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arXiv · 1602.05284

Deviation from Fermi-liquid behavior in two-dimensional surface states of Au-induced nanowires on Ge(001) by correlation and localization

K. Yaji·R. Yukawa·S. Kim·Y. Ohtsubo·P. Le Fèvre·F. Bertran·A. Taleb-Ibrahimi·I. Matsuda·K. Nakatsuji·F. Komori
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Abstract

The electronic states of Au-induced atomic nanowires on Ge(001) (Au/Ge(001) NWs) have been investigated by angle-resolved photoelectron spectroscopy with linearly polarized light. We have found three electron pockets around $\bar{J}\bar{K}$, where the Fermi surfaces are closed in a surface Brillouin zone, indicating that the surface states of Au/Ge(001) NWs are two-dimensional whereas the atomic structure is one-dimensional. The two-dimensional metallic states exhibit remarkable suppression of the photoelectron intensity near a Fermi energy. This suppression can be explained by the correlation and localization effects in disordered metals, which is a deviation from a Fermi-liquid model.

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K. Yaji, R. Yukawa, S. Kim, Y. Ohtsubo, P. Le Fèvre, F. Bertran, A. Taleb-Ibrahimi, I. Matsuda, K. Nakatsuji, F. Komori. 2016-02-17. Deviation from Fermi-liquid behavior in two-dimensional surface states of Au-induced nanowires on Ge(001) by correlation and localization. https://arxiv.org/abs/1602.05284

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