77Se NMR study of the pairing symmetry and the spin dynamics in KyFe2-xSe2

Weiqiang Yu; L. Ma; J. B. He; D. M. Wang; T.-L. Xia; G. F. Chen; Wei Bao

doi:10.1103/PhysRevLett.106.197001

⁷⁷Se NMR study of the pairing symmetry and the spin dynamics in K_yFe_2-xSe₂

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

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Author(s)

Weiqiang Yu
L. Ma
J. B. He
D. M. Wang
T.-L. Xia
G. F. Chen

Detail(s)

Original language	English
Article number	197001
Journal / Publication	Physical Review Letters
Volume	106
Issue number	19
Online published	9 May 2011
Publication status	Published - 13 May 2011
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1103/PhysRevLett.106.197001 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-79960622683&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(bdfa4864-d21e-4da0-8532-75526cdb3161).html

Abstract

We present a ⁷⁷Se NMR study of the newly discovered iron selenide superconductor K_yFe_2-xSe₂ , in which T_c =32K. Below T_c , the Knight shift ⁷⁷K drops sharply with temperature, providing strong evidence for singlet pairing. Above T_c , Korringa-type relaxation indicates Fermi-liquid behavior. Our experimental results set strict constraints on the nature of possible theories for the mechanism of high-T_c superconductivity in this iron selenide system.

Citation Format(s)

[ RIS ] [ BibTeX ]

⁷⁷Se NMR study of the pairing symmetry and the spin dynamics in K_yFe_2-xSe₂. / Yu, Weiqiang; Ma, L.; He, J. B. et al.

In: Physical Review Letters, Vol. 106, No. 19, 197001, 13.05.2011.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Yu, W, Ma, L, He, JB, Wang, DM, Xia, T-L, Chen, GF & Bao, W 2011, '⁷⁷Se NMR study of the pairing symmetry and the spin dynamics in K_yFe_2-xSe₂', Physical Review Letters, vol. 106, no. 19, 197001. https://doi.org/10.1103/PhysRevLett.106.197001

Yu, W., Ma, L., He, J. B., Wang, D. M., Xia, T-L., Chen, G. F., & Bao, W. (2011). ⁷⁷Se NMR study of the pairing symmetry and the spin dynamics in K_yFe_2-xSe₂. Physical Review Letters, 106(19), [197001]. https://doi.org/10.1103/PhysRevLett.106.197001

Yu W, Ma L, He JB, Wang DM, Xia T-L, Chen GF et al. ⁷⁷Se NMR study of the pairing symmetry and the spin dynamics in K_yFe_2-xSe₂. Physical Review Letters. 2011 May 13;106(19):197001. Epub 2011 May 9. doi: 10.1103/PhysRevLett.106.197001

Yu, Weiqiang ; Ma, L. ; He, J. B. et al. / ⁷⁷Se NMR study of the pairing symmetry and the spin dynamics in K_yFe_2-xSe₂. In: Physical Review Letters. 2011 ; Vol. 106, No. 19.