Switching Magnetism and Superconductivity with Spin-Polarized Current in Iron-Based Superconductor

Journal: Physical Review Letters

Published: 2017-11-27

DOI: 10.1103/physrevlett.119.227001

Affiliations: 14

Authors: 14

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Research Highlight

Flipping the superconductivity switch

© ROBERT BROOK/SCIENCE PHOTO LIBRARY/Getty

© ROBERT BROOK/SCIENCE PHOTO LIBRARY/Getty

Scientists have developed a new technique for turning superconductivity on and off, paving the way for new electronic and magnetic devices, according to a study published in Physical Review Letters.

Below certain temperatures iron-based superconductors can conduct electricity with virtually zero resistance, and exhibit superconducting and magnetic behaviours at the same time. Scientists, however, still lack detailed understanding of the complex atomic-level properties that underlie this behaviour.    

Led by researchers from the Korea Advanced Institute of Science and Technology, a team of physicists from South Korea and the United States have used a spin-polarized scanning tunnelling microscope to pass a metal tip just a few atoms wide over the surface of an iron-based superconductor, allowing them to probe its magnetic and electronic properties to be turned on and off.

The work could lead to new memory devices and transistors that can control superconductivity.

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  1. Phys Rev Lett, 119, 227001 (2017). doi: 10.1103/physrevlett.119.227001
Institutions Share
Korea Advanced Institute of Science and Technology (KAIST), South Korea 0.32
Division of Physics, IBS, South Korea 0.11
Yonsei University, South Korea 0.07
Pohang University of Science and Technology (POSTECH), South Korea 0.07
Columbia University in the City of New York (CU), United States of America (USA) 0.07
Seoul National University (SNU), South Korea 0.07
Rutgers, The State University of New Jersey (RU), United States of America (USA) 0.07
Chonnam National University, South Korea 0.07
The University of Tennessee at Knoxville (UTK), United States of America (USA) 0.07
Center for Quantum Nanoscience, IBS, South Korea 0.04
Ewha Womans University (Ewha), South Korea 0.04

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