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Electronic Behavior of Superconducting SmFeAsO0.75

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arxiv 1102.5569 v1 pith:2ODZEWSH submitted 2011-02-28 cond-mat.supr-con

Electronic Behavior of Superconducting SmFeAsO0.75

Y. Sun , Y. Ding , B. C. Zheng , Z. X. Shi , Z. A. Ren This is my paper
classification cond-mat.supr-con
keywords superconductingbehaviorelectronicjumpsmfeaso0temperatureattributedcharge-carrier
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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