期刊
PHYSICAL REVIEW B
卷 100, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.100.085412
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资金
- Deutsche Forschungs-gemeinschaft (DFG) [SFB767]
- CAP Konstanz
- FlagERA through iSpinText
- NKFIH within the Quantum Technology National Excellence Program [2017-1.2.1-NKP-2017-00001]
- Hungarian Scientific Research Fund, OTKA [NN 127903]
- OTKA Grants [PD123927, K123894]
We propose an interband tunneling picture to explain and predict the interlayer twist-angle dependence of the induced spin-orbit coupling in heterostructures of graphene and monolayer transition metal dichalcogenides (TMDCs). We obtain a compact analytic formula for the induced valley Zeeman and Rashba spin-orbit coupling in terms of the TMDC band structure parameters and interlayer tunneling matrix elements. We parametrize the tunneling matrix elements with few parameters, which in our formalism are independent of the twist angle between the layers. We estimate the value of the tunneling parameters from existing density functional theory calculations at zero twist angle and we use them to predict the induced spin-orbit coupling at nonzero angles. Provided that the energy of the Dirac point of graphene is close to the TMDC conduction band, we expect a sharp increase of the induced spin-orbit coupling around a twist angle of 18 degrees.
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