Strong THz field induces dynamical complex Berry phase in centrosymmetric MgO, resolved into real (intraband) and imaginary (tunneling) components by HHG spectroscopy on sub-cycle timescales.
Revealing the berry phase under the tunneling barrier.arXiv preprint arXiv:2408.03105, 2024
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Thickness tuning and terahertz perturbation separate high harmonic generation signals from surface and bulk states in Bi2Se3, revealing topological effects on the surface response.
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Disentangling High Harmonic Generation from Surface and Bulk States of a Topological Insulator
Thickness tuning and terahertz perturbation separate high harmonic generation signals from surface and bulk states in Bi2Se3, revealing topological effects on the surface response.