%0 Journal Article %1 PhysRevLett.127.126402 %A Zhang, Ke %A Zhao, Shixuan %A Hao, Zhanyang %A Kumar, Shiv %A Schwier, Eike. F. %A Zhang, Yingjie %A Sun, Hongyi %A Wang, Yuan %A Hao, Yujie %A Ma, Xiaoming %A Liu, Cai %A Wang, Le %A Wang, Xiaoxiao %A Miyamoto, Koji %A Okuda, Taichi %A Liu, Chang %A Mei, Jiawei %A Shimada, Kenya %A Chen, Chaoyu %A Liu, Qihang %D 2021 %I American Physical Society %J Phys. Rev. Lett. %K a %N 12 %P 126402 %R 10.1103/PhysRevLett.127.126402 %T Observation of spin-momentum-layer locking in a centrosymmetric crystal %U https://link.aps.org/doi/10.1103/PhysRevLett.127.126402 %V 127 %X The spin polarization in nonmagnetic materials is conventionally attributed to the outcome of spin-orbit coupling when the global inversion symmetry is broken. The recently discovered hidden spin polarization indicates that a specific atomic site asymmetry could also induce measurable spin polarization, leading to a paradigm shift in research on centrosymmetric crystals for potential spintronic applications. Here, combining spin- and angle-resolved photoemission spectroscopy and theoretical calculations, we report distinct spin-momentum-layer locking phenomena in a centrosymmetric, layered material, BiOI. The measured spin is highly polarized along the Brillouin zone boundary, while the same effect almost vanishes around the zone center due to its nonsymmorphic crystal structure. Our work demonstrates the existence of momentum-dependent hidden spin polarization and uncovers the microscopic mechanism of spin, momentum, and layer locking to each other, thus shedding light on the design metrics for future spintronic materials.

@article{PhysRevLett.127.126402, abstract = {The spin polarization in nonmagnetic materials is conventionally attributed to the outcome of spin-orbit coupling when the global inversion symmetry is broken. The recently discovered hidden spin polarization indicates that a specific atomic site asymmetry could also induce measurable spin polarization, leading to a paradigm shift in research on centrosymmetric crystals for potential spintronic applications. Here, combining spin- and angle-resolved photoemission spectroscopy and theoretical calculations, we report distinct spin-momentum-layer locking phenomena in a centrosymmetric, layered material, BiOI. The measured spin is highly polarized along the Brillouin zone boundary, while the same effect almost vanishes around the zone center due to its nonsymmorphic crystal structure. Our work demonstrates the existence of momentum-dependent hidden spin polarization and uncovers the microscopic mechanism of spin, momentum, and layer locking to each other, thus shedding light on the design metrics for future spintronic materials.}, added-at = {2023-11-16T17:50:54.000+0100}, author = {Zhang, Ke and Zhao, Shixuan and Hao, Zhanyang and Kumar, Shiv and Schwier, Eike. F. and Zhang, Yingjie and Sun, Hongyi and Wang, Yuan and Hao, Yujie and Ma, Xiaoming and Liu, Cai and Wang, Le and Wang, Xiaoxiao and Miyamoto, Koji and Okuda, Taichi and Liu, Chang and Mei, Jiawei and Shimada, Kenya and Chen, Chaoyu and Liu, Qihang}, biburl = {https://www.bibsonomy.org/bibtex/260a5970472ec0947fdeeb5a1a923c4a4/ctqmat}, day = 14, doi = {10.1103/PhysRevLett.127.126402}, interhash = {d2e46ae7e3ecc00a7b2dce81ee52c321}, intrahash = {60a5970472ec0947fdeeb5a1a923c4a4}, journal = {Phys. Rev. Lett.}, keywords = {a}, month = {09}, number = 12, numpages = {7}, pages = 126402, publisher = {American Physical Society}, timestamp = {2023-11-16T17:50:54.000+0100}, title = {Observation of spin-momentum-layer locking in a centrosymmetric crystal}, url = {https://link.aps.org/doi/10.1103/PhysRevLett.127.126402}, volume = 127, year = 2021 }