Spectroscopic Signatures on Increase in Charge-Density-Wave Potential of 1 T-TaS₁.₂Se₀.₈
Aiura, Y. · Hase, I. · Bando, H. · Yagi-Watanabe, K. · Tanaka, K. · Ozawa, K. · Iwase, T. · Nishihara, Y. · Shiino, O. · Oshima, M. · Kubota, M. · Ono, K.
Original · EN
We present an angle-resolved photoemission (ARPES) study on the layered transition-metal dichalcogenide 1 T-TaS₁.₂Se₀.₈ in the metallic commensurate charge-density-wave (CDW) phase. A model calculation of the spectral function captures the main features of the ARPES spectra well qualitatively, that is, the gross splits of unreconstructed band structure in the absence of the CDW superlattice. The observed enhancement of the size of the gap between the lower and middle fragments of the Ta 5d band along the ΓM line by cooling is interpreted in terms of the increase in the CDW-related potential.
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