Non-symmetric Pauli spin blockade in a silicon double quantum dot
Non-symmetric Pauli spin blockade in a silicon double quantum dot
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硅双量子点中的非对称泡利自旋封锁
DOI:
10.1038/s41534-024-00820-1
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发表时间:
2024
影响因子:
7.6
通讯作者:
Lundberg T
中科院分区:
文献类型:
--
作者:
Lundberg T
Spin qubits in gate-defined silicon quantum dots are receiving increased attention thanks to their potential for large-scale quantum computing. Readout of such spin qubits is done most accurately and scalably via Pauli spin blockade (PSB), however, various mechanisms may lift PSB and complicate readout. In this work, we present an experimental study of PSB in a multi-electron low-symmetry double quantum dot (DQD) in silicon nanowires. We report on the observation of non-symmetric PSB, manifesting as blockaded tunneling when the spin is projected to one QD of the pair but as allowed tunneling when the projection is done into the other. By analyzing the interaction of the DQD with a readout resonator, we find that PSB lifting is caused by a large coupling between the different electron spin manifolds of 7.90 μeV and that tunneling is incoherent. Further, magnetospectroscopy of the DQD in 16 charge configurations, enables reconstructing the energy spectrum of the DQD and reveals the lifting mechanism is energy-level selective. Our results indicate enhanced spin-orbit coupling which may enable all-electrical qubit control of electron spins in silicon nanowires.
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通讯作者:
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影响因子:
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DOI:
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发表时间:
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期刊:
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DOI:
--
发表时间:
2020
期刊:
International Electron Devices Meeting
影响因子:
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