TITLE

Bilayer oscillation of subband effective masses in Pb/Ge(111) thin-film quantum wells

AUTHOR(S)
Tang, S.-J.; Chang-Yeh Lee; Chien-Chung Huang; Tay-Rong Chang; Cheng-Maw Cheng; Ku-Ding Tsuei; Jeng, H.-T.
PUB. DATE
March 2010
SOURCE
Applied Physics Letters;3/8/2010, Vol. 96 Issue 10, p103106
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Subband dispersions of quantum-well states in Pb thin films on Ge(111) have been measured with angle-resolved photoemission spectroscopy. The effective masses at the surface zone center exhibit a bilayer oscillation with thickness, in both magnitude and sign. This behavior is attributed to a strong interaction between Pb quantum-well subbands and the Ge valence maximum near the Fermi level, which occurs about every two monolayers.
ACCESSION #
48591065

 

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