Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 124, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2136158
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We investigate the effects of constraining the motion of atoms in finite slabs used to simulate the rutile TiO2 (110) surface in first-principles calculations. We show that an appropriate choice of fixing atoms in a slab eliminates spurious effects due to the finite size of the slabs, leading to a considerable improvement in the simulation of the (110) surface. The method thus allows for a systematic improvement in convergence in calculating both geometrical and electronic properties. The advantages of this approach are illustrated by presenting the first theoretical results on the displacement of the surface atoms in agreement with experiment. (c) 2006 American Institute of Physics.
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