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Signatures of quantum criticality in the thermopower of Ba(Fe1-xCox)(2)As-2

TitleSignatures of quantum criticality in the thermopower of Ba(Fe1-xCox)(2)As-2
Publication TypeJournal Article
Year of Publication2013
AuthorsArsenijevic, S, Hodovanets, H, Gaal, R, Forro, L, Bud'ko, SL, Canfield, PC
JournalPhysical Review B
Date Published06
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000320609300003
Keywordsbafe2(as1-xpx)(2), critical-point, cuprate, fermi-liquid behavior, instability, iron arsenide superconductor, resistivity, superconductors, surface, temperature, transition

0.1 is bordered by two Lifshitz transitions, and it corresponds to the superconducting region, where a similarity between the electron and nonreconstructed hole pockets exists. The maximal S/T is observed in proximity to the commensurate-to-incommensurate SDW transition, for critical x(c) approximate to 0.05, close to the highest superconducting T-c. This analysis indicates that low-T thermopower is influenced by critical spin fluctuations which are important for the superconducting mechanism.

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Complex States