Charge-density wave transition of 1T-VSe2 studied by angle-resolved photoemission spectroscopy

K. Terashima; T. Sato; H. Komatsu; T. Takahashi; N. Maeda; K. Hayashi

Charge-density wave transition of 1T-VSe₂ studied by angle-resolved photoemission spectroscopy

K. Terashima, T. Sato, H. Komatsu, T. Takahashi, N. Maeda, K. Hayashi

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Abstract

High-resolution angle-resolved photoemission spectroscopy (ARPES) has been performed on a layered transition-metal dichalcogenide (TMDC) 1T-VSe ₂ to study the (4×4) charge-density wave (CDW) mechanism. We observed a partial Fermi-surface (FS) nesting on the electronlike FS centered at the M (L) point. The spectral weight near E_F is considerably suppressed below the transition temperature (T_c=110 K) around the nested portion, while a negligible spectral change is observed even across T_c in other portions of FS. This suggests that the CDW transition in 1T-VSe₂ is caused by the three-dimensional FS nesting. Implications are discussed in relation to the physical properties of 1T-VSe₂ as well as the ARPES results of other TMDC's.

Original language	English
Article number	155108
Pages (from-to)	1551081-1551088
Number of pages	8
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	68
Issue number	15
Publication status	Published - 2003 Oct

Cite this

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abstract = "High-resolution angle-resolved photoemission spectroscopy (ARPES) has been performed on a layered transition-metal dichalcogenide (TMDC) 1T-VSe 2 to study the (4×4) charge-density wave (CDW) mechanism. We observed a partial Fermi-surface (FS) nesting on the electronlike FS centered at the M (L) point. The spectral weight near EF is considerably suppressed below the transition temperature (Tc=110 K) around the nested portion, while a negligible spectral change is observed even across Tc in other portions of FS. This suggests that the CDW transition in 1T-VSe2 is caused by the three-dimensional FS nesting. Implications are discussed in relation to the physical properties of 1T-VSe2 as well as the ARPES results of other TMDC's.",

author = "K. Terashima and T. Sato and H. Komatsu and T. Takahashi and N. Maeda and K. Hayashi",

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T1 - Charge-density wave transition of 1T-VSe2 studied by angle-resolved photoemission spectroscopy

AU - Terashima, K.

AU - Sato, T.

AU - Komatsu, H.

AU - Takahashi, T.

AU - Maeda, N.

AU - Hayashi, K.

PY - 2003/10

Y1 - 2003/10

N2 - High-resolution angle-resolved photoemission spectroscopy (ARPES) has been performed on a layered transition-metal dichalcogenide (TMDC) 1T-VSe 2 to study the (4×4) charge-density wave (CDW) mechanism. We observed a partial Fermi-surface (FS) nesting on the electronlike FS centered at the M (L) point. The spectral weight near EF is considerably suppressed below the transition temperature (Tc=110 K) around the nested portion, while a negligible spectral change is observed even across Tc in other portions of FS. This suggests that the CDW transition in 1T-VSe2 is caused by the three-dimensional FS nesting. Implications are discussed in relation to the physical properties of 1T-VSe2 as well as the ARPES results of other TMDC's.

AB - High-resolution angle-resolved photoemission spectroscopy (ARPES) has been performed on a layered transition-metal dichalcogenide (TMDC) 1T-VSe 2 to study the (4×4) charge-density wave (CDW) mechanism. We observed a partial Fermi-surface (FS) nesting on the electronlike FS centered at the M (L) point. The spectral weight near EF is considerably suppressed below the transition temperature (Tc=110 K) around the nested portion, while a negligible spectral change is observed even across Tc in other portions of FS. This suggests that the CDW transition in 1T-VSe2 is caused by the three-dimensional FS nesting. Implications are discussed in relation to the physical properties of 1T-VSe2 as well as the ARPES results of other TMDC's.

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Charge-density wave transition of 1T-VSe₂ studied by angle-resolved photoemission spectroscopy

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