Spin Gap and Resonance at the Nesting Wave Vector in Superconducting FeSe0.4Te0.6

Yiming Qiu; Wei Bao; Y. Zhao; Collin Broholm; V. Stanev; Z. Tesanovic; Y. C. Gasparovic; S. Chang; Jin Hu; Bin Qian; Minghu Fang; Zhiqiang Mao

doi:10.1103/PhysRevLett.103.067008

Author(s)

Yiming Qiu
Y. Zhao
Collin Broholm
V. Stanev
Z. Tesanovic
Y. C. Gasparovic
S. Chang
Jin Hu
Bin Qian
Minghu Fang
Zhiqiang Mao

Detail(s)

Original language	English
Article number	067008
Journal / Publication	Physical Review Letters
Volume	103
Issue number	6
Online published	7 Aug 2009
Publication status	Published - 7 Aug 2009
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1103/PhysRevLett.103.067008 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-68849099792&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(0a1bb5e1-0e14-4cbe-9887-c09016c14808).html

Abstract

Neutron scattering is used to probe magnetic excitations in FeSe_0.4Te_0.6 (T_c= 14 K). Low energy spin fluctuations are found with a characteristic wave vector (½ ½ L) that corresponds to Fermi surface nesting and differs from Q_m= (δ0 ½) for magnetic ordering in Fe_1+yTe. A spin resonance with h^-Ω₀= 6.51(4) meV ≈ 5.3k_BT_c and h^-Γ = 1.25(5) meV develops in the superconducting state from a normal state continuum. We show that the resonance is consistent with a bound state associated with s_± superconductivity and imperfect quasi-2D Fermi surface nesting.

Citation Format(s)

[ RIS ] [ BibTeX ]

Spin Gap and Resonance at the Nesting Wave Vector in Superconducting FeSe_0.4Te_0.6. / Qiu, Yiming; Bao, Wei; Zhao, Y. et al.

In: Physical Review Letters, Vol. 103, No. 6, 067008, 07.08.2009.

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

Qiu, Y, Bao, W, Zhao, Y, Broholm, C, Stanev, V, Tesanovic, Z, Gasparovic, YC, Chang, S, Hu, J, Qian, B, Fang, M & Mao, Z 2009, 'Spin Gap and Resonance at the Nesting Wave Vector in Superconducting FeSe_0.4Te_0.6', Physical Review Letters, vol. 103, no. 6, 067008. https://doi.org/10.1103/PhysRevLett.103.067008

Qiu, Y., Bao, W., Zhao, Y., Broholm, C., Stanev, V., Tesanovic, Z., Gasparovic, Y. C., Chang, S., Hu, J., Qian, B., Fang, M., & Mao, Z. (2009). Spin Gap and Resonance at the Nesting Wave Vector in Superconducting FeSe_0.4Te_0.6. Physical Review Letters, 103(6), [067008]. https://doi.org/10.1103/PhysRevLett.103.067008

Qiu Y, Bao W, Zhao Y, Broholm C, Stanev V, Tesanovic Z et al. Spin Gap and Resonance at the Nesting Wave Vector in Superconducting FeSe_0.4Te_0.6. Physical Review Letters. 2009 Aug 7;103(6):067008. Epub 2009 Aug 7. doi: 10.1103/PhysRevLett.103.067008

Qiu, Yiming ; Bao, Wei ; Zhao, Y. et al. / Spin Gap and Resonance at the Nesting Wave Vector in Superconducting FeSe_0.4Te_0.6. In: Physical Review Letters. 2009 ; Vol. 103, No. 6.