Ta 5d band symmetry of 1T-TaS1.2Se0.8 in the commensurate charge-density-wave phase.
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.
Aiura
Y
Y
National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan. y.aiura@aist.go.jp
Hase
I
I
Bando
H
H
Yagi-Watanabe
K
K
Ozawa
K
K
Iwase
T
T
Nishihara
Y
Y
Shiino
O
O
Oshima
M
M
Kubota
M
M
Ono
K
K