Three Dimensional Superconductivity in FeSe with Tczero Up to 10.9 K Induced by Internal Strain

Junyi Ge; Shixun Cao; Shujuan Yuan; Baojuan Kang; Jincang Zhang

doi:10.1063/1.3481096

Three Dimensional Superconductivity in FeSe with Tczero Up to 10.9 K Induced by Internal Strain

Superconductivity 2015-05-18 v1

Authors: Junyi Ge , Shixun Cao , Shujuan Yuan , Baojuan Kang , Jincang Zhang

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Abstract

Polycrystalline sample FeSe was synthesized by a self-flux solution method which shows a zero resistance temperature up to 10.9 K and a Tconset (90% \rhon, \rhon: normal state resistivity) up to 13.3 K. The decrease of superconducting transition temperature by heat treatment indicates that internal crystallographic strain which plays the same effect as external pressure is the origin of its high Tc. The fluctuation conductivity was studied which could be well described by 3D Aslamazov-Larkin (AL) power law. The estimated value of coherence length \xic=9.2 \AA is larger than the distance between conducting layers (~6.0 \AA), indicating the three-dimensional nature of superconductivity in this compound.

Keywords

FeSe three-dimensional superconductivity internal strain fluctuation conductivity Aslamazov-Larkin power law

Cite

@article{arxiv.1003.5415,
  title  = {Three Dimensional Superconductivity in FeSe with Tczero Up to 10.9 K Induced by Internal Strain},
  author = {Junyi Ge and Shixun Cao and Shujuan Yuan and Baojuan Kang and Jincang Zhang},
  journal= {arXiv preprint arXiv:1003.5415},
  year   = {2015}
}

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Three Dimensional Superconductivity in FeSe with Tczero Up to 10.9 K Induced by Internal Strain

Abstract

Keywords

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