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Article Dans Une Revue Physical Review Research Année : 2020

Characterization of helical Luttinger liquids in microwave stepped-impedance edge resonators

Hiroshi Kamata
Jean-Marc Berroir
Gwendal Fève
Bernard Plaçais
Erwann Bocquillon
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Résumé

Coulomb interaction has important consequences for the physics of quantum spin Hall edge states, weakening the topological protection via two-particle scattering and renormalizing both the velocity and the charge of collective plasmon modes compared to that of free electrons. Despite these effects, interactions remain difficult to quantify. We propose here simple and robust edge resonator geometries to characterize Coulomb interaction by means of high-frequency measurements. They rely on a transmission line approach and take advantage of the impedance mismatch between the edge states and their microwave environment.
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Dates et versions

hal-03367944 , version 1 (06-10-2021)

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Alexandre Gourmelon, Hiroshi Kamata, Jean-Marc Berroir, Gwendal Fève, Bernard Plaçais, et al.. Characterization of helical Luttinger liquids in microwave stepped-impedance edge resonators. Physical Review Research, 2020, 2, ⟨10.1103/physrevresearch.2.043383⟩. ⟨hal-03367944⟩
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