Directional field-induced metallization of quasi-one-dimensional Li0.9Mo6O17

We report a detailed magnetotransport study of the highly anisotropic quasi-one-dimensional oxide Li(0.9)Mo(6)O(17) whose in-chain electrical resistivity diverges below a temperature T_{min} approximately 25 K. For T < T_{min}, a magnetic field applied parallel to the conducting chain induces a l...

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Veröffentlicht in:Physical review letters 2009-05, Vol.102 (20), p.206602-206602
Hauptverfasser: Xu, Xiaofeng, Bangura, A F, Analytis, J G, Fletcher, J D, French, M M J, Shannon, N, He, J, Zhang, S, Mandrus, D, Jin, R, Hussey, N E
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Sprache:eng
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Zusammenfassung:We report a detailed magnetotransport study of the highly anisotropic quasi-one-dimensional oxide Li(0.9)Mo(6)O(17) whose in-chain electrical resistivity diverges below a temperature T_{min} approximately 25 K. For T < T_{min}, a magnetic field applied parallel to the conducting chain induces a large negative magnetoresistance and, ultimately, the recovery of a metallic state. We show evidence that this insulator-metal crossover is a consequence of field-induced suppression of a density-wave gap in a highly one-dimensional conductor. At the highest fields studied, there is evidence for the possible emergence of a novel superconducting state with an onset temperature T_{c} > 10 K.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.102.206602