University of Nottingham logo, linking to repository homepage
      View Item 
      • Nottingham Research Data Management Repository
      • University of Nottingham Research Data Management Service
      • public research data
      • View Item
      • Nottingham Research Data Management Repository
      • University of Nottingham Research Data Management Service
      • public research data
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      The direct-to-indirect band gap crossover in two-dimensional van der Waals indium selenide crystals

      Thumbnail
      View/Open
      DFT_BandGap_EnergyShift_versus_L (335bytes)
      DFT_InSe_1Layer.dat (107.6Kb)
      DFT_InSe_5Layer.dat (171.6Kb)
      DFT_InSe_10Layer.dat (328.1Kb)
      DFT_VBSplitting_versus_L.dat (144bytes)
      Exp_RTPLIntensity_versus_L.dat (967bytes)
      Exp1_BandGap_EnergyShift_versus_L.dat (135bytes)
      Exp2_BandGap_EnergyShift_versus_L.dat (7.348Kb)
      LLs_Electrons_Of_InSe_1layer.dat (14.11Mb)
      LLs_Electrons_Of_InSe_5layer.dat (14.19Mb)
      LowTPL_4Layers.dat (43.07Kb)
      LowTPL_10Layers.dat (46.11Kb)
      LowTPL_24Layers.dat (16.79Kb)
      PL5Layers_DiamagneticShift_X1X2_4K.dat (335bytes)
      PL5Layers_versusMagneticField_4K.dat (126.0Kb)
      PLBulkFlake_DiamagneticShift_4K.dat (134bytes)
      PLBulkFlake_versusMagneticField_4K.dat (159.7Kb)
      PLQD_versusMagneticField_4K.dat (161.1Kb)
      PLQD1_B0T4K.dat (45.58Kb)
      QD_DiamagneticShifts.dat (368bytes)
      Ratio_X2X1_versusB_4K.dat (314bytes)
      RTPL_4Layers.dat (89.72Kb)
      RTPL_10Layers.dat (51.45Kb)
      RTPL_24Layers.dat (16.79Kb)
      Publication date
      2017-01-03
      Creators
      Patane, Amalia
      Metadata
      Show full item record
      Description
      The electronic band structure of van der Waals (vdW) layered crystals has properties that depend on the composition, thickness and stacking of the component layers. Here we use density functional theory and high field magneto-optics to investigate the metal chalcogenide InSe, a recent addition to the family of vdW layered crystals, which transforms from a direct to an indirect band gap semiconductor as the number of layers is reduced. We investigate this direct-to-indirect bandgap crossover, demonstrate a highly tuneable optical response from the near infrared to the visible spectrum with decreasing layer thickness down to 2 layers, and report quantum dot-like optical emissions distributed over a wide range of energy. Our analysis also indicates that electron and exciton effective masses are weakly dependent on the layer thickness and are significantly smaller than in other vdW crystals. These properties are unprecedented within the large family of vdW crystals and demonstrates the potential of InSe for electronic and photonic technologies.
      External URI
      • https://rdmc.nottingham.ac.uk/handle/internal/72
      DOI
      • http://doi.org/10.17639/nott.69
      Related publication DOI
      • 10.1038/srep39619
      Links
      • http://www.nature.com/articles/srep39619
      • http://doi.org/10.17639/nott.69
      Subjects
      • Indium compounds
      • Semiconductors -- Optical properties
      • Energy-band theory of solids
      • Layer structure (Solids)
      • Magnetooptics
      • Physical sciences::Physics::Optical physics, Laser physics
      • Q Science::QC Physics::QC170 Atomic physics. Constitution and properties of matter
      • Q Science::QC Physics::QC350 Optics. Light, including spectroscopy
      • Q Science::QC Physics::QC501 Electricity and magnetism
      Divisions
      • University of Nottingham, UK Campus::Faculty of Science::School of Physics and Astronomy
      Deposit date
      2017-01-03
      Data type
      ASCII Data experiment and theory
      Funders
      • Engineering & Physical Sciences Research Council
      • Other
      • The Royal Society
      • EU Graphene Flagship
      Collection dates
      • 2014-2016
      Resource languages
      • en
      Publisher
      The University of Nottingham

      Browse

      All of Nottingham Research Data Management RepositoryBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

      My Account

      UoN Login

      Arkivum Files

      My Downloads

      Statistics

      Most Popular ItemsStatistics by CountryMost Popular Authors
       

      Research @ The University of Nottingham

      King's Meadow Campus

      Lenton Lane

      Nottingham, NG7 2NR

      For further information and policies refer to https://www.nottingham.ac.uk/library/research/research-data-management/index.aspx

      For further information and policies refer to Policies

      For information on accessibility refer to https://www.nottingham.ac.uk/utilities/accessibility/dspace.aspx

      and the Accessibility Statement