Layer-by-layer-resolved quantum-well states in ultrathin silver islands on graphite: A photoemission study

1994 ◽  
Vol 50 (23) ◽  
pp. 17560-17563 ◽  
Author(s):  
F. Patthey ◽  
W.-D. Schneider
Keyword(s):  
Quantum Well ◽  
Layer By Layer ◽  
Photoemission Study ◽  
Quantum Well States ◽  
Silver Islands

COLLECTIVE ELECTRONIC EXCITATIONS IN SYSTEMS EXHIBITING QUANTUM WELL STATES

2009 ◽  
Vol 16 (02) ◽  
pp. 171-190 ◽  
Author(s):  
ANTONIO POLITANO ◽  
GENNARO CHIARELLO
Keyword(s):  
Thin Films ◽  
Quantum Well ◽  
Dispersion Curve ◽  
Layer By Layer ◽  
Electronic Excitations ◽  
Resolution Electron ◽  
Quantum Well States ◽  
Electron Energy Loss ◽  
Shed Light ◽  
Dynamical Screening

We present high-resolution electron energy loss spectroscopy (HREELS) measurements on surface plasmon (SP) dispersion in systems exhibiting quantum well states (QWS), i.e. Na / Cu (111), Ag / Cu (111), and Ag / Ni (111). Our results demonstrate that the dominant coefficient of SP dispersion for thin and layer-by-layer Ag films presenting QWS is quadratic even at small q||, in contrast with previous measurements on Ag semi-infinite media and Ag thin films deposited on Si (111). We suggest that this behavior is due to screening effects enhanced by the presence of QWS shifting the position of the centroid of the induced charge less inside the geometrical surface compared with Ag surfaces and Ag / Si (111). For ultrathin Ag films, i.e. two layers, the dispersion was found to be not positive, as theoretically predicted. Annealing of the Ag film caused an enhancement of the free-electron character of the QWS, thus inducing a negative linear term of the dispersion curve of the SP. Moreover, we report the first experimental evidence of chemical interface damping in thin films for K / Ag / Ni (111). As regards Na / Cu (111), we found a different dispersion curve compared with thick Na films, thus confirming the enhanced screening by Na QWS. Results reported here should shed light on the influence of QWS on dynamical screening phenomena in thin films.

Temperature-dependent angle-resolved photoemission study for quantum-well states in Ag nanofilms

1999 ◽  
Vol 60 (12) ◽  
pp. 8748-8752 ◽  
Author(s):  
Kazutoshi Takahashi ◽  
Akinori Tanaka ◽  
Hiroyuki Sasaki ◽  
Wakako Gondo ◽  
Shoji Suzuki ◽  
...  
Keyword(s):  
Quantum Well ◽  
Temperature Dependent ◽  
Photoemission Study ◽  
Quantum Well States

Photoemission Study of Quantum Well States in Thin ErAs Films on GaAs(100)

1998 ◽  
Vol 05 (01) ◽  
pp. 299-303 ◽  
Author(s):  
C. Wigren ◽  
L. Ilver ◽  
J. Kanski ◽  
P. O. Nilsson ◽  
U. O. Karlsson
Keyword(s):  
Quantum Well ◽  
Photoelectron Spectra ◽  
Electron Motion ◽  
Surface Layers ◽  
Effective Masses ◽  
Photoemission Study ◽  
Quantum Well States

Quantum well states in very thin epitaxial ErAs layers on GaAs(100) have been found in angle-resolved photoelectron spectra. From the dispersive properties of the quantum well states effective masses are obtained representing electron motion parallel to the surface layers and orthogonal to the layers.

Quantum Well States in Metallic Superlattices

1996 ◽  
Vol 6 (11) ◽  
pp. 1461-1467 ◽  
Author(s):  
C. Sommers ◽  
P. M. Levy
Keyword(s):  
Quantum Well ◽  
Quantum Well States

scholarly journals Erratum: Observation of monolayer valence band spin-orbit effect and induced quantum well states in MoX2

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Nasser Alidoust ◽  
Guang Bian ◽  
Su-Yang Xu ◽  
Raman Sankar ◽  
Madhab Neupane ◽  
...  
Keyword(s):  
Quantum Well ◽  
Valence Band ◽  
Spin Orbit ◽  
Quantum Well States

d-Band Quantum Well States

2000 ◽  
Vol 84 (15) ◽  
pp. 3410-3413 ◽  
Author(s):  
D.-A. Luh ◽  
J. J. Paggel ◽  
T. Miller ◽  
T.-C. Chiang
Keyword(s):  
Quantum Well ◽  
Quantum Well States
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