Related Experiment Video
Updated: Jul 13, 2025
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.1K
Manipulating Topological Phases in Magnetic Topological Insulators.
Gang Qiu1,2, Hung-Yu Yang1, Su Kong Chong1,3
1Department of Electrical and Computer Engineering, University of California, Los Angeles, CA 90095, USA.
Nanomaterials (Basel, Switzerland)
|October 14, 2023
Summary
Magnetic topological insulators (MTIs) combine topology and magnetism for advanced applications. Researchers are exploring ways to control MTI properties for spintronics and quantum computing breakthroughs.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Magnetic topological insulators (MTIs) possess unique topological band structures coupled with magnetism.
- This combination enables novel phenomena like the quantum anomalous Hall effect (QAHE).
- MTIs hold promise for next-generation spintronics and quantum computing technologies.
Purpose of the Study:
- To review material platforms enabling the quantum anomalous Hall effect in MTIs.
- To highlight recent advancements in manipulating topological properties of MTIs.
- To discuss the interplay between topology and magnetism in MTI research.
Main Methods:
- Review of existing literature on MTI material platforms.
- Focus on modulation techniques including finite-size effects, pressure, electric fields, and magnetic proximity effects.
- Analysis of exotic topological phases in MTIs.
Main Results:
- Identification of mainstream MTI platforms for achieving QAHE.
- Demonstration of controllability over topological phases via material parameters and external conditions.
- Exploration of topological phase manipulation in finite-size MTIs.
Conclusions:
- The manipulation of topological phases in MTIs is crucial for advancing fundamental research and practical applications.
- Continued investigation into the interplay of topology and magnetism in MTIs will drive innovation.
- MTIs offer a promising avenue for breakthroughs in topological physics and device applications.
Related Concept Videos
01:28Types Of Superconductors
1.0K
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
1.0K
01:31Ferromagnetism
2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
02:31Phase Transitions
19.1K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
19.1K
02:39Phase Transitions: Melting and Freezing
12.4K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
12.4K
01:19Phase Diagram
5.9K
The phase of a given substance depends on the pressure and temperature. Thus, plots of pressure versus temperature showing the phase in each region provide considerable insights into the thermal properties of substances. Such plots are known as phase diagrams. For instance, in the phase diagram for water (Figure 1), the solid curve boundaries between the phases indicate phase transitions (i.e., temperatures and pressures at which the phases coexist).
5.9K
02:39Phase Diagrams
41.2K
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
41.2K