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- W2039092975 abstract "Double quantum dots are convenient solid-state platforms to encode quantum information. Two-electron spin states can be conveniently detected and manipulated using strong quantum selection rules based on the Pauli exclusion principle, leading to the well-know Pauli spin blockade of electron transport for triplet states. Coherent spin states would be optimally preserved in an environment free of nuclear spins, which is achievable in silicon by isotopic purification. Here we report on a deliberately engineered, gate-defined silicon metal-oxide-semiconductor double quantum dot system. The electron occupancy of each dot and the inter-dot tunnel coupling are independently tunable by electrostatic gates. At weak inter-dot coupling we clearly observe Pauli spin blockade and measure a large intra-dot singlet-triplet splitting $>$ 1 meV. The leakage current in spin blockade has a peculiar magnetic field dependence, unrelated to electron-nuclear effects and consistent with the effect of spin-flip cotunneling processes. The results obtained here provide excellent prospects for realizing singlet-triplet qubits in silicon." @default.
- W2039092975 created "2016-06-24" @default.
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- W2039092975 date "2011-10-07" @default.
- W2039092975 modified "2023-10-03" @default.
- W2039092975 title "Pauli Spin Blockade in a Highly Tunable Silicon Double Quantum Dot" @default.
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- W2039092975 doi "https://doi.org/10.1038/srep00110" @default.
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