Ta 5d band symmetry of 1T-TaS1.2Se0.8 in the commensurate charge-density-wave phase |
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Authors: | Aiura Y Hase I Bando H Yagi-Watanabe K Ozawa K Iwase T Nishihara Y Shiino O Oshima M Kubota M Ono K |
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Institution: | National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan. y.aiura@aist.go.jp |
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Abstract: | We present a detailed angle-resolved photoemission study on the layered transition-metal dichalcogenide 1T-TaS1.2Se0.8 in the commensurate charge-density-wave (CDW) phase. A drastic reduction in the spectral weight along the high symmetry line GammaM, particularly around the point M, is observed when s-polarized light was used. This implies that the initial state must be symmetric with respect to a mirror plane perpendicular to the line GammaK, which is consistent with conventional band calculations in the absence of the CDW. We conclude that there is only a limited amount of modification of the electronic structure of 1T-TaS1.2Se0.8 in the commensurate CDW phase due to the CDW-related potential. |
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