Chirality-Induced Spin Polarization over Macroscopic Distances in Chiral Disilicide Crystals
Chirality-Induced Spin Polarization over Macroscopic Distances in Chiral Disilicide Crystals
复制标题
手性二硅化物晶体中宏观距离的手性诱导自旋极化
DOI：
10.1103/physrevlett.127.126602
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发表时间：
2021
影响因子：
8.6
通讯作者：
Togawa Yoshihiko
中科院分区：
文献类型：
--
作者：
Shiota Kohei;Inui Akito;Hosaka Yuta;Amano Ryoga;Onuki Yoshichika;Hedo Masato;Nakama Takao;Hirobe Daichi;Ohe Jun-ichiro;Kishine Jun-ichiro;Yamamoto Hiroshi M.;Shishido Hiroaki;Togawa Yoshihiko
研究了手性二硅酸盐晶体在室温无磁场条件下的电荷电流作用下的自旋极化态。我们发现，在这些无机晶体中，在10微米以上发生了远程自旋输运。通过位置敏感的电输运测量获得了不同手性的晶体颗粒的分布。求和规则适用于电流-电压特性的转换系数。晶体的抗磁性支持自旋极化不是由于局部电子自旋，而是由于巡回电子自旋。Nb中电子与Ta中电子的反对称自旋轨道相互作用强度的差异与自旋极化强度的差异成反比。在手性晶体中，自旋极化发生了长距离的强大保护。
A spin-polarized state is examined under charge current at room temperature without magnetic fields in chiral disilicide crystalsand. 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 withelectrons in Nb andones 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.