AVS 46th International Symposium
    Surface Science Division Wednesday Sessions
       Session SS1+EM-WeA

Paper SS1+EM-WeA4
Chaotic-like Wavefunction Beating in Thin Silver Films with a Quasiperiodic Superstructure

Wednesday, October 27, 1999, 3:00 pm, Room 606

Session: Semiconductor Surface Science
Presenter: C.-S. Jiang, University of Texas, Austin
Authors: C.-S. Jiang, University of Texas, Austin
H. Yu, University of Texas, Austin
Ph. Ebert, Forschungszentrum J@um u@lich, Germany
X.-D. Wang, University of Texas, Austin
R. Diener, University of Texas, Austin
Q. Niu, University of Texas, Austin
C.K. Shih, University of Texas, Austin
Correspondent: Click to Email
It has been shown that atomically-flat Ag films can be grown on GaAs(110) substrates. These surfaces with (111) orientation exhibit, in addition, a one-dimensional quasi-periodic superstructure. Taking such surfaces as a model system, we investigated the effect of quasi-periodic scattering potential on the electronic structure by using spatially resolved scanning tunneling spectroscopy. Quantum well states due to the z-confinement of the 2-D thin film are clearly observed as a function of thickness. In addition, we have observed very intriguing chaotic interference patterns The observation of chaotic interference pattern is found to arise from the quasiperiodic superstructure acting as scattering potential for the 2-D electronic system. Theoretical calculations of the electronic states of quasi-periodic structure are currently underway.