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Spontaneous Spin Textures in Multiorbital Mott Systems.

J Kuneš1, D Geffroy2

  • 1Institute of Physics, The Czech Academy of Sciences, Na Slovance 2, 182 21 Praha 8, Czech Republic.

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|July 9, 2016
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Summary

We discovered a new mechanism for creating spin textures in materials by breaking symmetry with electronic correlations. Doping a spin-triplet excitonic insulator generates novel thermodynamic phases for spintronics applications.

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Spintronics

Background:

  • Spin textures in k-space are crucial for spintronics, originating from spin-orbit coupling in noncentrosymmetric crystals.
  • Understanding the mechanisms behind k-space spin texture formation is key to developing advanced spintronic devices.

Purpose of the Study:

  • To present a novel mechanism for generating k-space spin textures.
  • To explore the creation of new thermodynamic phases through electronic correlations and symmetry breaking.
  • To investigate the potential of doped spin-triplet excitonic insulators for spintronics.

Main Methods:

  • Dynamical mean-field theory (DMFT) was employed for numerical simulations.
  • Analytic calculations using a generalized double-exchange framework were used for interpretation.

Main Results:

  • A mechanism for k-space spin texture appearance driven by spontaneous symmetry breaking due to electronic correlations was demonstrated.
  • Doping a spin-triplet excitonic insulator was shown to create new thermodynamic phases.
  • The study provides a pathway to engineer unique spin textures for technological applications.

Conclusions:

  • Electronic correlations can drive symmetry breaking to create k-space spin textures.
  • Doped spin-triplet excitonic insulators offer a route to novel quantum phases.
  • This work advances the understanding of spin texture formation and its spintronic potential.