Pressure-induced metal-insulator transition in the filled skutterudite PrFe4P12

Hiroyuki Hidaka, Ikuma Ando, Hisashi Kotegawa, Tatsuo C. Kobayashi, Hisatomo Harima, Miki Kobayashi, Hitoshi Sugawara, and Hideyuki Sato
Phys. Rev. B 71, 073102 – Published 9 February 2005

Abstract

We have studied the electrical resistivity of the filled skutterudite compound PrFe4P12 under high pressure. The antiferroquadrupolar ordering temperature TQ decreases monotonically with increasing pressure up to 2.4GPa. Above 2.4GPa, we have found that a metal-insulator (MI) transition appears. The insulating state is easily suppressed by a magnetic field. The observed Kondo effect and a field-induced heavy-fermion state at high pressure suggest that the quadrupolar interactions survive in the insulating region. The quadrupolar interactions might play an essential role in the MI transition. PrFe4P12 is an unusual compound in that it shows a pressure-induced transition from a metal to an insulator.

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  • Received 21 October 2004

DOI:https://doi.org/10.1103/PhysRevB.71.073102

©2005 American Physical Society

Authors & Affiliations

Hiroyuki Hidaka1, Ikuma Ando2, Hisashi Kotegawa1, Tatsuo C. Kobayashi1, Hisatomo Harima3, Miki Kobayashi4, Hitoshi Sugawara5, and Hideyuki Sato4

  • 1Department of Physics, Okayama University, Okayama 700-8530, Japan
  • 2Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
  • 3Department of Physics, Kobe University, Nada, Kobe 657-8501, Japan
  • 4Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
  • 5Faculty of Integrated Arts and Sciences, Tokushima University, Tokushima 770-8502, Japan

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Issue

Vol. 71, Iss. 7 — 15 February 2005

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