Rashba-like spin splitting along three momentum directions in trigonal layered PtBi2

Ya Feng; Qi Jiang; Baojie Feng; Meng Yang; Tao Xu; Wenjing Liu; Xiufu Yang; Masashi Arita; Eike F. Schwier; Kenya Shimada; Harald O. Jeschke; Ronny Thomale; Youguo Shi; Xianxin Wu; Shaozhu Xiao; Shan Qiao; Shaolong He

doi:10.1038/s41467-019-12805-2

Rashba-like spin splitting along three momentum directions in trigonal layered PtBi₂

Ya Feng, Qi Jiang, Baojie Feng, Meng Yang, Tao Xu, Wenjing Liu, Xiufu Yang, Masashi Arita, Eike F. Schwier, Kenya Shimada, Harald O. Jeschke, Ronny Thomale, Youguo Shi, Xianxin Wu, Shaozhu Xiao, Shan Qiao, Shaolong He

Research Institute for Interdisciplinary Science

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Spin-orbit coupling (SOC) has gained much attention for its rich physical phenomena and highly promising applications in spintronic devices. The Rashba-type SOC in systems with inversion symmetry breaking is particularly attractive for spintronics applications since it allows for flexible manipulation of spin current by external electric fields. Here, we report the discovery of a giant anisotropic Rashba-like spin splitting along three momentum directions (3D Rashba-like spin splitting) with a helical spin polarization around the M points in the Brillouin zone of trigonal layered PtBi₂. Due to its inversion asymmetry and reduced symmetry at the M point, Rashba-type as well as Dresselhaus-type SOC cooperatively yield a 3D spin splitting with α_R ≈ 4.36 eV Å in PtBi₂. The experimental realization of 3D Rashba-like spin splitting not only has fundamental interests but also paves the way to the future exploration of a new class of material with unprecedented functionalities for spintronics applications.

Original language	English
Article number	4765
Journal	Nature communications
Volume	10
Issue number	1
DOIs	https://doi.org/10.1038/s41467-019-12805-2
Publication status	Published - Dec 1 2019

ASJC Scopus subject areas

Chemistry(all)
Biochemistry, Genetics and Molecular Biology(all)
Physics and Astronomy(all)

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Feng, Y., Jiang, Q., Feng, B., Yang, M., Xu, T., Liu, W., Yang, X., Arita, M., Schwier, E. F., Shimada, K., Jeschke, H. O., Thomale, R., Shi, Y., Wu, X., Xiao, S., Qiao, S., & He, S. (2019). Rashba-like spin splitting along three momentum directions in trigonal layered PtBi₂ Nature communications, 10(1), [4765]. https://doi.org/10.1038/s41467-019-12805-2

Rashba-like spin splitting along three momentum directions in trigonal layered PtBi₂ . / Feng, Ya; Jiang, Qi; Feng, Baojie; Yang, Meng; Xu, Tao; Liu, Wenjing; Yang, Xiufu; Arita, Masashi; Schwier, Eike F.; Shimada, Kenya; Jeschke, Harald O.; Thomale, Ronny; Shi, Youguo; Wu, Xianxin; Xiao, Shaozhu; Qiao, Shan; He, Shaolong.

In: Nature communications, Vol. 10, No. 1, 4765, 01.12.2019.

Research output: Contribution to journal › Article › peer-review

Feng, Ya ; Jiang, Qi ; Feng, Baojie ; Yang, Meng ; Xu, Tao ; Liu, Wenjing ; Yang, Xiufu ; Arita, Masashi ; Schwier, Eike F. ; Shimada, Kenya ; Jeschke, Harald O. ; Thomale, Ronny ; Shi, Youguo ; Wu, Xianxin ; Xiao, Shaozhu ; Qiao, Shan ; He, Shaolong. / Rashba-like spin splitting along three momentum directions in trigonal layered PtBi₂ In: Nature communications. 2019 ; Vol. 10, No. 1.

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title = "Rashba-like spin splitting along three momentum directions in trigonal layered PtBi2 ",

abstract = "Spin-orbit coupling (SOC) has gained much attention for its rich physical phenomena and highly promising applications in spintronic devices. The Rashba-type SOC in systems with inversion symmetry breaking is particularly attractive for spintronics applications since it allows for flexible manipulation of spin current by external electric fields. Here, we report the discovery of a giant anisotropic Rashba-like spin splitting along three momentum directions (3D Rashba-like spin splitting) with a helical spin polarization around the M points in the Brillouin zone of trigonal layered PtBi2. Due to its inversion asymmetry and reduced symmetry at the M point, Rashba-type as well as Dresselhaus-type SOC cooperatively yield a 3D spin splitting with αR ≈ 4.36 eV {\AA} in PtBi2. The experimental realization of 3D Rashba-like spin splitting not only has fundamental interests but also paves the way to the future exploration of a new class of material with unprecedented functionalities for spintronics applications.",

author = "Ya Feng and Qi Jiang and Baojie Feng and Meng Yang and Tao Xu and Wenjing Liu and Xiufu Yang and Masashi Arita and Schwier, {Eike F.} and Kenya Shimada and Jeschke, {Harald O.} and Ronny Thomale and Youguo Shi and Xianxin Wu and Shaozhu Xiao and Shan Qiao and Shaolong He",

note = "Funding Information: The authors would like to thank Darren Peets and Hongxin Yang for helpful discussion. This work is supported by the National Key Research and Development Program of China (Nos. 2017YFA0303600, 2016YFA0300600, and 2017YFA0302901), the National Natural Science Foundation of China (Grant Nos. 11674367,11227902,11927807, U1632266, and 11774399), the Natural Science Foundation of Zhejiang, China (LZ18A040002), the Ningbo Science and Technology Bureau (Grant No. 2018B10060), the German Science Foundation through DFG-SFB 1170 “TOCOTRONICS” (project B04). We acknowledge further financial support from the DFG through the W{\"u}rzburg–Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter—ct.qmat (EXC 2147, project-id 39085490). S.L.H. would like also to acknowledge the Ningbo 3315 program. We thank the Hiroshima Synchrotron Radiation Center for providing beamtime (project nos. 18AU013, 18AU017, and 18AG018).",

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T1 - Rashba-like spin splitting along three momentum directions in trigonal layered PtBi2

AU - Feng, Ya

AU - Jiang, Qi

AU - Feng, Baojie

AU - Yang, Meng

AU - Xu, Tao

AU - Liu, Wenjing

AU - Yang, Xiufu

AU - Arita, Masashi

AU - Schwier, Eike F.

AU - Shimada, Kenya

AU - Jeschke, Harald O.

AU - Thomale, Ronny

AU - Shi, Youguo

AU - Wu, Xianxin

AU - Xiao, Shaozhu

AU - Qiao, Shan

AU - He, Shaolong

N1 - Funding Information: The authors would like to thank Darren Peets and Hongxin Yang for helpful discussion. This work is supported by the National Key Research and Development Program of China (Nos. 2017YFA0303600, 2016YFA0300600, and 2017YFA0302901), the National Natural Science Foundation of China (Grant Nos. 11674367,11227902,11927807, U1632266, and 11774399), the Natural Science Foundation of Zhejiang, China (LZ18A040002), the Ningbo Science and Technology Bureau (Grant No. 2018B10060), the German Science Foundation through DFG-SFB 1170 “TOCOTRONICS” (project B04). We acknowledge further financial support from the DFG through the Würzburg–Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter—ct.qmat (EXC 2147, project-id 39085490). S.L.H. would like also to acknowledge the Ningbo 3315 program. We thank the Hiroshima Synchrotron Radiation Center for providing beamtime (project nos. 18AU013, 18AU017, and 18AG018).

PY - 2019/12/1

Y1 - 2019/12/1

N2 - Spin-orbit coupling (SOC) has gained much attention for its rich physical phenomena and highly promising applications in spintronic devices. The Rashba-type SOC in systems with inversion symmetry breaking is particularly attractive for spintronics applications since it allows for flexible manipulation of spin current by external electric fields. Here, we report the discovery of a giant anisotropic Rashba-like spin splitting along three momentum directions (3D Rashba-like spin splitting) with a helical spin polarization around the M points in the Brillouin zone of trigonal layered PtBi2. Due to its inversion asymmetry and reduced symmetry at the M point, Rashba-type as well as Dresselhaus-type SOC cooperatively yield a 3D spin splitting with αR ≈ 4.36 eV Å in PtBi2. The experimental realization of 3D Rashba-like spin splitting not only has fundamental interests but also paves the way to the future exploration of a new class of material with unprecedented functionalities for spintronics applications.

AB - Spin-orbit coupling (SOC) has gained much attention for its rich physical phenomena and highly promising applications in spintronic devices. The Rashba-type SOC in systems with inversion symmetry breaking is particularly attractive for spintronics applications since it allows for flexible manipulation of spin current by external electric fields. Here, we report the discovery of a giant anisotropic Rashba-like spin splitting along three momentum directions (3D Rashba-like spin splitting) with a helical spin polarization around the M points in the Brillouin zone of trigonal layered PtBi2. Due to its inversion asymmetry and reduced symmetry at the M point, Rashba-type as well as Dresselhaus-type SOC cooperatively yield a 3D spin splitting with αR ≈ 4.36 eV Å in PtBi2. The experimental realization of 3D Rashba-like spin splitting not only has fundamental interests but also paves the way to the future exploration of a new class of material with unprecedented functionalities for spintronics applications.

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