Dirac States in an Inclined Two-Dimensional Su-Schrieffer-Heeger Model

Abstract

We propose to realize Dirac states in an inclined two-dimensional Su-Schrieffer-Heeger model on a square lattice. We show that a pair of Dirac points protected by space-time inversion symmetry appear in the semimetal phase. The locations of these Dirac points are not pinned to any high-symmetry points of the Brillouin zone but are tunable through parameter modulations. Interestingly, the merging of two Dirac points undergoes a topological phase transition that leads to either a weak topological insulator or a nodal-line semimetal. We provide a systematic analysis of these topological phases from both bulk and boundary perspectives combined with symmetry arguments. We also discuss feasible experimental platforms to realize our model.

References updated. Published version

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Cited by in corpus (9)

• Klein-bottle quadrupole insulators and Dirac semimetals
• Cataloging topological phases of $N$-stacked Su-Schrieffer-Heeger chains by a systematic breaking of symmetries
• Floating Edge Bands in the Bernevig-Hughes-Zhang model with Altermagnetism
• Tunable Dirac points in a two-dimensional non-symmorphic wallpaper group lattice
• Family of third-order topological insulators from Su-Schrieffer-Heeger stacking
• Altermagnetism and its induced higher-order topology on the Lieb lattice
• Topological defect-mediated corner states and higher-order bulk topology in a two-dimensional crystalline insulator
• Characterization of the 2D Su-Schrieffer-Heeger Model with Second-Nearest-Neighbor Interactions
• Universal transition of spectral fluctuation in particle-hole symmetric system