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Published on: June 28, 2018
Intrinsic spin-Hall effect: topological transitions in two-dimensional systems.
1Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Prospekt Nauki 45, 03028, Kiev, Ukraine.
Physical Review Letters
|February 1, 2008
Summary
Topological transitions, marked by Berry phase changes, are detected via the spin-Hall effect in 2D systems. The spin-orbit field
Area of Science:
- Condensed matter physics
- Materials science
Background:
- Topological transitions involve discontinuous changes in Berry phase.
- These phenomena are crucial for understanding quantum states in materials.
Purpose of the Study:
- To investigate topological transitions in two-dimensional electron and hole systems.
- To explore the role of spin-orbit interaction in these transitions.
Main Methods:
- Investigating the spin-Hall effect.
- Varying carrier density and structural asymmetry.
- Analyzing the spin-orbit field's topological properties.
Main Results:
- Topological transitions were detected through the spin-Hall effect.
- Discontinuous behavior and universality features of spin-Hall conductivity were observed.
- These features are directly linked to the topological properties of the spin-orbit field.
Conclusions:
- The spin-Hall effect serves as a robust indicator of topological transitions.
- Spin-orbit interaction significantly influences the nature of these transitions.
- Understanding the spin-orbit field's topology is key to predicting material properties.
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