Epitaxial Growth of Quasi-One-Dimensional Bismuth-Halide Chains with Topological Non-Trivial Edge States

Abstract

Quantum spin Hall insulators have one-dimensional (1D) spin-momentum locked topological edge states (ES) inside the bulk band gap, which can serve as dissipationless channels for the practical applications in low consumption electronics and high performance spintronics. However, the clean and atomically sharp ES serving as ideal 1D conducting channels are still lack. Here, we report the formation of the quasi-1D Bi4I4 nanoribbons on the surface of Bi(111) with the support of the graphene-terminated 6H-SiC(0001) and the direct observations of the topological ES at the step edge by scanning tunneling microscopy and spectroscopic-imaging results. The ES reside surround the edge of Bi4I4 nanoribbons and exhibits remarkable robustness against non time reversal symmetry perturbations. The theoretical simulations verify the topological non-trivial character of 1D ES, which is retained after considering the presence of the underlying Bi(111). Our study supports the existence of topological ES in Bi4I4 nanoribbons, paving the way to engineer the novel topological features by using the nanoribbons as the 1D building block.

References in corpus (34)

• Topological Insulators
• Topological insulators and superconductors
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• WannierTools: An open-source software package for novel topological materials
• Quantum Spin Hall Effect
• Epitaxial Growth of Two-Dimensional Stanene
• Bismuthene on a SiC Substrate: A Candidate for a New High-Temperature Quantum Spin Hall Paradigm
• Evidence for Helical Edge Modes in Inverted InAs/GaSb Quantum Wells
• An equivalent expression of Z2 Topological Invariant for band insulators using Non-Abelian Berry's connection
• Realization of Quantum Spin Hall State in Monolayer 1T'-WTe2
• One-dimensional Topological Edge States of Bismuth Bilayers
• Angle Dependent Van Hove Singularities in Slightly Twisted Graphene Bilayer
• Electronic Evidence of Temperature-Induced Lifshitz Transition and Topological Nature in ZrTe5
• Electric Field-Tuned Topological Phase Transition in Ultra-Thin Na3Bi - Towards a Topological Transistor
• Robust topological edge states at the perfect surface step edge of topological insulator ZrTe${}_5$
• Large-Gap Quantum Spin Hall Insulator in single layer bismuth monobromide Bi${}_4$Br${}_4$
• Observation of topological states residing at step edges of WTe2
• Material design with the van der Waals stacking of bismuth-halide chains realizing a higher-order topological insulator
• Discovery of switchable weak topological insulator state in quasi-one-dimensional bismuth iodide
• Quantum-spin-Hall insulator with a large gap: single-layer 1T' WSe${}_2$
• Evidence for a strain tuned topological phase transition in ZrTe5
• Observation of Topologically Protected States at Crystalline Phase Boundaries in Single-layer WSe2
• Direct Visualization of 2D Topological Insulator in Single-layer 1T'-WTe2
• Experimental evidence of large-gap two-dimensional topological insulator on the surface of ZrTe5
• Sub-nm wide electron channels protected by topology
• A Novel Quasi-One-Dimensional Topological Insulator in Bismuth Iodide $\beta$-Bi${}_4$I${}_4$
• Weak Topological Insulators and Composite Weyl Semimetals: $\beta$-Bi${}_4$X${}_4$ (X=Br, I)
• Observation and control of the weak topological insulator state in ZrTe5
• Two dimensional topological insulators with tunable band gaps: HgTe and HgSe monolayers
• Topological edge states in single- and multi-layer Bi${}_4$Br${}_4$
• Dimensional Crossover and Topological Phase Transition in Dirac Semimetal Na3Bi Films

Cited by in corpus (7)

• Topology hierarchy of transition metal dichalcogenides built from quantum spin Hall layers
• Facet Dependent Topological Phase Transition in Bi4Br4
• Optical bulk-boundary dichotomy in a quantum spin Hall insulator
• A robust weak topological insulator in a bismuth halide Bi4Br2I2
• Topological Phase Transition in Quasi-One-Dimensional Bismuth Iodide Bi4I4
• Mass Acquisition of Dirac Fermions in Bi4I4 by Spontaneous Symmetry Breaking
• Field manipulation of Weyl modes in an ideal Dirac semimetal