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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Electronic instability in bismuth far beyond the quantum limit

Benoît Fauqué1, Baptiste Vignolle2, Cyril Proust2, Jean-Paul Issi3 and Kamran Behnia1

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We present a transport study of semi-metallic bismuth in the presence of a magnetic field applied along the trigonal axis extended to 55 T for electric conductivity and to 45 T for thermoelectric response. The results uncover a new field scale at about 40 T in addition to the previously detected ones. Large anomalies in all transport properties point to an intriguing electronic instability deep in the ultraquantum regime. Unexpectedly, both the sheer magnitude of conductivity and its metallic temperature dependence are enhanced by this instability.


PACS

72.15.Jf Thermoelectric and thermomagnetic effects

72.15.Eb Electrical and thermal conduction in crystalline metals and alloys

Subjects

Condensed matter: electrical, magnetic and optical

Dates

Issue 11 (November 2009)

Received 16 October 2009

Published 6 November 2009



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