Band structure and Fermi surface of atomically uniform lead films

He Shaolong

Zeng Zhenhua

Arita Masashi

Sawada Masahiro

Shimada Kenya

Qiao Shan

Li Guoling

Li Wei-Xue

Zhang Yan-Feng

Zhang Yi

Ma Xucun

Jia Jinfeng

Xue Qi-Kun

Namatame Hirofumi

Taniguchi Masaki

New Journal of Physics

Atomically uniform lead films are prepared on Si(111)-(7 x 7) substrates by the molecular beam epitaxy method, and their electronic structures are investigated by high-resolution angle-resolved photoemission spectroscopy and first-principles density functional theory calculations. We have observed the six-fold symmetric Fermi surfaces of Pb/Si(111)-(7 x 7) films. Their topology and size are almost the same regardless of the difference of film thicknesses (17, 21, 24 and 25 monolayers). The comparison between the measured and calculated thin-film Fermi surfaces suggests that the as-prepared Pb/Si(111)-(7 x 7) films are dominated by the hexagonal-close-packed stacking films instead of the face-centered-cubic ones. The theoretical calculations also indicate that spin-orbit coupling plays an important role in the band structures and Fermi surface topologies of Pb films.

Physics [ 420 ]

eng

IOP Publishing Ltd

(c) IOP Publishing Ltd and Deutsche Physikalische Gesellschaft

[ISSN] 1367-2630

[DOI] 10.1088/1367-2630/12/11/113034

[DOI] http://dx.doi.org/10.1088/1367-2630/12/11/113034