Separating electric field and thermal effects across the metal-insulator transition in vanadium oxide nanobeams
We present results from an experimental study of the equilibrium and non-equilibrium transport properties of vanadium oxide nanobeams near the metal-insulator transition (MIT). Application of a large electric field in the insulating phase across the nanobeams produces an abrupt MIT, and the individu...
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Veröffentlicht in: | Applied physics letters 2015-07, Vol.107 (1) |
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Hauptverfasser: | , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | We present results from an experimental study of the equilibrium and non-equilibrium transport properties of vanadium oxide nanobeams near the metal-insulator transition (MIT). Application of a large electric field in the insulating phase across the nanobeams produces an abrupt MIT, and the individual roles of thermal and non-thermal effects in driving the transition are studied. Transport measurements at temperatures (T) far below the critical temperature (Tc) of MIT, in nanoscale vanadium oxide devices, show that both T and electric field play distinctly separate, but critical roles in inducing the MIT. Specifically, at T≪Tc, electric field dominates the MIT through an avalanche-type process, whereas thermal effects become progressively critical as T approaches Tc. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.4926334 |