研究目的
Investigating the large spin-orbit splitting in inversion layers on HgCdTe with an inverted band structure for potential spintronic device applications.
研究成果
The study successfully demonstrates large spin-orbit splitting in inversion layers on inverted HgCdTe materials, with extracted zero-field spin splitting energies up to ～ 34 meV. This finding suggests the potential for developing HgTe-based spintronic devices operable at room temperature.
研究不足
The study is limited by the weak quantum plateaus and Shubnikov-de Haas oscillations observed, possibly due to parallel conduction from the bulk. The exact contribution from the bulk is not quantitatively determined due to unknown Hall mobility.
1：Experimental Design and Method Selection:
The study involves the preparation of p-type inverted Hg1?xCdxTe samples by the Bridgman method and the creation of inversion layers via anodic oxidation. Magneto-transport measurements were performed in the van der Pauw geometry at 1.5 K under perpendicular magnetic fields.
2：5 K under perpendicular magnetic fields.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Two samples with different Cd contents (x = 0.10 and x = 0.09) were used. The samples were cut into 5 × 5 mm2 squares, and Ohmic contacts were made using indium.
3：10 and x = 09) were used. The samples were cut into 5 × 5 mm2 squares, and Ohmic contacts were made using indium.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The study utilized the Bridgman method for sample growth, anodic oxidation for inversion layer creation, and a van der Pauw setup for magneto-transport measurements.
4：Experimental Procedures and Operational Workflow:
After sample preparation, magneto-transport measurements were conducted to observe Shubnikov-de Haas oscillations and analyze the beating patterns for zero-field spin splitting energy.
5：Data Analysis Methods:
Fast Fourier transformation was used to analyze the beating patterns in the Shubnikov-de Haas oscillations to extract the zero-field spin splitting energy.
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