Anisotropic and quasipropagating spin excitations in superconducting Ba (Fe0.926 Co0.074)2 As2

doi:10.1103/PhysRevB.82.140503

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	Anisotropic and quasipropagating spin excitations in superconducting Ba (Fe0.926 Co0.074)2 As2
	Li, H.-F.; Broholm, C.; Vaknin, D.; Fernandes, R.M.; Abernathy, D. L.; Stone, M. B.; Pratt, D. K.; Tian, W.; Qiu, Y. M.; Ni, N.; Diallo, S. O.; Zarestky, J. L.; Bud'Ko, S. L.; Canfield, P. C.; McQueeney, R. J.
	2010-10-12
Source Publication	Physical Review B - Condensed Matter and Materials Physics
ISSN	2469-9950
Pages	140503(R)-1-140503(R)-4
Abstract	Inelastic neutron scattering from superconducting (SC) Ba(Fe0.926Co0.074)2As2 reveals anisotropic and quasi-two-dimensional (2D) magnetic excitations close to QAFM=(1212) - the 2D antiferromagnetic (AFM) wave vector of the parent BaFe2As2 compound. The correlation length anisotropy of these low-energy fluctuations is consistent with spin nematic correlations in the J1−J2 model with J1/J2∼1. The spin resonance at ∼8.3 meV in the SC state displays the same anisotropy. The anisotropic fluctuations experimentally evolve into two distinct maxima only along the direction transverse to QAFM above ∼80 meV indicating unusual quasipropagating excitations.
Keyword	Spin Excitations Ba(Fe0.926co0.074)2as2
DOI	10.1103/PhysRevB.82.140503
URL	View the original
Language	英語English
WOS ID	WOS:000282809100004
The Source to Article	PB_Publication
Scopus ID	2-s2.0-78049416453
Fulltext Access	View Full-Text via DOI View Full-Text via Web of Science View Full-Text via Scopus
Citation statistics
Document Type	Journal article
Collection	University of Macau
Recommended Citation GB/T 7714	Li, H.-F.,Broholm, C.,Vaknin, D.,et al. Anisotropic and quasipropagating spin excitations in superconducting Ba (Fe0.926 Co0.074)2 As2[J]. Physical Review B - Condensed Matter and Materials Physics, 2010, 140503(R)-1-140503(R)-4.
APA	Li, H.-F.., Broholm, C.., Vaknin, D.., Fernandes, R.M.., Abernathy, D. L.., Stone, M. B.., Pratt, D. K.., Tian, W.., Qiu, Y. M.., Ni, N.., Diallo, S. O.., Zarestky, J. L.., Bud'Ko, S. L.., Canfield, P. C.., & McQueeney, R. J. (2010). Anisotropic and quasipropagating spin excitations in superconducting Ba (Fe0.926 Co0.074)2 As2. Physical Review B - Condensed Matter and Materials Physics, 140503(R)-1-140503(R)-4.
MLA	Li, H.-F.,et al."Anisotropic and quasipropagating spin excitations in superconducting Ba (Fe0.926 Co0.074)2 As2".Physical Review B - Condensed Matter and Materials Physics (2010):140503(R)-1-140503(R)-4.

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