Three-dimensional Fermi-surface nesting in 1T-VSe2 studied by angle-resolved photoemission spectroscopy

Takafumi Sato, Kensei Terashima, Seigo Souma, Hiroaki Matsui, Takashi Takahashi, Hongbo Yang, Shancai Wang, Hong Ding, Nobuhiro Maeda, Koya Hayashi

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17 Citations (Scopus)


We have performed high-resolution angle-resolved photoemission Spectroscopy (ARPES) with synchrotron radiation on layered transition-metal dichalcogenide 1T-VSe2 to study the mechanism of the three-dimensional charge-density-wave (CDW) transition. We found that the Fermi surface around the M(L) and K(H) points shows considerable wiggling along the wave vector normal to the layer (kz) despite the apparently two-dimensional crystal structure. ARPES spectra below the CDW transition temperature show a signature of pseudogap opening at a specific kz-region on the Fermi surface, demonstrating that the CDW transition of 1T-VSe2 is driven by three-dimensional Fermi-surface nesting.

Original languageEnglish
Pages (from-to)3331-3334
Number of pages4
JournalJournal of the Physical Society of Japan
Issue number12
Publication statusPublished - 2004 Dec


  • 1T-VSe
  • Charge-density wave
  • Fermi surface
  • Photoemission


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