Work

2D graphitic-like gallium nitride and structural selectivity in confinement at graphene/SiC interface

Year: 2022

Type: preprint

Abstract: Predictive first-principles calculations suggest graphitic-like GaN to be theoretically possible. Thus far, it has not been experimentally reported. We report on GaN monolayer in a buckled geometry obtained in confinement at graphene/SiC interface by metalorganic chemical vapor deposition (MOCVD). Conductive atomic force microscopy (C-AFM) has been employed to probe vertical current injection through the graphene/SiC interface and to establish the uniformity of the intercalated areas. Scanning transmission electron microscopy (S/TEM) has been employed for atomic resolution imaging and spectroscopy. Discontinuity in the anticipated stacking sequence of graphitic-like GaN monolayers has been exposed and reasoned as a case of simultaneous formation of Ga-N and Ga-O bonds. The formation of Ga-O bonds acquires importance in instigating chemical-species-specific structural selectivity in confinement at atom-size scale.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2206.10247

Authors: Sfuncia, Gianfranco, Nicotra, Giuseppe, Giannazzo, Filippo, Pécz, Béla, Gueorguiev, Gueorgui Kostov, Kakanakova-Georgieva, Anelia

Institutions: National Research Council, Institute for Microelectronics and Microsystems, Institute for Technical Physics and Materials Science, HUN-REN Centre for Energy Research, Linköping University

Language: English

Topic: GaN-based semiconductor devices and materials

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: European Commission, Ministero dell’Istruzione, dell’Università e della Ricerca, Vetenskapsrådet

Awards: G2163403906, G4335375066, G4383660527, G5422889133, Enabling Science and Technology through European Electron Microscopy, G5483924367, G6326200580, G692825579, G7199227476, G7204191092, Emerging 2D semiconductors deposited with group III nitrides, G8007699706

OpenAlex ID: W4283329162

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