Pressure effects on the transport coefficients of Ba(Fe1-xCox)2As2

Abstract

We report the temperature dependence of the resistivity and thermoelectric power under hydrostatic pressure of the itinerant antiferromagnet BaFe2As2 and the electron-doped superconductor Ba(Fe0.9Co0.1)2As2. We observe a hole-like contribution to the thermopower below the structural-magnetic transition in the parent compound that is suppressed in magnitude and temperature with pressure. Pressure increases the contribution of electrons to transport in both the doped and undoped compound. In the 10% Co-doped sample, we used a two-band model for thermopower to estimate the carrier concentrations and determine the effect of pressure on the band structure.

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• Thermoelectric properties of iron-based superconductors and parent compounds
• Hydrostatic and uniaxial pressure tuning of iron-based superconductors: Insights into superconductivity, magnetism, nematicity and collapsed tetragonal transitions
• Signatures of quantum criticality in the thermopower of Ba(Fe(1-x)Co(x))2As2
• Anomalous Magnetothermopower in a Metallic Frustrated Antiferromagnet
• Magneto Seebeck effect in REFeAsO (RE=rare earth) compounds: probing the magnon drag scenario
• Superconductivity tuned by the iron vacancy order in K${}_{\mathbf{x}}$Fe${}_{2-\mathbf{y}}$Se${}_2$
• Anisotropy of the Seebeck and Nernst coefficients in parent compounds of the iron-based superconductors
• Magnetotransport studies of Superconducting Pr${}_4$Fe${}_2$As${}_2$Te${}_{1-x}$O${}_4$
• Apparatus Design for Measuring of the Strain Dependence of the Seebeck Coefficient of Single Crystals
• Effect of Co doping and hydrostatic pressure on SrFe2As2