Electronic structure of η-Mo4O11 studied by high-resolution angle-resolved photoemission spectroscopy

T. Sato; T. Dobashi; H. Komatsu; T. Takahashi; M. Koyano

doi:10.1016/j.elspec.2005.01.286

Electronic structure of η-Mo₄O₁₁ studied by high-resolution angle-resolved photoemission spectroscopy

T. Sato, T. Dobashi, H. Komatsu, T. Takahashi, M. Koyano

Research output: Contribution to journal › Article

7 Citations (Scopus)

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
Pages (from-to)	549-552
Number of pages	4
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	144-147
DOIs	https://doi.org/10.1016/j.elspec.2005.01.286
Publication status	Published - 2005 Jun 1

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

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title = "Electronic structure of η-Mo4O11 studied by high-resolution angle-resolved photoemission spectroscopy",

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{"}.",

keywords = "Charge density wave, Fermi surface, Photoemission",

author = "T. Sato and T. Dobashi and H. Komatsu and T. Takahashi and M. Koyano",

year = "2005",

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T1 - Electronic structure of η-Mo4O11 studied by high-resolution angle-resolved photoemission spectroscopy

AU - Sato, T.

AU - Dobashi, T.

AU - Komatsu, H.

AU - Takahashi, T.

AU - Koyano, M.

PY - 2005/6/1

Y1 - 2005/6/1

N2 - 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".

AB - 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".

KW - Charge density wave

KW - Fermi surface

KW - Photoemission

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