Structure of spin excitations in heavily electron-doped Li0.8Fe0.2ODFeSe superconductors

Bingying Pan, Yao Shen, Die Hu, Yu Feng, J. T. Park, A. D. Christianson, Qisi Wang, Yiqing Hao, Hongliang Wo, Zhiping Yin, T. A. Maier and Jun Zhao ()
Additional contact information
Bingying Pan: Fudan University
Yao Shen: Fudan University
Die Hu: Fudan University
Yu Feng: Fudan University
J. T. Park: Technische Universität München
A. D. Christianson: Oak Ridge National Laboratory
Qisi Wang: Fudan University
Yiqing Hao: Fudan University
Hongliang Wo: Fudan University
Zhiping Yin: Beijing Normal University
T. A. Maier: Oak Ridge National Laboratory
Jun Zhao: Fudan University

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

Abstract: Abstract Heavily electron-doped iron-selenide high-transition-temperature (high-T c) superconductors, which have no hole Fermi pockets, but have a notably high T c, have challenged the prevailing s ± pairing scenario originally proposed for iron pnictides containing both electron and hole pockets. The microscopic mechanism underlying the enhanced superconductivity in heavily electron-doped iron-selenide remains unclear. Here, we used neutron scattering to study the spin excitations of the heavily electron-doped iron-selenide material Li0.8Fe0.2ODFeSe (T c = 41 K). Our data revealed nearly ring-shaped magnetic resonant excitations surrounding (π, π) at ∼21 meV. As the energy increased, the spin excitations assumed a diamond shape, and they dispersed outward until the energy reached ∼60 meV and then inward at higher energies. The observed energy-dependent momentum structure and twisted dispersion of spin excitations near (π, π) are analogous to those of hole-doped cuprates in several aspects, thus implying that such spin excitations are essential for the remarkably high T c in these materials.

Date: 2017
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-017-00162-x 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_s41467-017-00162-x

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

DOI: 10.1038/s41467-017-00162-x

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 ().