Catalyst-Free Growth of Millimeter-Long Topological Insulator Bi2Se3 Nanoribbons and the Observation of pi Berry Phase

Abstract

We report the growth of single-crystalline Bi2Se3 nanoribbons with lengths up to several millimeters via a catalyst-free physical vapor deposition method. Scanning transmission electron microscopy analysis reveals that the nanoribbons grow along the (1120) direction. We obtain a detailed characterization of the electronic structure of the Bi2Se3 nanoribbons from measurements of Shubnikov-de Haas (SdH) quantum oscillations. Angular dependent magneto-transport measurements reveal a dominant two-dimensional contribution originating from surface states and weak contribution from the bulk states. The catalyst-free synthesis yields high-purity nanocrystals enabling the observation of a large number of SdH oscillation periods and allowing for an accurate determination of the pi-Berry phase, one of the key features of Dirac fermions in topological insulators. The long-length nanoribbons can empower the potential for fabricating multiple nanoelectronic devices on a single nanoribbon.

arXiv comment22 pages, 5 figures

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Cited by in corpus (12)

• Thermal Stability and Anisotropic Sublimation of Two-Dimensional Colloidal Bi2Te3 and Bi2Se3 Nanocrystals
• Crossover between Weak Antilocalization and Weak Localization of Bulk States in Ultrathin Bi2Se3 Films
• Band bending inversion in Bi${}_2$Se${}_3$ nanostructures
• Novel synthesis of topological insulator based nanostructures (Bi2Te3) demonstrating high performance photodetection
• Coexistence of bulk and surface states probed by Shubnikov-de Haas oscillations in Bi${}_2$Se${}_3$ with high charge-carrier density
• Pressure-induced Superconductivity in Zintl Topological Insulator SrIn2As2
• Strain-gradient induced topological transition in bent nanoribbons of the Dirac semimetal Cd3As2
• Magnetic Order in 3D Topological Insulators -- Wishful Thinking or Gateway to Emergent Quantum Effects?
• Orbit topology analysed from $\pi$ phase shift of magnetic quantum oscillations in three-dimensional Dirac semimetal
• NMR in an electric field: A bulk probe of the hidden spin and orbital polarizations
• Inhomogeneity identification by measuring magnetic quantum oscillations
• Phase-coherent loops in selectively-grown topological insulator nanoribbons