Possible Sign-Reversing <I>s</I>-Wave Superconductivity in Co-Doped BaFe<SUB>2</SUB>As<SUB>2</SUB> Proved by Thermal Transport Measurements
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- Machida Yo
- Department of Physics, Tokyo Institute of Technology
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- Tomokuni Kosuke
- Department of Physics, Tokyo Institute of Technology
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- Isono Takayuki
- Department of Physics, Tokyo Institute of Technology
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- Izawa Koichi
- Department of Physics, Tokyo Institute of Technology
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- Nakajima Yasuyuki
- Department of Applied Physics, The University of Tokyo JST, Transformative Research-Project on Iron Pnictides (TRIP)
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- Tamegai Tsuyoshi
- Department of Applied Physics, The University of Tokyo JST, Transformative Research-Project on Iron Pnictides (TRIP)
Bibliographic Information
- Other Title
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- Possible sign-reversing s-wave superconductivity in Co-doped BaFe2As2 proved by thermal transport measurements
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Abstract
Thermal transport measurements have been performed on single-crystalline Co-doped BaFe2As2 down to 0.1 K and under magnetic fields up to 7 T. Significant peak anomalies are observed in both thermal conductivity and thermal Hall conductivity below Tc as an indication of the enhancement of the quasiparticle mean-free path. Moreover, we find a sizable residual T-linear term in thermal conductivity, possibly due to a finite quasiparticle density of states in the superconducting gap induced by impurity pair breaking. Our findings support a pairing symmetry compatible with the theoretically predicted sign-reversing s-wave state.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 78 (7), 073705-073705, 2009
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204196644096
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- NII Article ID
- 130005437488
- 10025961928
- 210000107859
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- NII Book ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 10280405
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed