第33回表面科学学術講演会特集号 [II]
フェルミガス的に振る舞う表面一次元金属電子
キーワード:
one-dimensional electron,
Fermi gas,
semiconductor surface,
angle-resolved photoelectron spectroscopy
2014 年 35 巻 8 号 p. 426-431
詳細
2014 年 35 巻 8 号 p. 426-431
The electronic band structure of Pt-induced nanowires on Ge(001) (Pt/Ge(001) NWs) has been studied with angle-resolved photoelectron spectroscopy. We have found two metallic bands with s-polarized light. One of the bands shows the straight Fermi lines, indicating that it is an ideal one-dimensional metallic state. On the other hand, a density of state of the band at Fermi level is not suppressed and the spectral shape agrees with a Fermi-Dirac-type distribution function even at 6 K, well below the temperature of the structural phase transition of Pt/Ge(001) NWs. We therefore conclude that the electron in the one-dimensional metallic band behaves not as a Luttinger liquid but as a one-dimensional Fermi gas.
