Abstract
A spin-polarized state is examined under charge current at room temperature without magnetic fields in chiral disilicide crystals and . We found that a long-range spin transport occurs over ten micrometers in these inorganic crystals. A distribution of crystalline grains of different handedness is obtained via location-sensitive electrical transport measurements. The sum rule holds in the conversion coefficient in the current-voltage characteristics. A diamagnetic nature of the crystals supports that the spin polarization is not due to localized electron spins but due to itinerant electron spins. A large difference in the strength of antisymmetric spin-orbit interaction associated with electrons in Nb and ones in Ta is oppositely correlated with that of the spin polarization. A robust protection of the spin polarization occurs over long distances in chiral crystals.
- Received 9 June 2021
- Accepted 22 July 2021
DOI:https://doi.org/10.1103/PhysRevLett.127.126602
© 2021 American Physical Society
Physics Subject Headings (PhySH)
synopsis
Long-Range Spin Currents with Chiral Crystals
Published 14 September 2021
Chiral crystals can produce spin-polarized currents that propagate over tens of micrometers—a promising feature for application in spintronics devices.
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