A Wigner crystal on helium shows nonlinear velocity saturation at 150 MHz, explained by Bragg-Cherenkov coupling to higher-order ripplon overtones.
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Self-doped Wigner crystals arise from preempted band-inversion transitions between commensurate crystals, as established by non-perturbative arguments and Hartree-Fock calculations in jellium and rhombohedral graphene models.
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High-frequency nonlinear conductivity of a Wigner crystal
A Wigner crystal on helium shows nonlinear velocity saturation at 150 MHz, explained by Bragg-Cherenkov coupling to higher-order ripplon overtones.
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Self-doped Crystal from Preempted Band-inversion Transitions
Self-doped Wigner crystals arise from preempted band-inversion transitions between commensurate crystals, as established by non-perturbative arguments and Hartree-Fock calculations in jellium and rhombohedral graphene models.