Electrical Read-Out of a Single Spin Using an Exchange-Coupled Quantum Dot.
basic_science · Level V
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- Record sourced from PubMed, PMID 28399370.
- Also identified by DOI 10.1021/acsnano.7b00451.
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Abstract
We present an original way of continuously reading-out the state of a single electronic spin. Our detection scheme is based on an exchange interaction between the electronic spin and a nearby read-out quantum dot. The coupling between the two systems results in a spin-dependent conductance through the read-out dot and establishes an all electrical and nondestructive single spin detection. With conductance variations up to 4% and read-out fidelities greater than 99.5%, this method represents an alternative to systems for which spin-to-charge conversion cannot be implemented. Using a semiclassical approach, we present an asymmetric exchange coupling model in good agreement with our experimental results.