Facet Dependent Topological Phase Transition in Bi4Br4

Abstract

The realization of the coexistence of various topologically nontrivial surface states in one material is expected to lay a foundation for new electric applications with selective robust spin current. Here we apply the magnetoconductivity characteristic and angle-resolved photoemission spectroscopy (ARPES) to visualize the surface-selected electronic features evolution of quasi-one-dimensional material Bi4Br4. The transport measurements indicate the quantum interference correction to conductivity possesses symbolic spin rotational characteristic correlated to the value of Berry phase with the effects of weak localization and weak antilocalization for (001) and (100) surfaces, respectively. The ARPES spectra provide the experimental evidence for quasi-one-dimensional massless Dirac surface state at the side (100) surface and anisotropic massive Dirac surface state at the top (001) surface, respectively, which is highly coincide with the angle-dependent scaling behavior of magnetoconductivity. Our results reveal the facet dependent topological phases in quasi-one-dimensional Bi4Br4, stimulating the further investigations of this dual topology classes and the applications of the feasible technologies of topological spintronics.

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Cited by in corpus (9)

• Topological electronic structure and spin texture of quasi-one-dimensional higher-order topological insulator Bi4Br4
• Towards Layer-Selective Quantum Spin Hall Channels in Weak Topological Insulator Bi4Br2I2
• Optical bulk-boundary dichotomy in a quantum spin Hall insulator
• Coalescence of multiple topological orders in quasi-one-dimensional bismuth halide chains
• 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
• Quantum Coherent Transport of 1D ballistic states in second order topological insulator Bi${}_4$Br${}_4$