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Temperature activated chiral induced spin selectivity.

J Fransson1

  • 1Department of Physics and Astronomy, Uppsala University, P.O. Box 516, 75120 Uppsala, Sweden.

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|August 28, 2023
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Summary
This summary is machine-generated.

Temperature significantly enhances chiral induced spin selectivity in chiral molecules containing transition metal or rare earth elements. This effect, linked to nuclear motion, creates a temperature-dependent magnetic environment, boosting spin selectivity at higher temperatures.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Chemistry

Background:

  • Chiral molecules with transition metal or rare earth elements exhibit chiral induced spin selectivity (CICC).
  • Spin selectivity is typically suppressed at low temperatures in these systems.

Purpose of the Study:

  • To investigate the temperature dependence of chiral induced spin selectivity.
  • To elucidate the underlying mechanism for the observed temperature reinforcement.

Main Methods:

  • Experimental studies on chiral molecules containing transition metal or rare earth elements.
  • Analysis relating temperature to nuclear motion and spin interactions.

Main Results:

  • Spin selectivity is suppressed at low temperatures but increases significantly with rising temperature.
  • Nuclear motion, influenced by temperature, modulates local spin moments.
  • An anisotropic magnetic environment is generated and enhanced by temperature.

Conclusions:

  • Temperature plays a crucial role in reinforcing chiral induced spin selectivity.
  • Nuclear displacements and indirect exchange interactions are key to the temperature-dependent spin selectivity.
  • The induced local anisotropy field is the origin of enhanced spin selectivity at elevated temperatures.