Absence of nesting in the charge-density-wave system 1 T-VS2 as seen by photoelectron spectroscopy

M. Mulazzi, Ashish Atma Chainani, N. Katayama, R. Eguchi, M. Matsunami, H. Ohashi, Y. Senba, M. Nohara, M. Uchida, H. Takagi, S. Shin

研究成果: Article

58 引文 (Scopus)

摘要

We report on the electronic structure and Fermi surfaces of the transition-metal dichalcogenide 1 T-VS2 in the low-temperature charge-density-wave (CDW) ordered phase. Using soft x-ray angle-resolved photoemission spectroscopy (ARPES), we investigate the in-plane and out-of-plane vanadium- and sulfur-derived band dispersions and identify kz dispersions in this layered system. Core-level photoemission and x-ray absorption spectroscopy show that vanadium electrons are in the d1 configuration while 2p-3d resonant ARPES shows only 3d -derived dispersive bands near the Fermi level. Comparison of energy- and angle-dependent data with band-structure calculations reveals renormalization of the 3d bands, but no lower Hubbard band, a signature of the rather weak electron-electron correlations in VS2. High-resolution temperature-dependent low-energy ARPES measurements show the opening of an energy gap at the Fermi level that is attributed to the condensation of the CDW phase. The results indicate a CDW transition in the absence of nesting for 1 T-VS2

原文English
文章編號075130
期刊Physical Review B - Condensed Matter and Materials Physics
82
發行號7
DOIs
出版狀態Published - 2010 八月 18

指紋

Charge density waves
Photoelectron spectroscopy
Vanadium
photoelectron spectroscopy
Fermi level
Dispersions
photoelectric emission
X rays
Electron correlations
Core levels
Fermi surface
Electrons
vanadium
Photoemission
Absorption spectroscopy
Sulfur
Band structure
Electronic structure
Transition metals
Condensation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

引用此文

Mulazzi, M. ; Chainani, Ashish Atma ; Katayama, N. ; Eguchi, R. ; Matsunami, M. ; Ohashi, H. ; Senba, Y. ; Nohara, M. ; Uchida, M. ; Takagi, H. ; Shin, S. / Absence of nesting in the charge-density-wave system 1 T-VS2 as seen by photoelectron spectroscopy. 於: Physical Review B - Condensed Matter and Materials Physics. 2010 ; 卷 82, 編號 7.
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abstract = "We report on the electronic structure and Fermi surfaces of the transition-metal dichalcogenide 1 T-VS2 in the low-temperature charge-density-wave (CDW) ordered phase. Using soft x-ray angle-resolved photoemission spectroscopy (ARPES), we investigate the in-plane and out-of-plane vanadium- and sulfur-derived band dispersions and identify kz dispersions in this layered system. Core-level photoemission and x-ray absorption spectroscopy show that vanadium electrons are in the d1 configuration while 2p-3d resonant ARPES shows only 3d -derived dispersive bands near the Fermi level. Comparison of energy- and angle-dependent data with band-structure calculations reveals renormalization of the 3d bands, but no lower Hubbard band, a signature of the rather weak electron-electron correlations in VS2. High-resolution temperature-dependent low-energy ARPES measurements show the opening of an energy gap at the Fermi level that is attributed to the condensation of the CDW phase. The results indicate a CDW transition in the absence of nesting for 1 T-VS2",
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Mulazzi, M, Chainani, AA, Katayama, N, Eguchi, R, Matsunami, M, Ohashi, H, Senba, Y, Nohara, M, Uchida, M, Takagi, H & Shin, S 2010, 'Absence of nesting in the charge-density-wave system 1 T-VS2 as seen by photoelectron spectroscopy', Physical Review B - Condensed Matter and Materials Physics, 卷 82, 編號 7, 075130. https://doi.org/10.1103/PhysRevB.82.075130

Absence of nesting in the charge-density-wave system 1 T-VS2 as seen by photoelectron spectroscopy. / Mulazzi, M.; Chainani, Ashish Atma; Katayama, N.; Eguchi, R.; Matsunami, M.; Ohashi, H.; Senba, Y.; Nohara, M.; Uchida, M.; Takagi, H.; Shin, S.

於: Physical Review B - Condensed Matter and Materials Physics, 卷 82, 編號 7, 075130, 18.08.2010.

研究成果: Article

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AU - Mulazzi, M.

AU - Chainani, Ashish Atma

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AU - Eguchi, R.

AU - Matsunami, M.

AU - Ohashi, H.

AU - Senba, Y.

AU - Nohara, M.

AU - Uchida, M.

AU - Takagi, H.

AU - Shin, S.

PY - 2010/8/18

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N2 - We report on the electronic structure and Fermi surfaces of the transition-metal dichalcogenide 1 T-VS2 in the low-temperature charge-density-wave (CDW) ordered phase. Using soft x-ray angle-resolved photoemission spectroscopy (ARPES), we investigate the in-plane and out-of-plane vanadium- and sulfur-derived band dispersions and identify kz dispersions in this layered system. Core-level photoemission and x-ray absorption spectroscopy show that vanadium electrons are in the d1 configuration while 2p-3d resonant ARPES shows only 3d -derived dispersive bands near the Fermi level. Comparison of energy- and angle-dependent data with band-structure calculations reveals renormalization of the 3d bands, but no lower Hubbard band, a signature of the rather weak electron-electron correlations in VS2. High-resolution temperature-dependent low-energy ARPES measurements show the opening of an energy gap at the Fermi level that is attributed to the condensation of the CDW phase. The results indicate a CDW transition in the absence of nesting for 1 T-VS2

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