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Pressure induced renormalization of energy scales in the unconventional superconductor FeTe0.6Se0.4
Karol Marty, Andrew D. Christianson, Antonio M. dos Santos +8
We have carried out a pressure study of the unconventional superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering, resistivity and magnetic susceptibility measurements. We…
Effect of Molybdenum 4d Hole Substitution in BaFe2As2
Athena S. Sefat, Karol Marty, Andrew D. Christianson +5
We investigate the thermodynamic and transport properties of molybdenum-doped BaFe2As2 (122) crystals, the first report of hole doping using a 4d element. The chemical substitution…
Spatial Inhomogeneity in RFeAsO1-xFx (R =Pr, Nd) Determined from Rare Earth Crystal Field Excitations
E. A. Goremychkin, R. Osborn, C. H. Wang +8
We report inelastic neutron scattering measurements of crystal field transitions in PrFeAsO, PrFeAsO0.87F0.13, and NdFeAsO0.85F0.15. Doping with fluorine produces additional crysta…
Thermoelectric properties of Co, Ir, and Os-Doped FeSi Alloys: Evidence for Strong Electron-Phonon Coupling
Brian C. Sales, Olivier Delaire, Michael A. McGuire +1
The effects of various transition metal dopants on the electrical and thermal transport properties of Fe1-xMxSi alloys (M= Co, Ir, Os) are reported. The maximum thermoelectric figu…
Unusual Phase Transitions and Magnetoelastic Coupling in TlFe1.6Se2 Single Crystals
Brian C. Sales, Michael A. McGuire, Andrew F. May +3
Structural, magnetic, electrical transport, and heat capacity data are reported for single crystals of TlFe1.6Se2. This compound crystallizes in a tetragonal structure similar to t…
Formation of Collapsed Tetragonal Phase in EuCo2As2 under High Pressure
Matthew Bishop, Walter Uhoya, Georgiy Tsoi +3
The structural properties of EuCo2As2 have been studied up to 35 GPa, through the use of x-ray diffraction in a diamond anvil cell at a synchrotron source. At ambient conditions, E…