relaxation in a Si/SiGe Double Quantum Dot. Physical review letters, 108 (4). -. ISSN 0031-9007

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Abstract

We investigate the lifetime of two-electron spin states in a few-electron Si/SiGe double dot. At the transition between the (1,1) and (0,2) charge occupations, Pauli spin blockade provides a readout mechanism for the spin state. We use the statistics of repeated single-shot measurements to extract the lifetimes of multiple states simultaneously. When the magnetic field is zero, we find that all three triplet states have equal lifetimes, as expected, and this time is similar to 10 ms. When the field is nonzero, the T-0 lifetime is unchanged, whereas the T_ lifetime increases monotonically with the field, reaching 3 sec at 1 T.

Item Type: Article
Journal or Publication Title: Physical review letters
Subjects: Q Science > QC Physics
Departments: UNSPECIFIED
ID Code: 59552
Deposited By: ep_importer_pure
Deposited On: 26 Oct 2012 14:48
Refereed?: Yes
Published?: Published
Last Modified: 23 Jul 2014 15:07
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59552

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