Abstract
We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) on a quasi-two-dimensional (2D) conductor η-Mo4O 11, which undergoes a two-stage charge density wave (CDW) transition at 109 and 35 K. We have succeeded in experimentally mapping out the two-dimensional Fermi surface (FS) as well as directly observing two different CDW gaps. We found that the two-dimensional FS of η-Mo4O 11 consists of two "hidden one-dimensional (1D) FSs" originating in two almost independent conducting paths in the crystal. We also found that the gap energy and the temperature dependence are different for the two CDW gaps. The present ARPES results indicate that the characteristic CDW transition in η-Mo4O11 is driven by the instability of two "hidden 1D FSs".
Original language | English |
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Pages (from-to) | 549-552 |
Number of pages | 4 |
Journal | Journal of Electron Spectroscopy and Related Phenomena |
Volume | 144-147 |
DOIs | |
Publication status | Published - 2005 Jun |
Keywords
- Charge density wave
- Fermi surface
- Photoemission
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Radiation
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Spectroscopy
- Physical and Theoretical Chemistry