Modified magnetism within the coherence volume of superconducting Fe1+δ Sex Te1-x

J. Leiner; V. Thampy; A. D. Christianson; D. L. Abernathy; M. B. Stone; M. D. Lumsden; A. S. Sefat; B. C. Sales; Jin Hu; Zhiqiang Mao; Wei Bao; C. Broholm

doi:10.1103/PhysRevB.90.100501

Author(s)

J. Leiner
V. Thampy
A. D. Christianson
D. L. Abernathy
M. B. Stone
M. D. Lumsden
A. S. Sefat
B. C. Sales
Jin Hu
Zhiqiang Mao
C. Broholm

Detail(s)

Original language	English
Article number	100501
Journal / Publication	Physical Review B - Condensed Matter and Materials Physics
Volume	90
Issue number	10
Online published	1 Sept 2014
Publication status	Published - 2 Sept 2014
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1103/PhysRevB.90.100501 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84940423890&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(440b9d60-fff0-42ab-bf88-a61a92494cb7).html

Abstract

Neutron scattering is used to probe magnetic interactions as superconductivity develops in optimally doped Fe_1+δSe_xTe_1-x. Applying the first moment sum rule to comprehensive neutron scattering data, we extract the change in magnetic exchange energy Δ[ J_R-R′⟨S_R·S_R′⟩] in the superconducting state referenced to the normal state. Oscillatory changes are observed for Fe-Fe displacements |ΔR| < ξ, where ξ = 1.3(1) nm is the superconducting coherence length. Dominated by a large reduction in the second nearest neighbor exchange energy [-1.2(2) meV/Fe], the overall reduction in magnetic interaction energy is Δ⟨H_mag⟩=-0.31(9) meV/Fe. Comparison to the superconducting condensation energy ΔE_SC=-0.013(1) meV/Fe, which we extract from specific heat data, suggests the modified magnetism we probe drives superconductivity in Fe_1+δSe_xTe_1-x.

Citation Format(s)

[ RIS ] [ BibTeX ]

Modified magnetism within the coherence volume of superconducting Fe_1+δ Se_x Te_1-x. / Leiner, J.; Thampy, V.; Christianson, A. D. et al.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 90, No. 10, 100501, 02.09.2014.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Leiner, J, Thampy, V, Christianson, AD, Abernathy, DL, Stone, MB, Lumsden, MD, Sefat, AS, Sales, BC, Hu, J, Mao, Z, Bao, W & Broholm, C 2014, 'Modified magnetism within the coherence volume of superconducting Fe_1+δ Se_x Te_1-x', Physical Review B - Condensed Matter and Materials Physics, vol. 90, no. 10, 100501. https://doi.org/10.1103/PhysRevB.90.100501

Leiner, J., Thampy, V., Christianson, A. D., Abernathy, D. L., Stone, M. B., Lumsden, M. D., Sefat, A. S., Sales, B. C., Hu, J., Mao, Z., Bao, W., & Broholm, C. (2014). Modified magnetism within the coherence volume of superconducting Fe_1+δ Se_x Te_1-x. Physical Review B - Condensed Matter and Materials Physics, 90(10), Article 100501. https://doi.org/10.1103/PhysRevB.90.100501

Leiner J, Thampy V, Christianson AD, Abernathy DL, Stone MB, Lumsden MD et al. Modified magnetism within the coherence volume of superconducting Fe_1+δ Se_x Te_1-x. Physical Review B - Condensed Matter and Materials Physics. 2014 Sept 2;90(10):100501. Epub 2014 Sept 1. doi: 10.1103/PhysRevB.90.100501

Leiner, J. ; Thampy, V. ; Christianson, A. D. et al. / Modified magnetism within the coherence volume of superconducting Fe_1+δ Se_x Te_1-x. In: Physical Review B - Condensed Matter and Materials Physics. 2014 ; Vol. 90, No. 10.