4.6 Article

Microwave spectroscopy of spin-orbit coupled states: Energy detuning vs interdot coupling modulation

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JOURNAL OF APPLIED PHYSICS
卷 128, 期 15, 页码 -

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AMER INST PHYSICS
DOI: 10.1063/5.0023122

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  1. CREST JST [JPMJCR15N2]
  2. JSPS KAKENHI [18K03479]
  3. Grants-in-Aid for Scientific Research [18K03479] Funding Source: KAKEN

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We study the AC field induced current peaks of a spin-blockaded double quantum dot with spin-orbit interaction. The AC field modulates either the interdot tunnel coupling or the energy detuning, and we choose the AC field frequency range to induce two singlet-triplet transitions giving rise to two current peaks. We show that for a large detuning, the two current peaks can be significantly stronger when the AC field modulates the tunnel coupling, thus making the detection of the spin-orbit gap more efficient. We also demonstrate the importance of the time dependence of the spin-orbit interaction.

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