Electronic properties of atomically coherent square PbSe nanocrystal superlattice resolved by Scanning Tunneling Spectroscopy
| Autor: | Capiod, Pierre, Van Der Sluijs, Maaike, De Boer, Jeroen, Delerue, Christophe, Swart, Ingmar, Vanmaekelbergh, Daniel, Sub Condensed Matter and Interfaces, Condensed Matter and Interfaces |
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| Přispěvatelé: | Debye Institute for Nanomaterials Science, Utrecht University [Utrecht], Physique - IEMN (PHYSIQUE - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), European Project: FIRST STEP, Sub Condensed Matter and Interfaces, Condensed Matter and Interfaces, Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Band gap Superlattice Scanning tunneling spectroscopy Bioengineering 02 engineering and technology semiconductors 010402 general chemistry 01 natural sciences materials law.invention chemistry.chemical_compound Condensed Matter::Materials Science law Taverne General Materials Science Electrical and Electronic Engineering [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] Spectroscopy Electronic band structure Lead selenide 2D Scanning Tunneling Spectroscopy Local density of states Condensed matter physics Mechanical Engineering 2D materials General Chemistry 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 0104 chemical sciences chemistry Mechanics of Materials nanocrystal superlattices scanning tunneling microscopy Scanning tunneling microscope 0210 nano-technology |
| Zdroj: | Nanotechnology Nanotechnology, 2021, 32 (32), pp.325706. ⟨10.1088/1361-6528/abfd57⟩ Nanotechnology, 32(32), 1. IOP PUBLISHING LTD Nanotechnology, Institute of Physics, 2021, 32 (32), pp.325706. ⟨10.1088/1361-6528/abfd57⟩ |
| ISSN: | 0957-4484 1361-6528 |
| DOI: | 10.1088/1361-6528/abfd57⟩ |
| Popis: | International audience; Rock-salt lead selenide nanocrystals can be used as building blocks for large scale square superlattices via two-dimensional assembly of nanocrystals at a liquid-air interface followed by oriented attachment. Here we report Scanning Tunneling Spectroscopy (STS) measurements of the local density of states of an atomically coherent superlattice with square geometry made from PbSe nanocrystals. Controlled annealing of the sample permits the imaging of a clean structure and to reproducibly probe the band gap and the valence hole and conduction electron states. The measured band gap and peak positions are compared to the results of optical spectroscopy and atomistic tight-binding calculations of the square superlattice band Electronic properties of atomically coherent square PbSe nanocrystal superlattice resolved by Scanning Tunne structure. In spite of the crystalline connections between nanocrystals that induce significant electronic couplings, the electronic structure of the superlattices remains very strongly influenced by the effects of disorder and variability. |
| Databáze: | OpenAIRE |
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