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Title: Pressure induced evolution of superconductivity and magnetic hourglass dispersion in Fe1.02Te0.7Se0.3
Authors: Lancon, D.
Tsyrulin, N.
Boehm, M.
Viennois, R.
Zabihzadeh, S.
Kusmartseva, Anna F.
Giannini, E.
Ronnow, H.M.
Keywords: Superconductivity
Neutron scattering
Issue Date: 2015
Publisher: © The Authors. Published by IOP Publishing LTD
Citation: LANCON, D. ...et al., 2015. Pressure induced evolution of superconductivity and magnetic hourglass dispersion in Fe1.02Te0.7Se0.3. New Journal of Physics, 17, 043020.
Abstract: Iron based high temperature superconductors have several common features with superconducting cuprates, including the square lattice and the proximity to an antiferromagnetic phase. The magnetic excitation spectrumbelowTc of Fe1.02Te0.7Se0.3 shows an hourglass-shaped dispersion with a resonance around the commensurate point . In a previous inelastic neutron scattering study, we showed that the hourglass-shaped dispersion is most likely a prerequisite for superconductivity, while the consequences are the opening of a gap and a shift of spectral weight. In this paper we follow the evolution of the hourglass shaped dispersion under applied pressure up to 12 kbar. Our results show that that the pressure-induced 37% increase of Tc is concomitant with a change in the magnetic excitation spectrum, with an increase of the hourglass energy by 38%.
Description: This is an Open Access Article. It is published by IOP Publishing under the Creative Commons Attribution 3.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/
Version: Published
DOI: 10.1088/1367-2630/17/4/043020
URI: https://dspace.lboro.ac.uk/2134/20754
Publisher Link: http://dx.doi.org/10.1088/1367-2630/17/4/043020
ISSN: 1367-2630
Appears in Collections:Published Articles (Physics)

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