Magnonlike Dispersion of Spin Resonance in Ni-doped BaFe2As2

TitleMagnonlike Dispersion of Spin Resonance in Ni-doped BaFe2As2
Publication TypeJournal Article
Year of Publication2013
AuthorsKim MG, Tucker GS, Pratt DK, Ran S, Thaler A, Christianson AD, Marty K, Calder S, Podlesnyak A, Bud'ko SL, Canfield PC, Kreyssig A, Goldman AI, McQueeney RJ
Journal TitlePhysical Review Letters
Volume110
Pages177002
Date Published04
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberWOS:000317967700011
Keywordssuperconductors
Abstract

Inelastic neutron scattering measurements on Ba(Fe0.963Ni0.037)(2)As-2 manifest a neutron spin resonance in the superconducting state with anisotropic dispersion within the Fe layer. Whereas the resonance is sharply peaked at the antiferromagnetic (AFM) wave vector Q(AFM) along the orthorhombic a axis, the resonance disperses upwards away from Q(AFM) along the b axis. In contrast to the downward dispersing resonance and hourglass shape of the spin excitations in superconducting cuprates, the resonance in electron-doped BaFe2As2 compounds possesses a magnonlike upwards dispersion. DOI:10.1103/PhysRevLett.110.177002

URL<Go to ISI>://WOS:000317967700011
DOI10.1103/PhysRevLett.110.177002