Electronic Behavior of Superconducting SmFeAsO0.75

Details Electronic Behavior of Superconducting SmFeAsO0.75 Electronic Behavior of Superconducting SmFeAsO0.75

2011-02-28

arxiv.org/abs/1102.5569v1

Journal of Applied Physics, 109, 083914 (2011)

Physics

Condensed Matter

Superconductivity

10 pages, 6 figures

Scientific paper

10.1063/1.3573667

High-quality polycrystalline SmFeAsO0.75 was synthesized with a superconducting transition width less than 1 K, and the electronic behavior was systematically studied by transport and specific heat measurements. An obvious superconducting jump was witnessed, together with a very small normalized superconducting jump, which is much smaller than expected by the BCS theory. A strong temperature dependent Hall coefficient was found and attributed to the partial gapping of the Fermi surface up to the temperature of 160 K which was predicted and supported by the emergence of the pseudogap. The charge-carrier density as well as the effective mass were also obtained and discussed in detail.

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