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Comparing Electrical Magnetochiral Anisotropy and Chirality-Induced Spin Selectivity.

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Chirality and magnetism research reveals two key effects: electrical magnetochiral anisotropy (eMChA) and chirality-induced spin-selectivity (CISS). Despite differing properties, their similar magnitudes suggest a shared fundamental mechanism.

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Spintronics

Background:

  • The interplay of chirality and magnetism is a rapidly advancing research field.
  • Two primary phenomena, electrical magnetochiral anisotropy (eMChA) and chirality-induced spin-selectivity (CISS), have emerged.
  • These effects are studied by distinct research communities.

Purpose of the Study:

  • To compare and contrast the characteristics of eMChA and CISS.
  • To investigate the relationship between these two chiral magnetic phenomena.
  • To explore potential common underlying mechanisms.

Main Methods:

  • Comparative analysis of theoretical frameworks for eMChA and CISS.
  • Examination of magnetoresistance (MR) data from chiral devices.
  • Normalization of CISS MR and eMChA magnitudes to current density and spin polarization.

Main Results:

  • While CISS and eMChA exhibit different symmetry properties in device measurements, their normalized magnitudes are comparable.
  • Original CISS reports indicated a strong connection to eMChA.
  • The study highlights both distinctions and similarities between the two effects.

Conclusions:

  • The observed similarities in normalized magnitudes suggest a potential common physical origin for eMChA and CISS.
  • Further research is warranted to fully elucidate the relationship and shared mechanisms.
  • This work bridges two previously non-overlapping research areas in chiral magnetism.