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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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.

Original languageEnglish
Article number155108
Pages (from-to)1551081-1551088
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number15
Publication statusPublished - 2003 Oct


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