What does "Higher-order Topological Phases" mean?
Table of Contents
Higher-order topological phases are special states of matter that can exist in certain materials. They have unique properties that are different from regular topological phases.
Key Features
These phases can produce special modes at the corners of a shape or structure, which is unusual compared to standard phases. There can be two types of these higher-order phases:
- The first type generates corner modes related to specific energies.
- The second type has corner modes that are hidden and appear under certain conditions.
Importance of Symmetry
The behavior of these phases is greatly influenced by symmetry rules in the material. For instance, certain combinations of rotation and time can create or change these phases.
Applications
Higher-order topological phases may have practical uses in new technologies. They can be studied in various systems, such as layered structures. These materials can show interesting effects when their properties are tuned, leading to new discoveries in physics and potential applications in engineering.