2013
DOI: 10.1103/physrevb.88.115431
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Electronic structure of atomically coherent square semiconductor superlattices with dimensionality below two

Abstract: 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], 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 successiv… Show more

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Cited by 73 publications
(105 citation statements)
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“…[15,16] Since NCs with different growth modes normally show different physical and chemical properties, detailed investigations on NCs growth processes may help better understand the phase transformation and the underlying growth mechanisms. [18] Oriented attachment mainly consists of the following three steps: (1) adjacent particles spontaneously self-organize so that they share a common crystallographic orientation; (2) the particles fuse to create a planar coherent interface; (3) the primary particles are perfectly aligned during growth, [14,19] as implied by the diffraction of a single crystal structure. [18] Oriented attachment mainly consists of the following three steps: (1) adjacent particles spontaneously self-organize so that they share a common crystallographic orientation; (2) the particles fuse to create a planar coherent interface; (3) the primary particles are perfectly aligned during growth, [14,19] as implied by the diffraction of a single crystal structure.…”
Section: Doi: 101002/advs201802202mentioning
confidence: 99%
“…[15,16] Since NCs with different growth modes normally show different physical and chemical properties, detailed investigations on NCs growth processes may help better understand the phase transformation and the underlying growth mechanisms. [18] Oriented attachment mainly consists of the following three steps: (1) adjacent particles spontaneously self-organize so that they share a common crystallographic orientation; (2) the particles fuse to create a planar coherent interface; (3) the primary particles are perfectly aligned during growth, [14,19] as implied by the diffraction of a single crystal structure. [18] Oriented attachment mainly consists of the following three steps: (1) adjacent particles spontaneously self-organize so that they share a common crystallographic orientation; (2) the particles fuse to create a planar coherent interface; (3) the primary particles are perfectly aligned during growth, [14,19] as implied by the diffraction of a single crystal structure.…”
Section: Doi: 101002/advs201802202mentioning
confidence: 99%
“…According to Kalesaki et al, the bandwidth of 1S e minibands in 2D cubic PbSe QD superlattices with initial QDs of 6 nm in diameter increases approximately linearly from ∼80 to ∼120 meV as the number of atoms in the neck increases from ∼60 to ∼110. 41 The neck widths we observe correspond to between ∼49 and ∼85 atoms in the neck. We do indeed observe significant broadening of the first exciton peak in the absorption spectrum for treatments that induce necking.…”
mentioning
confidence: 91%
“…The opposite case t e,h 2α∆ e,h , when electrons and holes are delocalized in the NC array was studied in Refs. [40][41][42] .…”
mentioning
confidence: 99%