Journal Article

FZJ-2019-01070

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Unconventional two-dimensional germanium dichalcogenides

Wang, J. ; Ronneberger, I. ; Zhou, L. ; Lu, L. ; Deringer, V. L. ; Zhang, B. ; Tian, L. ; Du, H.FZJ* ; Jia, C.FZJ* ; Qian, X. ; Wuttig, M.FZJ* ; Mazzarello, R. ; Zhang, W. (Corresponding author)

2018
RSC Publ. Cambridge

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Please use a persistent id in citations: doi:10.1039/C8NR01747F

Abstract: The recently discovered two-dimensional (2D) group IV chalcogenides attract much attention owing to their novel electronic and photonic properties. All the reported materials of this class favor (distorted) octahedral coordination via p bonding; by contrast, in the dichalcogenides where the bonding tendency approaches sp3, no corresponding 2D phase has been realized so far. Here, by engineering the composition of a chalcogenide heterostructure, the hitherto elusive GeTe2 is experimentally observed in a confined 2D environment. Density functional theory simulations predict the existence of a freestanding monolayer of octahedrally coordinated GeTe2 under tensile strain, and the existence of GeSe2 and GeS2 in the same form under equilibrium conditions. These 2D germanium dichalcogenides are either metallic or narrow gap semiconducting, and may lead to new applications in nanoscale electronics.

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Contributing Institute(s):

1. Physik Nanoskaliger Systeme (ER-C-1)
2. JARA - HPC (JARA-HPC)
3. JARA-FIT (JARA-FIT)

Research Program(s):

1. 143 - Controlling Configuration-Based Phenomena (POF3-143) (POF3-143)
2. Ab initio study of interfacial phase-change materials and thin chalcogenides (jara0150_20160501) (jara0150_20160501)

Appears in the scientific report 2018

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; National-Konsortium ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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