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Band-bending induced by charged defects and edges of atomically thin transition metal dichalcogenide films

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  • معلومة اضافية
    • Contributors:
      Nano-Electronique Quantique et Spectroscopie (NEEL - QuNES); Institut Néel (NEEL); Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ); Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G); Institut National des Sciences Appliquées - Toulouse (INSA Toulouse); Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3); Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ); SPINtronique et TEchnologie des Composants (SPINTEC); Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut de Recherche Interdisciplinaire de Grenoble (IRIG); Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA); ANR-14-CE26-0017,MoS2ValleyControl,Propriétés optiques et de transport dans des mono-couches de MoS2 et discpositifs associés(2014); European Project: 604391,EC:FP7:ICT,FP7-ICT-2013-FET-F,GRAPHENE(2013); European Project: 320590,EC:FP7:ERC,ERC-2012-ADG_20120216,MOMB(2013)
    • بيانات النشر:
      CCSD
      IOP Publishing
    • الموضوع:
      2018
    • Collection:
      Université Grenoble Alpes: HAL
    • نبذة مختصرة :
      International audience ; We report scanning tunneling microscopy/spectroscopy (STM/STS) investigations of the bandbendingin the vicinity of charged point defects and edges of monolayer MoSe$_2$ and mono- andtrilayer WSe$_2$ films deposited on graphitized silicon carbide substrates. By tracing the spatialevolution of the structures of the STS spectra, we evaluate the magnitude and the extent of theband-bending to be equal to few hundreds milielectronvolts and several nanometres, respectively.With the aid of a simple electrostatic model, we show that the spatial variation of the Coulombpotential close to the film edges can be well reproduced by taking into account the metallic screeningby graphene. Additionally, the analysis of our data for trilayer WSe$_2$ provides reasonable estimationsof its dielectric constant ($\epsilon_{WSe}$$_2$ = 20) and of the magnitude of the charge trapped at the defect site(Q = $+e$).
    • Relation:
      info:eu-repo/grantAgreement/EC/FP7/604391/EU/Graphene-Based Revolutions in ICT And Beyond/GRAPHENE; info:eu-repo/grantAgreement/EC/FP7/320590/EU/Magneto-optics of layered materials: exploring many-body physics in electronic systems with unconventional bands/MOMB
    • الرقم المعرف:
      10.1088/2053-1583/aac65a
    • الدخول الالكتروني :
      https://hal.science/hal-01813835
      https://doi.org/10.1088/2053-1583/aac65a
    • الرقم المعرف:
      edsbas.578844B2