Author/Authors :
Qikun Xue، نويسنده , , T. Sakurai and T. Hashizume ، نويسنده , , J.M. Zhou، نويسنده , , T. Sakata، نويسنده , , T. Sakurai، نويسنده ,
Abstract :
We studied the atomic structure of the GaAs(001) 4 × 2 and 4 × 6 phases by scanning tunneling microscopy (STM) and determined that both the 4 × 2c(8 × 2) and 4 × 6 phases are Ga-terminated. The 4 × 2c(8 × 2) structure can be described better by Biegelsen et al.ʹs bilayer Ga dimer model than by Skalaʹs As model.
