Superconductivity in a new layered bismuth oxyselenide: LaO(0.5)F(0.5)BiSe₂

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: LaO(0.5)F(0.5)BiSe₂

J Phys Condens Matter. 2014 May 28;26(21):215702. doi: 10.1088/0953-8984/26/21/215702. Epub 2014 May 8.

Authors

A Krzton-Maziopa¹, Z Guguchia, E Pomjakushina, V Pomjakushin, R Khasanov, H Luetkens, P K Biswas, A Amato, H Keller, K Conder

Affiliation

¹ Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.

PMID: 24805837
DOI: 10.1088/0953-8984/26/21/215702

Abstract

We report superconductivity at T(c) ≈ 2.6 K in a new layered bismuth oxyselenide LaO(0.5)F(0.5)BiSe2 with the ZrCuSiAs-type structure composed of alternating superconducting BiSe2 and blocking LaO layers. The superconducting properties of LaO(0.5)F(0.5)BiSe2 were investigated by means of dc magnetization, resistivity and muon-spin rotation experiments, revealing the appearance of bulk superconductivity with a rather large superconducting volume fraction of ≈ 70% at 1.8 K.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Bismuth / chemistry*
Electric Conductivity*
Fluorides / chemistry*
Lanthanum / chemistry*
Molecular Structure
Oxides / chemistry*
Selenium Compounds / chemistry*

Substances

Oxides
Selenium Compounds
lanthanum oxide
Lanthanum
Fluorides
Bismuth