Quantum Printing via the Inverse Faraday Effect in Electron–Hole Bilayers
Oral-In-person · Withdrawn
Abstract
We propose quantum printing (QP) of magnetization in electron-hole bilayers through the inverse Faraday effect (IFE), where circularly polarized light generates a static magnetization. The IFE response shows two limiting behaviors controlled by interlayer Coulomb coupling, reflected in the Coulomb drag resistance. In the weak-drag limit, the magnetization contributions from electrons and holes have the same sign, leading to a large net IFE. As interlayer coupling increases and excitonic (dipolar) correlations develop, Coulomb drag progressively suppresses the net response. Nevertheless, a finite IFE survives in the strong-drag limit whenever layer asymmetries such as unequal carrier concentrations or differing light-coupling strengths are present. Because the IFE depends strongly on the magnitude of interlayer Coulomb drag, QP of magnetization serves both as a route to light-controlled magnetization in bilayers and as a sensitive probe of the crossover from independent electron–hole fluids to strongly correlated excitonic states. We investigate the case of TMD bilayers, which realize the strong drag dependence with magnetizations of the order of one Bohr magneton per carrier.
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Publication: [1] Syljuåsen, E., Cardoso, G., Albar, E.I., Wong P., Rubio A., and Balatsky, A.V., 2025. In preparation.
[2] Aeppli, G., Balatsky, A.V., Bonetti, S., Cardoso, G., Raghu, S., Syljuåsen, E., Yeh, T.T., Lin, S.Z., Liu, Y., Weissenrieder, J. and Wong, P.J., 2025. Quantum Printing. arXiv preprint arXiv:2509.16792.
Presenters
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Gabriel Cardoso
- Nordita, Stockholm University, and KTH