skip to main content

SciTech ConnectSciTech Connect

Title: Heteroepitaxial growth and surface structure of L1{sub 0}-MnGa(111) ultra-thin films on GaN(0001)

L1{sub 0}-structured MnGa(111) ultra-thin films were heteroepitaxially grown on GaN(0001) under lightly Mn-rich conditions using molecular beam epitaxy. Room-temperature scanning tunneling microscopy (STM) investigations reveal smooth terraces and angular step edges, with the surface structure consisting primarily of a 2 × 2 reconstruction along with small patches of 1 × 2. Theoretical calculations were carried out using density functional theory, and the simulated STM images were calculated using the Tersoff-Hamman approximation, revealing that a stoichiometric 1 × 2 and a Mn-rich 2 × 2 surface structure give the best agreement with the observed experimental images.
Authors:
; ; ; ;  [1] ; ;  [1] ;  [2] ;  [1] ;  [3]
  1. Department of Physics and Astronomy, Nanoscale and Quantum Phenomena Institute, Ohio University, Athens, Ohio 45701 (United States)
  2. (Mexico)
  3. (Saudi Arabia)
Publication Date:
OSTI Identifier:
22217901
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 16; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; APPROXIMATIONS; DENSITY FUNCTIONAL METHOD; GALLIUM ALLOYS; GALLIUM NITRIDES; IMAGES; MANGANESE ALLOYS; MOLECULAR BEAM EPITAXY; SCANNING TUNNELING MICROSCOPY; SIMULATION; STOICHIOMETRY; SURFACES; THIN FILMS