Spin-orbit coupling and odd-parity superconductivity in the quasi-one-dimensional compound Li0.9Mo6O17

Platt, Christian, Cho, Weejee, McKenzie, Ross H., Thomale, Ronny and Raghu, S. (2016) Spin-orbit coupling and odd-parity superconductivity in the quasi-one-dimensional compound Li0.9Mo6O17. Physical Review B, 93 21: . doi:10.1103/PhysRevB.93.214515

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Author Platt, Christian
Cho, Weejee
McKenzie, Ross H.
Thomale, Ronny
Raghu, S.
Title Spin-orbit coupling and odd-parity superconductivity in the quasi-one-dimensional compound Li0.9Mo6O17
Formatted title
Spin-orbit coupling and odd-parity superconductivity in the quasi-one-dimensional compound Li0.9Mo6O17
Journal name Physical Review B   Check publisher's open access policy
ISSN 2469-9950
2469-9969
Publication date 2016-06-23
Year available 2016
Sub-type Article (original research)
DOI 10.1103/PhysRevB.93.214515
Open Access Status File (Publisher version)
Volume 93
Issue 21
Total pages 6
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2017
Language eng
Formatted abstract
Previous theoretical studies [W. Cho, C. Platt, R. H. McKenzie, and S. Raghu, Phys. Rev. B 92, 134514 (2015); N. Lera and J. V. Alvarez, ibid. 92, 174523 (2015)] have suggested that Li0.9Mo6O17, a quasi-one-dimensional "purple bronze" compound, exhibits spin-triplet superconductivity and that the gap function changes sign across the two nearly degenerate Fermi surface sheets. We investigate the role of spin-orbit coupling (SOC) in determining the symmetry and orientation of the d vector associated with the superconducting order parameter. We propose that the lack of local inversion symmetry within the four-atom unit cell leads to a spin-orbit coupling analogous to that proposed for graphene, MoS2, or SrPtAs. In addition, from a weak-coupling renormalization group treatment of an effective model Hamiltonian, we find that SOC favors the odd parity A1u state with Sz=±1 over the B states with Sz=0, where z denotes the least-conducting direction. We discuss possible definitive experimental signatures of this superconducting state.
Keyword Spin-orbit coupling
SOC
Odd-parity superconductivity
Quasi-one-dimensional compound Li0.9Mo6O17
Li0.9Mo6O17
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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