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Article Dans Une Revue Applied Physics Letters Année : 2006

Finite-size effects in BaTi03 nanowires

E. Bousquet
  • Fonction : Auteur
J. Junquera
  • Fonction : Auteur
Ghosez Ph.
  • Fonction : Auteur

Résumé

The size dependence of the ferroelectric properties of BaTiO3 nanowires is studied from first principles. We show that the ferroelectric distortion along the wire axis disappears below a critical diameter of about 1.2nm. This disappearance is related to a global contraction of the unit cell resulting from low atomic coordinations at the wire surface. It is shown that a ferroelectric distortion can be recovered under appropriate tensile strain conditions.

Dates et versions

hal-00143078 , version 1 (24-04-2007)

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G. Geneste, E. Bousquet, J. Junquera, Ghosez Ph.. Finite-size effects in BaTi03 nanowires. Applied Physics Letters, 2006, 88 (11), pp.112906. ⟨10.1063/1.2186104⟩. ⟨hal-00143078⟩
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