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Determining Membrane Protein Topology Using Fluorescence Protease Protection FPP
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Topological magnon amplification.

Daniel Malz1, Johannes Knolle2, Andreas Nunnenkamp3

  • 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, D-85748, Garching, Germany. daniel.malz@mpq.mpg.de.

Nature Communications
|September 4, 2019
PubMed
Summary
This summary is machine-generated.

This study proposes driving topological magnon insulators with electromagnetic fields to create edge currents. This method reveals topological magnon edge modes and enables applications in magnon spintronics.

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Area of Science:

  • Condensed matter physics
  • Spintronics
  • Quantum magnetism

Background:

  • Topology is crucial for understanding electronic systems.
  • Topological band structures exist in bosonic systems, but are hard to detect in materials.
  • Excited states, like thermal Hall response, are used to identify topological properties.

Purpose of the Study:

  • To propose a method for driving topological magnon insulators.
  • To investigate the resulting edge mode instabilities and currents.
  • To identify experimental signatures of topological magnon edge modes.

Main Methods:

  • Driving a topological magnon insulator with an electromagnetic field.
  • Analyzing edge mode instabilities and non-equilibrium steady-state magnon edge currents.
  • Proposing experimental signatures for topological magnon edge modes.

Main Results:

  • Driving topological magnon insulators with electromagnetic fields induces edge mode instabilities.
  • A large non-equilibrium steady-state magnon edge current is generated.
  • Experimental signatures for topological magnon edge modes are discussed.

Conclusions:

  • This work provides a method to drive topological magnon insulators and detect their edge modes.
  • The proposed mechanism can lead to topological travelling-wave magnon amplifiers and lasers.
  • This research advances the development of functional topological magnetic materials for spintronics.