University of Cambridge > Talks.cam > Quantum Matter Seminar > Possible field-induced superconductivity in the quasi-1D purple bronze Li0.9Mo6O17

Possible field-induced superconductivity in the quasi-1D purple bronze Li0.9Mo6O17

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I will present results of a magnetotransport study on single crystals of the quasi-one-dimensional molybdenum oxide Li0.9Mo6O17 that is perhaps the most the highly anisotropic metallic compound known to exist. Li0.9Mo6O17 is metallic at room temperature, semiconducting below a temperature Tmin = 25 K, and in clean crystals becomes superconducting below Tc = 1.8 K. Applying a sufficiently large magnetic field in all orientations in the insulating state below Tmin gives rise to a large negative magnetoresistance that is most pronounced when the field is aligned along the most conductive direction. In this orientation, a magnetic field above 24T is enough to completely suppress the low temperature insulating state, that leads to a recovery of the metallic state before, at the highest fields (45T), onset to a possible superconducting state at 10K. This onset critical temperature is almost an order of magnitude higher than ever previously reported for this material in zero field.

This talk is part of the Quantum Matter Seminar series.

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