Thermoelectric power and Hall coefficient measurements on Ba(Fe1-xTx)(2)As-2 (T=Co and Cu)

dc.contributor.author Mun, Eun Deok
dc.contributor.author Bud'ko, Sergey L.
dc.contributor.author Ni, Ni
dc.contributor.author Thaler, Alex N.
dc.contributor.author Canfield, Paul
dc.contributor.department Ames National Laboratory
dc.date.accessioned 2022-07-27T15:28:57Z
dc.date.available 2022-07-27T15:28:57Z
dc.date.issued 2009-08-01
dc.description.abstract Temperature-dependent thermoelectric power (TEP) data on Ba(Fe1-xTMx)(2)As-2 (TM=Co and Cu), complemented by the Hall coefficient data on the samples from the same batches, have been measured. For Co doping we clearly see a change in the temperature-dependent TEP and Hall coefficient data when the sample is doped to sufficient e (the number of extra electrons associated with the TM doping) so as to stabilize low-temperature superconductivity. Remarkably, a similar change is found in the Cu-doped samples at comparable e value, even though these compounds do not superconduct. These changes possibly point to a significant modification of the Fermi surface/band structure of Ba(Fe1-xTMx)(2)As-2 at small electron doping, that in the case of Co doping is just before, and probably allows for, the onset of superconductivity. These data further suggest that suppression of the structural/magnetic phase transition and the establishment of a proper e value are each necessary but, individually, not sufficient conditions for superconductivity.
dc.description.comments This article is published as Mun, Eun Deok, Sergey L. Bud’ko, Ni Ni, Alex N. Thaler, and Paul C. Canfield. "Thermoelectric power and Hall coefficient measurements on Ba (Fe 1− x T x) 2 As 2 (T= Co and Cu)." Physical Review B 80, no. 5 (2009): 054517. DOI: 10.1103/PhysRevB.80.054517. Copyright 2009 American Physical Society. Posted with permission.
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/qzoDEDXw
dc.language.iso en
dc.publisher American Physical Society
dc.source.uri https://doi.org/10.1103/PhysRevB.80.054517 *
dc.title Thermoelectric power and Hall coefficient measurements on Ba(Fe1-xTx)(2)As-2 (T=Co and Cu)
dc.type Article
dspace.entity.type Publication
relation.isAuthorOfPublication c5a8128b-7d98-4b8f-92d7-b1385e345713
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
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