Superconductivity in a new layered bismuth oxyselenide: LaO0.5F0.5BiSe2

A. Krzton-Maziopa; Z. Guguchia; E. Pomjakushina; V. Pomjakushin; R. Khasanov; H. Luetkens; P. K. Biswas; A. Amato; H. Keller; K. Conder

doi:10.1088/0953-8984/26/21/215702

Superconductivity in a new layered bismuth oxyselenide: LaO0.5F0.5BiSe2

Superconductivity 2014-05-21 v2

Authors: A. Krzton-Maziopa , Z. Guguchia , E. Pomjakushina , V. Pomjakushin , R. Khasanov , H. Luetkens , P. K. Biswas , A. Amato , H. Keller , K. Conder

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Abstract

We report superconductivity in a new layered bismuth oxyselenide LaO0.5F0.5BiSe2 with the ZrCuSiAs-type structure composed of alternating superconducting BiSe2 and blocking LaO layers. The superconducting transition temperature is TC = 2.6K, as revealed from DC magnetization, resistivity and muon spin rotation (muSR) experiments. DC magnetization measurements indicate a superconducting volume fraction of approximately 80%, which is at least twice higher in comparison to that found in corresponding sulphide LaO0.5F0.5BiS2. Importantly, the bulk character of superconductivity in LaO0.5F0.5BiSe2 was confirmed by muSR.

Keywords

superconductivity bismuth oxyselenide LaO0.5F0.5BiSe2 ZrCuSiAs-type structure transition temperature muon spin rotation bulk superconductivity

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@article{arxiv.1310.8131,
  title  = {Superconductivity in a new layered bismuth oxyselenide: LaO0.5F0.5BiSe2},
  author = {A. Krzton-Maziopa and Z. Guguchia and E. Pomjakushina and V. Pomjakushin and R. Khasanov and H. Luetkens and P. K. Biswas and A. Amato and H. Keller and K. Conder},
  journal= {arXiv preprint arXiv:1310.8131},
  year   = {2014}
}

Superconductivity in a new layered bismuth oxyselenide: LaO0.5F0.5BiSe2

Abstract

Keywords

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