Contrasting Spin Dynamics between Underdoped and Overdoped Ba(Fe1-xCox)2As2

F. L. Ning; K. Ahilan; T. Imai; A. S. Sefat; M. A. McGuire; B. C. Sales; D. Mandrus; P. Cheng; B. Shen; H. H. Wen

doi:10.1103/PhysRevLett.104.037001

Contrasting Spin Dynamics between Underdoped and Overdoped Ba(Fe1-xCox)2As2

F. L. Ning
, K. Ahilan
, T. Imai
, A. S. Sefat
, M. A. McGuire
, B. C. Sales
, D. Mandrus
, P. Cheng
, B. Shen
, H. H. Wen

Correlated Electron Materials

Research output: Contribution to journal › Article › peer-review

231 Scopus citations

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 QAF∼(π/a,0) between the hole and electron Fermi surfaces results in complete suppression of antiferromagnetic spin fluctuations for x 0.15. Our experimental results provide direct evidence for a correlation between Tc and the strength of QAF antiferromagnetic spin fluctuations.

Original language	English
Article number	037001
Journal	Physical Review Letters
Volume	104
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.104.037001
State	Published - Jan 22 2010

Access to Document

10.1103/PhysRevLett.104.037001

Cite this

@article{24e83fe5ae8d4b5ca53358bf0c42f3d7,

title = "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 QAF∼(π/a,0) between the hole and electron Fermi surfaces results in complete suppression of antiferromagnetic spin fluctuations for x 0.15. Our experimental results provide direct evidence for a correlation between Tc and the strength of QAF antiferromagnetic spin fluctuations.",

author = "Ning, \{F. L.\} and K. Ahilan and T. Imai and Sefat, \{A. S.\} and McGuire, \{M. A.\} and Sales, \{B. C.\} and D. Mandrus and P. Cheng and B. Shen and Wen, \{H. H.\}",

year = "2010",

month = jan,

day = "22",

doi = "10.1103/PhysRevLett.104.037001",

language = "English",

volume = "104",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "3",

}

TY - JOUR

T1 - Contrasting Spin Dynamics between Underdoped and Overdoped Ba(Fe1-xCox)2As2

AU - Ning, F. L.

AU - Ahilan, K.

AU - Imai, T.

AU - Sefat, A. S.

AU - McGuire, M. A.

AU - Sales, B. C.

AU - Mandrus, D.

AU - Cheng, P.

AU - Shen, B.

AU - Wen, H. H.

PY - 2010/1/22

Y1 - 2010/1/22

N2 - 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 QAF∼(π/a,0) between the hole and electron Fermi surfaces results in complete suppression of antiferromagnetic spin fluctuations for x 0.15. Our experimental results provide direct evidence for a correlation between Tc and the strength of QAF antiferromagnetic spin fluctuations.

AB - 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 QAF∼(π/a,0) between the hole and electron Fermi surfaces results in complete suppression of antiferromagnetic spin fluctuations for x 0.15. Our experimental results provide direct evidence for a correlation between Tc and the strength of QAF antiferromagnetic spin fluctuations.

UR - https://www.scopus.com/pages/publications/75149148599

U2 - 10.1103/PhysRevLett.104.037001

DO - 10.1103/PhysRevLett.104.037001

M3 - Article

AN - SCOPUS:75149148599

SN - 0031-9007

VL - 104

JO - Physical Review Letters

JF - Physical Review Letters

IS - 3

M1 - 037001

ER -

Contrasting Spin Dynamics between Underdoped and Overdoped Ba(Fe1-xCox)2As2

Abstract

Access to Document

Other files and links

Fingerprint

Cite this