skip to main content

Title: Molecular beam epitaxial growth of Bi{sub 2}Se{sub 3} nanowires and nanoflakes

Topological Insulators are in focus of immense research efforts and rapid scientific progress is obtained in that field. Bi{sub 2}Se{sub 3} has proven to be a topological insulator material that provides a large band gap and a band structure with a single Dirac cone at the Γ-point. This makes Bi{sub 2}Se{sub 3} one of the most promising three dimensional topological insulator materials. While Bi{sub 2}Se{sub 3} nanowires and nanoflakes so far were fabricated with different methods and for different purposes, we here present the first Bi{sub 2}Se{sub 3} nanowires as well as nanoflakes grown by molecular beam epitaxy. The nanostructures were nucleated on pretreated, silicon (100) wafers. Altering the growth conditions nanoflakes could be fabricated instead of nanowires; both with high crystalline quality, confirmed by scanning electron microscopy as well as transmission electron microscopy. These nanostructures have promise for spintronic devices and Majorana fermion observation in contact to superconductor materials.
Authors:
; ;  [1] ;  [1] ;  [2]
  1. Technische Physik and Wilhelm Conrad Röntgen Research Center for Complex Material Systems Universität Würzburg, Am Hubland, D-97074 Würzburg (Germany)
  2. (United Kingdom)
Publication Date:
OSTI Identifier:
22350818
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BISMUTH SELENIDES; CRYSTAL GROWTH; DIELECTRIC MATERIALS; EQUIPMENT; FERMIONS; MAJORANA THEORY; MOLECULAR BEAM EPITAXY; NANOWIRES; QUANTUM WIRES; SCANNING ELECTRON MICROSCOPY; SILICON; SUPERCONDUCTORS; THREE-DIMENSIONAL CALCULATIONS; TRANSMISSION ELECTRON MICROSCOPY