TY  - JOUR
AU  - Shukla, A.K.
AU  - Dahka, R. S.
AU  - Biswas, C.
AU  - Banik, S.
AU  - Barman, S. R.
AU  - Horn, K.
AU  - Ebert, Ph.
AU  - Urban, K.
TI  - Growth and electronic structure of alkali-metal adlayers on icosahedral Al70.5Pd21Mn8.5
JO  - Physical review / B
VL  - 73
IS  - 5
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-57670
SP  - 054432
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - We report x-ray photoelectron spectroscopy (XPS) study of Na and K adlayers on icosahedral Al70.5Pd21Mn8.5 (i-Al-Pd-Mn) quasicrystal. The Na 1s core-level exhibits a continuous linear shift of 0.8 eV towards lower binding energies (BE) with increasing coverage up to one monolayer (ML) saturation coverage. In the case of K/i-Al-Pd-Mn, a similar linear shift in the K 2p spectra towards lower BE is observed. In both cases, the plasmon related loss features are observed only above 1 ML. The substrate core-level peaks, such as Al 2p, do not exhibit any shift with the adlayer deposition up to the highest coverage. Based on these experimental observations and previous studies of alkali metal growth on metals, we conclude that below 1 ML, both Na and K form a dispersed phase on i-Al-Pd-Mn and there is hardly any charge transfer to the substrate. The variation of the adlayer and substrate core-level intensities with coverage indicates layer by layer growth.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000235668300073
DO  - DOI:10.1103/PhysRevB.73.054432
UR  - https://juser.fz-juelich.de/record/57670
ER  -