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Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
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Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
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Topological spintronics and magnetoelectronics.

Qing Lin He1,2,3, Taylor L Hughes4, N Peter Armitage5

  • 1International Center for Quantum Materials, School of Physics, Peking University, Beijing, China. qlhe@pku.edu.cn.

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Summary
This summary is machine-generated.

Topological insulators offer unique electronic properties for advanced electronics. This perspective explores their use in spintronics and magnetoelectronics, highlighting key phenomena and applications.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Electronics

Background:

  • Topological electronic materials possess unique band structures.
  • These materials exhibit robust topological states with potential for revolutionary electronic applications.
  • Topological insulators are a key class of such materials.

Purpose of the Study:

  • To summarize recent developments in topological insulators.
  • To analyze their applications in spintronics and magnetoelectronics.
  • To highlight key phenomena and emerging device concepts.

Main Methods:

  • Review and synthesis of existing research on topological insulators.
  • Categorization of phenomena in spintronics and magnetoelectronics.
  • Analysis of experimental observations and theoretical predictions.

Main Results:

  • Topological insulators enable phenomena like spin-orbit torque and magnetic proximity effects.
  • Interplay between antiferromagnetism and topology is crucial.
  • Emerging applications include axion insulators and topological magnetoelectric effects.

Conclusions:

  • Topological insulators are promising for next-generation spintronic and magnetoelectronic devices.
  • Continued research into their unique properties will drive innovation.
  • These materials offer pathways to novel electronic functionalities.