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Graphene on Ir(111): Physisorption with chemical modulation (CROSBI ID 171875)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Busse, Carsten ; Lazić, Predrag ; Djemour, Rabie ; Coraux, Johann ; Gerber, Timm ; Atodiresei, Nicolae ; Caciuc, Vasile ; Brako, Radovan ; N'Diaye, Alpha T. ; Blügel, Stefan et al. Graphene on Ir(111): Physisorption with chemical modulation // Physical review letters, 107 (2011), 3; 036101-1-036101-4. doi: 10.1103/PhysRevLett.107.036101

Podaci o odgovornosti

Busse, Carsten ; Lazić, Predrag ; Djemour, Rabie ; Coraux, Johann ; Gerber, Timm ; Atodiresei, Nicolae ; Caciuc, Vasile ; Brako, Radovan ; N'Diaye, Alpha T. ; Blügel, Stefan ; Zegenhagen, Jörg ; Michely, Thomas

engleski

Graphene on Ir(111): Physisorption with chemical modulation

The nonlocal van der Waals density functional (vdW-DF) approach is applied to calculate the binding of graphene to Ir(111). The precise agreement of the calculated mean height h = 3.41 Å ; of the C atoms with their mean height h = (3.38 ± 0.04) Å ; as measured by the X-ray standing wave (XSW) technique provides a benchmark for the applicability of the non-local functional. We find bonding of graphene to Ir(111) to be due to the van der Waals interaction with an antibonding average contribution from chemical interaction. Despite its globally repulsive character, in certain areas of the large graphene moiré unit cell charge accumulation between Ir substrate and graphene C atoms is observed, signaling a weak covalent bond formation.

graphene; Ir(111); physisorption; chemical modulation

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Podaci o izdanju

107 (3)

2011.

036101-1-036101-4

objavljeno

0031-9007

10.1103/PhysRevLett.107.036101

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Fizika

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