Direct evidence of hidden local spin polarization in a centrosymmetric superconductor LaO0.55 F0.45BiS2

Shi-Long Wu, Kazuki Sumida, Koji Miyamoto, Kazuaki Taguchi, Tomoki Yoshikawa, Akio Kimura, Yoshifumi Ueda, Masashi Arita, Masanori Nagao, Satoshi Watauchi, Isao Tanaka and Taichi Okuda ()
Additional contact information
Shi-Long Wu: Hiroshima University
Kazuki Sumida: Hiroshima University
Koji Miyamoto: Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University
Kazuaki Taguchi: Hiroshima University
Tomoki Yoshikawa: Hiroshima University
Akio Kimura: Hiroshima University
Yoshifumi Ueda: Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University
Masashi Arita: Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University
Masanori Nagao: Center for Crystal Science and Technology (CCST), University of Yamanashi
Satoshi Watauchi: Center for Crystal Science and Technology (CCST), University of Yamanashi
Isao Tanaka: Center for Crystal Science and Technology (CCST), University of Yamanashi
Taichi Okuda: Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: Abstract Conventional Rashba spin polarization is caused by the combination of strong spin–orbit interaction and spatial inversion asymmetry. However, Rashba–Dresselhaus-type spin-split states are predicted in the centrosymmetric LaOBiS2 system by recent theory, which stem from the local inversion asymmetry of active BiS2 layer. By performing high-resolution spin- and angle-resolved photoemission spectroscopy, we have investigated the electronic band structure and spin texture of superconductor LaO0.55F0.45BiS2. Here we present direct spectroscopic evidence for the local spin polarization of both the valence band and the conduction band. In particular, the coexistence of Rashba-like and Dresselhaus-like spin textures has been observed in the conduction band. The finding is of key importance for fabrication of proposed dual-gated spin-field effect transistor. Moreover, the spin-split band leads to a spin–momentum locking Fermi surface from which superconductivity emerges. Our demonstration not only expands the scope of spintronic materials but also enhances the understanding of spin–orbit interaction-related superconductivity.

Date: 2017
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-017-02058-2 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-02058-2

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-017-02058-2

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().