E. M. Dizhur, M. A. Il'ina, S. V. Zaitsev-Zotov, “Metal-insulator transition in whiskers of the NbS$_3$ quasi-one-dimensional conductor under pressure”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2007, Volume 86, Issue 2,Pages <nobr>141

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CONDENSED MATTER

Metal-insulator transition in whiskers of the NbS$_3$ quasi-one-dimensional conductor under pressure

E. M. Dizhur^a, M. A. Il'ina^a, S. V. Zaitsev-Zotov^b

^a Institute for High Pressure Physics, Russian Academy of Sciences
^b Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences

Abstract: The effect of pressure on the conduction of the NbS₃ quasi-one-dimensional conductor is studied. A pressure-induced insulator-metal transition is observed. The transition is accompanied by an increase in conductivity by six orders of magnitude at room temperature. Under pressures of 3–4 GPa, an additional phase transition appears in the temperature dependences of resistance. This transition manifests itself in an increase in the local conduction activation energy. The quantity dln(R)/d(1/T) reaches its maximum under pressures of 4–5 GPa, and the temperature position of the maximum of dln(R)/d(1/T) depends on the pressure as T* ≈ 7.5P + 202 K.

PACS: 71.45.-d, 72.15.Nj

Received: 06.06.2007