研究目的
Investigating the surface structural and electronic properties of TaTe2 at room temperature to understand the charge density wave phase transition at low temperature.
研究成果
The surface of TaTe2 maintains the double zigzag trimer chains, same as the bulk, with the structure originating from the trimer bonding states of the Ta dxz and dxy orbitals. This provides new insights into the charge density wave phase transition at low temperature.
研究不足
The study is limited to room temperature conditions and does not directly address the low-temperature phase transition mechanisms.
1：Experimental Design and Method Selection:
The surface structure was investigated using both low energy electron diffraction intensity versus voltage (LEED I-V) and density functional theory (DFT) calculations.
2：Sample Selection and Data Sources:
Single crystals of TaTe2 were grown by the chemical vapor transport technique.
3：List of Experimental Equipment and Materials:
A four-grid LEED optics (OCI BDL800IR) with electron beam energy range from 30 to 450 eV was used.
4：Experimental Procedures and Operational Workflow:
TaTe2 samples were cleaved at 300 K in an ultra-high vacuum environment, and the LEED images were immediately taken.
5：Data Analysis Methods:
The structural refinements were performed using a modified version of the symmetrized automated tensor LEED package (SATLEED).
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