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Title: Quantum confined acceptors and donors in InSe nanosheets

We report on the radiative recombination of photo-excited carriers bound at native donors and acceptors in exfoliated nanoflakes of nominally undoped rhombohedral γ-polytype InSe. The binding energies of these states are found to increase with the decrease in flake thickness, L. We model their dependence on L using a two-dimensional hydrogenic model for impurities and show that they are strongly sensitive to the position of the impurities within the nanolayer.
Authors:
; ; ;  [1] ; ;  [2] ;  [3] ; ;  [4]
  1. School of Physics and Astronomy, The University of Nottingham, Nottingham NG7 2RD (United Kingdom)
  2. Institute for Problems of Materials Science, The National Academy of Sciences of Ukraine, Chernivtsi 58001 (Ukraine)
  3. Nottingham Nanotechnology and Nanoscience Centre, The University of Nottingham, Nottingham NG7 2RD (United Kingdom)
  4. Physics Department, Lancaster University, Lancaster LA1 4YB (United Kingdom)
Publication Date:
OSTI Identifier:
22403373
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 22; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BINDING ENERGY; CHARGE CARRIERS; IMPURITIES; INDIUM SELENIDES; NANOSTRUCTURES; RECOMBINATION; SHEETS; TRIGONAL LATTICES; TWO-DIMENSIONAL CALCULATIONS