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Large, non-saturating magnetoresistance in WTe2.

Mazhar N Ali1, Jun Xiong2, Steven Flynn1

  • 1Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.

Nature
|September 16, 2014

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View abstract on PubMed

Summary

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  • Engineering
  • Materials Engineering
  • Wearable Materials
  • Large, Non-saturating Magnetoresistance In Wte2.
    • This summary is machine-generated.

    Researchers discovered an extremely large positive magnetoresistance in WTe2, a non-magnetic material. This finding offers new possibilities for magnetic sensors and fundamental studies in materials physics.

    Area of Science:

    • Materials Physics
    • Condensed Matter Physics

    Background:

    • Magnetoresistance, the change in electrical resistance due to a magnetic field, is crucial for magnetic sensors and data storage.
    • Large magnetoresistance materials are rare, driving research in low-temperature physics.

    Purpose of the Study:

    • To report the observation of exceptionally high positive magnetoresistance in WTe2.
    • To investigate the potential of WTe2 for novel electronic applications.

    Main Methods:

    • Experimental measurement of electrical resistance in WTe2 under varying low temperatures and high magnetic fields.
    • Characterization of the magnetoresistance effect in a non-magnetic layered transition-metal dichalcogenide.

    Main Results:

    • Observed an unprecedented positive magnetoresistance of 452,700% at 4.5 K (14.7 T) and 13 million% at 0.53 K (60 T) in WTe2.
    • The magnetoresistance showed no saturation even at extremely high magnetic fields.

    Conclusions:

    • WTe2 exhibits an extraordinary magnetoresistance effect at low temperatures.
    • This discovery opens new avenues for research in magnetoresistivity and the development of advanced magnetic sensor technologies.

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