TY - JOUR
T1 - Pressure-induced metal-insulator transition in the filled skutterudite PrFe 4P 12
AU - Hidaka, Hiroyuki
AU - Ando, Ikuma
AU - Kotegawa, Hisashi
AU - Kobayashi, Tatsuo C.
AU - Harima, Hisatomo
AU - Kobayashi, Miki
AU - Sugawara, Hitoshi
AU - Sato, Hideyuki
PY - 2005/2
Y1 - 2005/2
N2 - We have studied the electrical resistivity of the filled skutterudite compound PrFe 4P 12 under high pressure. The antiferroquadrupolar ordering temperature T Q decreases monotonically with increasing pressure up to 2.4 GPa. Above 2.4 GPa, we have found that a metal-insulator (M-I) 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 M-I transition. PrFe 4P 12 is an unusual compound in that it shows a pressure-induced transition from a metal to an insulator.
AB - We have studied the electrical resistivity of the filled skutterudite compound PrFe 4P 12 under high pressure. The antiferroquadrupolar ordering temperature T Q decreases monotonically with increasing pressure up to 2.4 GPa. Above 2.4 GPa, we have found that a metal-insulator (M-I) 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 M-I transition. PrFe 4P 12 is an unusual compound in that it shows a pressure-induced transition from a metal to an insulator.
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U2 - 10.1103/PhysRevB.71.073102
DO - 10.1103/PhysRevB.71.073102
M3 - Article
AN - SCOPUS:15744362053
SN - 1098-0121
VL - 71
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 7
M1 - 073102
ER -