This title appears in the Scientific Report :
2001
Please use the identifier:
http://hdl.handle.net/2128/1052 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.64.235410 in citations.
Scanning tunneling spectroscopy of quantum well and surface states of thin Ag films grown on GaAs (110)
Scanning tunneling spectroscopy of quantum well and surface states of thin Ag films grown on GaAs (110)
We investigate the electronic states of thin Ag films grown on GaAs(110) surfaces at low temperatures by scanning tunneling spectroscopy with single-layer thickness resolution. We identify the quantum-well states arising from the z confinement of the two-dimensional Ag films, and find an unoccupied...
Saved in:
Personal Name(s): | Jiang, C.-S. |
---|---|
Yu, H.-B. / Wang, X.-D. / Shih, C. K. / Ebert, P. | |
Contributing Institute: |
Mikrostrukturforschung; IFF-IMF |
Published in: | Physical Review B Physical review / B, 64 64 (2001 2001) 23 23, S. 235410 235410 |
Imprint: |
College Park, Md.
APS
2001
|
Physical Description: |
1-5 |
DOI: |
10.1103/PhysRevB.64.235410 |
Document Type: |
Journal Article |
Research Program: |
Festkörperforschung für die Informationstechnik |
Series Title: |
Physical Review B
64 |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.64.235410 in citations.
We investigate the electronic states of thin Ag films grown on GaAs(110) surfaces at low temperatures by scanning tunneling spectroscopy with single-layer thickness resolution. We identify the quantum-well states arising from the z confinement of the two-dimensional Ag films, and find an unoccupied Shockley-type surface state 180 +/- 30 mev above the Fermi energy. The s-p electronic band dispersion along the Gamma -L direction is found to be shifted upward by 190 +/- 20 meV compared to pure ag(111) surfaces. This shift, and the fact that the Shockley-type surface state is unoccupied and thus also shifted upward compared to pure Ag(111) surfaces are connected to the lattice strain of the quasiperiodically modulated Ag film. Implications of the results for other Ag thin films are discussed. |