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Anisotropic phase d...
Anisotropic phase diagram and superconducting fluctuations of single-crystalline SmFeAsO(0.85)F(0.15)
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Welp, U. (author)
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Chaparro, C. (author)
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Koshelev, A. E. (author)
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Kwok, W. K. (author)
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- Rydh, Andreas (author)
- Stockholms universitet,Fysikum
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Zhigadlo, N. D. (author)
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Karpinski, J. (author)
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Weyeneth, S. (author)
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(creator_code:org_t)
- 2011
- 2011
- English.
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In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 83:10, s. 100513-
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- We report on the specific-heat determination of the anisotropic phase diagram of single crystals of optimally doped SmFeAsO(1-x)F(x). In zero field, we find a clear cusplike anomaly in C/T with Delta C/T(c) = 24 mJ/mol K(2) at T(c) = 49.5 K. In magnetic fields along the c axis, pronounced superconducting fluctuations induce broadening and suppression of the specific-heat anomaly which can be described using three-dimensional lowest-Landau-level scaling with an upper critical field slope of -3.5 T/K and an anisotropy of Gamma = 8. The small value of Delta C/T(c) yields a Sommerfeld coefficient gamma similar to 8 mJ/mol K(2), indicating that SmFeAsO(1-x)F(x) is characterized by a modest density of states and strong coupling.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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