Dynamics of local bond correlations in FeSe x Te1-x by inelastic neutron scattering

Keeseong Park; Jon W. Taylor; Despina Louca

doi:10.1007/s10948-014-2547-7

Dynamics of local bond correlations in FeSe _x Te_1-x by inelastic neutron scattering

Keeseong Park
, Jon W. Taylor
, Despina Louca

Department of Physics and Chemistry

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

5 Scopus citations

Abstract

The dynamics of the local atomic pair correlations in the FeSe _x Te_1-x (x = 0.1, 0.5, and 0.9) system were investigated using the dynamic pair density function analysis obtained from inelastic neutron scattering. Distinct differences are observed between the superconducting and nonsuperconducting compositions, particularly involving the local dynamics of the Fe-Fe correlations. The energy scale of the observed differences is between 25 and 30 meV. In the nonsuperconducting FeSe_0.1Te_0.9, the Fe-Fe correlations are enhanced with cooling that may signal stronger exchange interactions, while in the superconducting compositions of FeSe _0.9Te_0.1 and FeSe_0.5Te_0.5, they are suppressed.

Original language	English
Pages (from-to)	1927-1934
Number of pages	8
Journal	Journal of Superconductivity and Novel Magnetism
Volume	27
Issue number	8
DOIs	https://doi.org/10.1007/s10948-014-2547-7
State	Published - Aug 2014

Keywords

Atomic correlations
Fe-based supersconductors
Local dynamics
Superconductivity

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10.1007/s10948-014-2547-7

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title = "Dynamics of local bond correlations in FeSe x Te1-x by inelastic neutron scattering",

abstract = "The dynamics of the local atomic pair correlations in the FeSe x Te1-x (x = 0.1, 0.5, and 0.9) system were investigated using the dynamic pair density function analysis obtained from inelastic neutron scattering. Distinct differences are observed between the superconducting and nonsuperconducting compositions, particularly involving the local dynamics of the Fe-Fe correlations. The energy scale of the observed differences is between 25 and 30 meV. In the nonsuperconducting FeSe0.1Te0.9, the Fe-Fe correlations are enhanced with cooling that may signal stronger exchange interactions, while in the superconducting compositions of FeSe 0.9Te0.1 and FeSe0.5Te0.5, they are suppressed.",

keywords = "Atomic correlations, Fe-based supersconductors, Local dynamics, Superconductivity",

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T1 - Dynamics of local bond correlations in FeSe x Te1-x by inelastic neutron scattering

AU - Park, Keeseong

AU - Taylor, Jon W.

AU - Louca, Despina

PY - 2014/8

Y1 - 2014/8

N2 - The dynamics of the local atomic pair correlations in the FeSe x Te1-x (x = 0.1, 0.5, and 0.9) system were investigated using the dynamic pair density function analysis obtained from inelastic neutron scattering. Distinct differences are observed between the superconducting and nonsuperconducting compositions, particularly involving the local dynamics of the Fe-Fe correlations. The energy scale of the observed differences is between 25 and 30 meV. In the nonsuperconducting FeSe0.1Te0.9, the Fe-Fe correlations are enhanced with cooling that may signal stronger exchange interactions, while in the superconducting compositions of FeSe 0.9Te0.1 and FeSe0.5Te0.5, they are suppressed.

AB - The dynamics of the local atomic pair correlations in the FeSe x Te1-x (x = 0.1, 0.5, and 0.9) system were investigated using the dynamic pair density function analysis obtained from inelastic neutron scattering. Distinct differences are observed between the superconducting and nonsuperconducting compositions, particularly involving the local dynamics of the Fe-Fe correlations. The energy scale of the observed differences is between 25 and 30 meV. In the nonsuperconducting FeSe0.1Te0.9, the Fe-Fe correlations are enhanced with cooling that may signal stronger exchange interactions, while in the superconducting compositions of FeSe 0.9Te0.1 and FeSe0.5Te0.5, they are suppressed.

KW - Atomic correlations

KW - Fe-based supersconductors

KW - Local dynamics

KW - Superconductivity

UR - https://www.scopus.com/pages/publications/84904515754

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DO - 10.1007/s10948-014-2547-7

M3 - Article

AN - SCOPUS:84904515754

SN - 1557-1939

VL - 27

SP - 1927

EP - 1934

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 8

ER -

Dynamics of local bond correlations in FeSe _x Te_1-x by inelastic neutron scattering

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Keywords

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