Temperature-dependence of the chirality-induced spin selectivity effect-Experiments and theory

Area of Science:

• Condensed matter physics
• Spintronics
• Surface science

Background:

• The chirality-induced spin selectivity (CISS) effect is crucial for spintronics.
• Understanding its temperature dependence helps differentiate theoretical models.
• Previous studies have explored various mechanisms, but a consensus remains elusive.

Purpose of the Study:

• To analyze the temperature-dependence of the CISS effect.
• To evaluate different theoretical models, particularly the spinterface mechanism.
• To re-interpret experimental data from Qian et al. (2022) regarding temperature effects on CISS.

Main Methods:

• Review of existing experimental results on CISS temperature dependence.
• Theoretical analysis of temperature effects within different CISS models.
• Detailed examination of experimental data from Qian et al. (2022).

Main Results:

• The CISS effect exhibits a distinct temperature dependence.
• Experimental data from Qian et al. indicate an increase in CISS effect with decreasing temperature.
• The spinterface mechanism is shown to be consistent with these findings.

Conclusions:

• The temperature dependence of CISS provides a critical test for theoretical models.
• Contrary to initial interpretations, experimental data suggest CISS enhances at lower temperatures.
• The spinterface model successfully explains the observed temperature-dependent behavior of the CISS effect.