研究目的
Investigating the temperature-dependent magneto-absorption and magnetotransport spectroscopy of HgTe/CdHgTe quantum wells to observe the topological phase transition and the appearance of single-valley Dirac fermions.
研究成果
The study clearly observed a topological phase transition between quantum spin Hall and trivial insulator states in HgTe/CdHgTe quantum wells, revealing the appearance of single-valley Dirac fermions at specific temperatures. The findings provide insights into the behavior of Dirac fermions under varying temperature and magnetic field conditions, with implications for future research in topological insulators and quantum materials.
研究不足
The study is limited by the temperature range (1.7 to 150 K) and magnetic field strength (up to 16 T) used in the experiments. The role of bulk inversion asymmetry (BIA) and interface inversion asymmetry (IIA) was found to be smaller than previously assumed, indicating potential areas for further investigation.
