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Tomonaga-Luttinger liquid parameters of magnetic waveguides in graphene

Häusler, W., De Martino, A., Ghosh, T. K. & Egger, R. (2008). Tomonaga-Luttinger liquid parameters of magnetic waveguides in graphene. Physical Review B (PRB), 78(16), article number 165402. doi: 10.1103/physrevb.78.165402


Electronic waveguides in graphene formed by counterpropagating snake states in suitable inhomogeneous magnetic fields are shown to constitute a realization of a Tomonaga-Luttinger liquid. Due to the spatial separation of the right- and left-moving snake states, this non-Fermi liquid state induced by electron-electron interactions is essentially unaffected by disorder. We calculate the interaction parameters accounting for the absence of Galilei invariance in this system, and thereby demonstrate that non-Fermi liquid effects are significant and tunable in realistic geometries.

Publication Type: Article
Additional Information: 10 pages, 5 figures, published version
Subjects: Q Science > QC Physics
Departments: School of Science & Technology > Mathematics
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