2025-07-02 東京理科大学,理化学研究所,東京大学大学院理学系研究科,浙江大学
図.外部磁場、外部回転下における荷電粒子（正電荷）の角運動量偏極。（a）弱磁場中では磁場と平行なスピン偏極が生じるが、（b） 強磁場中では軌道角運動量の寄与がスピンを上回り、磁場と反平行な偏極が生じる。
＜関連情報＞
- https://www.tus.ac.jp/today/archive/20250529_3574.html
- https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.135.011601
相対論的磁気渦巻き物質における卓越した軌道分極 Preponderant Orbital Polarization in Relativistic Magnetovortical Matter
Kenji Fukushima, Koichi Hattori, and Kazuya Mameda
Physical Review Letters Published: 1 July, 2025
DOI: https://doi.org/10.1103/PhysRevLett.135.011601
Abstract
We establish thermodynamic stability and gauge invariance in the magnetovortical matter of Dirac fermions under the coexistent rotation and strong magnetic field. The corresponding partition function reveals that the orbital contribution to bulk thermodynamics preponderates over the conventional contribution from anomaly-related spin effects. This orbital preponderance macroscopically manifests itself in the sign inversion of the induced charge and current in the magnetovortical matter, and can be tested experimentally as the flip of the angular momentum polarization of magnetovortical matter when the magnetic field strength is increased.
