Domain Dependent Fermi Arcs Observed in a Striped Phase Dichalcogenide

Takashi Mizokawa*, Alexei Barinov, Viktor Kandyba, Alessio Giampietri, Ryoya Matsumoto, Yohei Okamoto, Kou Takubo, Koji Miyamoto, Taichi Okuda, Sunseng Pyon, Hiroyuki Ishii, Kazutaka Kudo, Minoru Nohara, Naurang L. Saini*


研究成果: Article査読


Solids undergoing symmetry breaking phase transitions commonly exhibit domains of low symmetry phases with various sizes and morphological shapes. Usually, the shapes of these domains are not directly related to the nature of symmetry breaking. Here, an interesting example of a layered dichalcogenide with a triangular lattice is shown, in which symmetry breaking of electronic charge/orbital is accompanied by formation of striped domains and exotic surface states with peculiar spin textures. Using angle-resolved photoemission spectromicroscopy, the mesoscopic striped domains in the layered IrTe2 are observed across the first order phase transition at ≈280 K. Under further cooling down to 47 K, the striped domains evolve into trijunction domains with electronic anisotropy in three directions. Each domain harbors quasi 1D surface bands forming fragmented Fermi surfaces (Fermi arcs) with peculiar spin polarization revealed by spin-resolved photoemission spectroscopy. The Fermi arc corresponds to an edge state of the 2D bulk electronic bands truncated at the surface, indicating an interesting interplay between the symmetry breaking, surface electronic structure, and the spin state.

ジャーナルAdvanced Quantum Technologies
出版ステータスAccepted/In press - 2022

ASJC Scopus subject areas

  • 統計物理学および非線形物理学
  • 電子材料、光学材料、および磁性材料
  • 核物理学および高エネルギー物理学
  • 数理物理学
  • 凝縮系物理学
  • 計算理論と計算数学
  • 電子工学および電気工学


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