Improved description of soft layered materials with van der Waals density functional theory
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作者:
Graziano, Gabriella
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UCL, London Ctr Nanotechnol, Thomas Young Ctr, London WC1E 6BT, England
UCL, Dept Chem, London WC1E 6BT, England
Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, EnglandUCL, London Ctr Nanotechnol, Thomas Young Ctr, London WC1E 6BT, England
Graziano, Gabriella
[1
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Klimes, Jiri
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UCL, London Ctr Nanotechnol, Thomas Young Ctr, London WC1E 6BT, England
UCL, Dept Chem, London WC1E 6BT, EnglandUCL, London Ctr Nanotechnol, Thomas Young Ctr, London WC1E 6BT, England
Klimes, Jiri
[1
,2
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Fernandez-Alonso, Felix
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Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England
UCL, Dept Phys & Astron, London WC1E 6BT, EnglandUCL, London Ctr Nanotechnol, Thomas Young Ctr, London WC1E 6BT, England
Fernandez-Alonso, Felix
[3
,4
]
Michaelides, Angelos
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UCL, London Ctr Nanotechnol, Thomas Young Ctr, London WC1E 6BT, England
UCL, Dept Chem, London WC1E 6BT, EnglandUCL, London Ctr Nanotechnol, Thomas Young Ctr, London WC1E 6BT, England
Michaelides, Angelos
[1
,2
]
机构:
[1] UCL, London Ctr Nanotechnol, Thomas Young Ctr, London WC1E 6BT, England
The accurate description of van der Waals forces within density functional theory is currently one of the most active areas of research in computational physics and chemistry. Here we report results on the structural and energetic properties of graphite and hexagonal boron nitride, two layered materials where interlayer binding is dominated by van der Waals forces. Results from several density functionals are reported, including the optimized Becke88 van der Waals (optB88-vdW) and the optimized PBE van der Waals (optPBE-vdW) (Klimes et al 2010 J. Phys.: Condens. Matter 22 022201) functionals. Where comparison to experiment and higher-level theory is possible, the results obtained from the two new van der Waals density functionals are in good agreement. An analysis of the physical nature of the interlayer binding in both graphite and hexagonal boron nitride is also reported.