Electronic structure of atomically coherent ...
Document type :
Compte-rendu et recension critique d'ouvrage
Title :
Electronic structure of atomically coherent square semiconductor superlattices with dimensionality below two
Author(s) :
Kalesaki, Efterpi [Auteur]
Université du Luxembourg = University of Luxembourg = Universität Luxemburg [uni.lu]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Evers, Wiel H. [Auteur]
Delft University of Technology [TU Delft]
Allan, Guy [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Vanmaekelbergh, Daniel [Auteur]
Debye Institute for Nanomaterials Science
Delerue, Christophe [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Université du Luxembourg = University of Luxembourg = Universität Luxemburg [uni.lu]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Evers, Wiel H. [Auteur]
Delft University of Technology [TU Delft]
Allan, Guy [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Vanmaekelbergh, Daniel [Auteur]
Debye Institute for Nanomaterials Science
Delerue, Christophe [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Journal title :
Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Pages :
115431-1-9
Publisher :
American Physical Society
Publication date :
2013-09-15
ISSN :
1098-0121
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [en]
The electronic structure of recently synthesized square superlattices with atomic coherence composed of PbSe, CdSe, or CdTe nanocrystals (NCs) attached along {100} facets is investigated using tight-binding calculations. ...
Show more >The electronic structure of recently synthesized square superlattices with atomic coherence composed of PbSe, CdSe, or CdTe nanocrystals (NCs) attached along {100} facets is investigated using tight-binding calculations. In experimental realizations of these systems [W. H. Evers et al., Nano Lett. 13, 2317 (2013)], NC facets are atomically bonded, resulting in single-crystalline sheets, which, due to their nanogeometry, have an effective dimensionality below two. We predict electronic structures composed of successive bands formed by strong coupling between the wave functions of nearest-neighbor NCs. This coupling is mainly determined by the number of atoms at the NC bonding plane. The band structures deviate markedly from that of the corresponding two-dimensional (2D) quantum well; the 2D case can be recovered, however, if the effects of the nanogeometry are gradually reduced. The width of the bands can reach hundreds of meV, ascribing highly promising transport properties to square superlattices. The band edges are located at k=0 except for PbSe superlattices, where their position in k space surprisingly depends on the parity of the number of {100} atomic planes in the NCs. Our calculations demonstrate that semiconductors with dimensionality below two have a strong potential for (opto-)electronic, photovoltaic, and spintronic applications.Show less >
Show more >The electronic structure of recently synthesized square superlattices with atomic coherence composed of PbSe, CdSe, or CdTe nanocrystals (NCs) attached along {100} facets is investigated using tight-binding calculations. In experimental realizations of these systems [W. H. Evers et al., Nano Lett. 13, 2317 (2013)], NC facets are atomically bonded, resulting in single-crystalline sheets, which, due to their nanogeometry, have an effective dimensionality below two. We predict electronic structures composed of successive bands formed by strong coupling between the wave functions of nearest-neighbor NCs. This coupling is mainly determined by the number of atoms at the NC bonding plane. The band structures deviate markedly from that of the corresponding two-dimensional (2D) quantum well; the 2D case can be recovered, however, if the effects of the nanogeometry are gradually reduced. The width of the bands can reach hundreds of meV, ascribing highly promising transport properties to square superlattices. The band edges are located at k=0 except for PbSe superlattices, where their position in k space surprisingly depends on the parity of the number of {100} atomic planes in the NCs. Our calculations demonstrate that semiconductors with dimensionality below two have a strong potential for (opto-)electronic, photovoltaic, and spintronic applications.Show less >
Language :
Anglais
Popular science :
Non
ANR Project :
Source :
Files
- https://repository.tudelft.nl/islandora/object/uuid%3Ad7012374-36cf-451e-ae5f-b8bfe8d64565/datastream/OBJ/download
- Open access
- Access the document
- https://hal.archives-ouvertes.fr/hal-00871971/document
- Open access
- Access the document
- https://hal.archives-ouvertes.fr/hal-00871971/document
- Open access
- Access the document
- document
- Open access
- Access the document
- Kalesaki_2013_PhysRevB.88.115431.pdf
- Open access
- Access the document
- document
- Open access
- Access the document
- Kalesaki_2013_PhysRevB.88.115431.pdf
- Open access
- Access the document