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

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.84.075148· OSTI ID:1025878

Arsenijevic, S. ^[1]; Gaal, R ^[1]; Sefat, A. S. ^[2]; McGuire, Michael A ^[3]; Sales, Brian C ^[3]; Mandrus, David ^[3]; Forro, Laszlo ^[4]

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1. Institute of Condensed Matter Physics, EPFL, Lausanne, Switzerland
2. Oak Ridge National Laboratory (ORNL)
3. ORNL
4. Institut de Physique de la Matiere Complexe

We report the temperature dependence of the resistivity and thermoelectric power (TEP) under hydrostatic pressure of the itinerant antiferromagnet BaFe{sub 2}As{sub 2} and the electron-doped superconductor Ba(Fe{sub 0.9}Co{sub 0.1}){sub 2}As{sub 2}. We observe a hole-like contribution to the thermopower below the structural/magnetic (S-M) 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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1025878
• Journal Information: Physical Review B, Vol. 84, Issue 7; ISSN 1098--0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRONS
HYDROSTATICS
PRESSURE DEPENDENCE
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSPORT