Comparing Electrical Magnetochiral Anisotropy and Chirality-Induced Spin Selectivity

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.