Understanding the insulating nature of alkali-metal/Si(111):B interfaces - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2013

Understanding the insulating nature of alkali-metal/Si(111):B interfaces

Yannick Fagot-Révurat
Cédric Tournier-Colletta
  • Fonction : Auteur
  • PersonId : 776934
  • IdRef : 159358493
Laurent Chaput
  • Fonction : Auteur
  • PersonId : 757410
  • IdRef : 111073693
Antonio Tejeda
Bertrand Kierren
Luis Cardenas
Daniel Malterre
Patrick Le Fèvre
François Bertran
Amina Taleb-Ibrahimi

Résumé

We have recently revisited the phase diagram of alkali-metal/Si(111):B semiconducting interfaces previously suggested as the possible realization of a Mott-Hubbard insulator on a triangular lattice. The insulating character of the 2 root 3 x 2 root 3R30 surface reconstruction observed at the saturation coverage, i.e. 0.5 ML, has been shown to find its origin in a giant alkali-metal-induced vertical distortion. Low energy electron diffraction, photoemission spectroscopy and scanning tunneling microscopy and spectroscopy experiments coupled with linear augmented plane-wave density functional theory calculations allow a full understanding of the k-resolved band structure, explaining both the inhomogeneous charge transfers into an Si-B hybridized surface state and the opening of a band gap larger than 1 eV. Moreover, root 3 x root 3R30, 3 x 3 and 2 root 3 x 2 root 3R30 surface reconstructions observed as a function of coverage may reveal a filling-controlled transition from a half-filled correlated magnetic material to a strongly distorted band insulator at saturation.
Fichier non déposé

Dates et versions

hal-01273656 , version 1 (12-02-2016)

Identifiants

Citer

Yannick Fagot-Révurat, Cédric Tournier-Colletta, Laurent Chaput, Antonio Tejeda, Bertrand Kierren, et al.. Understanding the insulating nature of alkali-metal/Si(111):B interfaces. Journal of Physics: Condensed Matter, 2013, 25 (9), pp.094004. ⟨10.1088/0953-8984/25/9/094004⟩. ⟨hal-01273656⟩
71 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More