Dichroic optical and electrical properties of rhenium dichalcogenides layer compounds

Ho, Ching‐Hwa; Hsieh, Ming-Kai; Wu, Chi‐Jui; Huang, Y. S.; Tiong, K. K.

doi:10.1016/j.jallcom.2006.08.359

Cited by 11 publications

(14 citation statements)

References 11 publications

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“…2(d), which exhibits band contours that are closed along the -K 3 direction but open along the orthogonal -M 2 direction. This directly underpins the strong anisotropy of in-plane transport of this compound [8].…”

Section: Resultsmentioning

confidence: 66%

“…This opens the exciting prospect to achieve optoelectronic functionality from bulk ReX 2 of a form that can only be realized by complex fabrication of single-layer samples and devices in group VI semiconducting TMDCs. Coupled with a pronounced anisotropy in their measured optical and electrical properties [7][8][9][10], ReX 2 materials are therefore important compounds for expanding the functionality of the TMDC class, and they have potential for next-generation technologies [11,12]. The electronic structure underpinning their striking optoelectronic properties, however, remains almost completely unexplored experimentally to date.…”

Section: Introductionmentioning

confidence: 99%

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Narrow-band anisotropic electronic structure of ReS2

et al. 2017

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We have used angle-resolved photoemission spectroscopy to investigate the band structure of ReS 2 , a transitionmetal dichalcogenide semiconductor with a distorted 1T crystal structure. We find a large number of narrow valence bands, which we attribute to the combined influence of structural distortion and spin-orbit coupling. We further show how this leads to a strong in-plane anisotropy of the electronic structure, with quasi-one-dimensional bands reflecting predominant hopping along zigzag Re chains. We find that this does not persist up to the top of the valence band, where a more three-dimensional character is recovered with the fundamental band gap located away from the Brillouin zone center along k z . These experiments are in good agreement with our density-functional theory calculations, shedding light on the bulk electronic structure of ReS 2 , and how it can be expected to evolve when thinned to a single layer.

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Section: Resultsmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Narrow-band anisotropic electronic structure of ReS2

et al. 2017

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“…2(b) for comparison of the bulk and two-dimensional Brillouin zones of ReSe 2 (the latter is a projection of the former along the reciprocal space c * axis). These special directions correspond to, for example, the polarization directions of the two band-edge excitons in ReSe 2 [44][45][46] and were identified as the directions of maximum and minimum dispersion in the studies of bulk material [25,47]. We present the measured valence-band dispersions for the monolayer (1L) flake shown in Fig.…”

Section: B Arpes Results From Atomically Thin Resementioning

confidence: 99%

Interplay of crystal thickness and in-plane anisotropy and evolution of quasi-one-dimensional electronic character inReSe2

et al. 2021

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We study the valence band structure of ReSe 2 crystals with varying thickness down to a single layer using nanoscale angle-resolved photoemission spectroscopy and density functional theory. The width of the top valence band in the direction perpendicular to the rhenium chains decreases with decreasing number of layers, from ∼200 meV for the bulk to ∼80 meV for monolayer. This demonstrates increase of in-plane anisotropy induced by changes in the interlayer coupling and suggests progressively more one-dimensional character of electronic states in few-layer rhenium dichalcogenides.

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“…2(a) for the indication of these directions in the real and reciprocal spaces and (b) for comparison of the bulk and two-dimensional Brillouin zones of ReSe 2 (the latter is a projection of the former along the reciprocal space c * axis). These special directions correspond to, for example, the polarization directions of the two band edge excitons in ReSe 2 [41][42][43] and were identified as the directions of maximum and minimum dispersion in the studies of bulk material [23,44]. We present the measured valence band dispersions for the monolayer (1L) flake shown in Fig.…”

Section: B Arpes Results From Atomically Thin Rese2mentioning

confidence: 98%

Interplay of crystal thickness and in-plane anisotropy and evolution of quasi-one dimensional electronic character in ReSe$_{2}$

Hart,

Gunasekera,

Webb

et al. 2020

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We study the valence band structure of ReSe2 crystals with varying thickness down to a single layer using nanoscale angle-resolved photoemission spectroscopy and density functional theory. The width of the top valence band in the direction perpendicular to the rhenium chains decreases with decreasing number of layers, from 280 meV for the bulk to 61 meV for monolayer. This demonstrates increase of in-plane anisotropy induced by changes in the interlayer coupling and suggests progressively more one-dimensional character of electronic states in few-layer rhenium dichalcogenides.

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Dichroic optical and electrical properties of rhenium dichalcogenides layer compounds

Cited by 11 publications

References 11 publications

Narrow-band anisotropic electronic structure of ReS2

Narrow-band anisotropic electronic structure of ReS2

Interplay of crystal thickness and in-plane anisotropy and evolution of quasi-one-dimensional electronic character inReSe2

Interplay of crystal thickness and in-plane anisotropy and evolution of quasi-one dimensional electronic character in ReSe$_{2}$

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