Nodal semimetals in d≥3 to sharp pseudo-Landau levels by dimensional reduction
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
Nonuniform strain applied to graphene's honeycomb lattice can induce pseudo-Landau levels in the single-particle spectrum. Various generalizations have been put forward, including a particular family of hopping models in d space dimensions. Here we show that the key ingredient for sharp pseudo-Landau levels in higher dimensions is dimensional reduction. We consider particles moving on a d-dimensional hyperdiamond lattice which displays a semimetallic band structure, with a (d-2)-dimensional nodal manifold. By applying a suitable strain pattern, the single-particle spectrum evolves into a sequence of relativistic Landau levels. We develop and solve the corresponding field theory: Each nodal point effectively generates a Landau-level problem which is strictly two dimensional to leading order in the applied strain. While the effective pseudovector potential varies across the nodal manifold, the Landau-level spacing does not. Our theory paves the way for strain engineering of single-particle states via dimensional reduction and beyond global minimal coupling.
Details
Originalsprache | Englisch |
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Aufsatznummer | 075123 |
Fachzeitschrift | Physical Review B |
Jahrgang | 109 |
Ausgabenummer | 7 |
Publikationsstatus | Veröffentlicht - 15 Feb. 2024 |
Peer-Review-Status | Ja |