Journal article
Contrasting Spin Dynamics between Underdoped and Overdoped Ba(Fe1-xCox)2As2
Abstract
We report the first NMR investigation of spin dynamics in the overdoped nonsuperconducting regime of Ba(Fe1-xCox)2As2 up to x=0.26. We demonstrate that the absence of interband transitions with large momentum transfer Q{AF} approximately (pi/a,0) between the hole and electron Fermi surfaces results in complete suppression of antiferromagnetic spin fluctuations for x greater than or approximately 0.15. Our experimental results provide direct …
Authors
Ning FL; Ahilan K; Imai T; Sefat AS; McGuire MA; Sales BC; Mandrus D; Cheng P; Shen B; Wen H-H
Journal
Physical Review Letters, Vol. 104, No. 3,
Publisher
American Physical Society (APS)
Publication Date
January 22, 2010
DOI
10.1103/physrevlett.104.037001
ISSN
0031-9007