Abstract
We report on the single-shot readout of three two-electron spin states—a singlet and two triplet substates—whose components of spin angular momentum are 0 and , in a gate-defined GaAs single quantum dot. The three spin states are distinguished by detecting spin-dependent tunnel rates that arise from two mechanisms: spin filtering by spin-resolved edge states and spin-orbital correlation with orbital-dependent tunneling. The three states form one ground state and two excited states, and we observe the spin relaxation dynamics among the three spin states.
- Received 6 March 2016
DOI:https://doi.org/10.1103/PhysRevLett.117.236802
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