1. Chirality-Induced Spin Polarization over Macroscopic Distances in Chiral Disilicide Crystals
- Author
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Akito Inui, Kohei Shiota, Ryoga Amano, Yoshichika Ōnuki, Yuta Hosaka, Hiroshi Yamamoto, Hiroaki Shishido, Masato Hedo, Daichi Hirobe, Jun-ichiro Kishine, Jun-ichiro Ohe, Takao Nakama, and Yoshihiko Togawa
- Subjects
Materials science ,Spins ,Condensed matter physics ,Spin polarization ,General Physics and Astronomy ,Diamagnetism ,Condensed Matter::Strongly Correlated Electrons ,Electron ,Sum rule in quantum mechanics ,Spin (physics) ,Chirality (chemistry) ,Magnetic field - Abstract
A spin-polarized state is examined under charge current at room temperature without magnetic fields in chiral disilicide crystals NbSi_{2} and TaSi_{2}. 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 4d electrons in Nb and 5d 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.
- Published
- 2021