Simultaneous collapse of antiferroquadrupolar order and superconductivity in PrIr2Zn20 by nonhydrostatic pressure

Kazunori Umeo; Riho Takikawa; Takahiro Onimaru; Makoto Adachi; Keisuke T. Matsumoto; Toshiro Takabatake

doi:10.1103/PhysRevB.102.094505

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Simultaneous collapse of antiferroquadrupolar order and superconductivity in PrIr2Zn20 by nonhydrostatic pressure

Kazunori Umeo, Riho Takikawa, Takahiro Onimaru, Makoto Adachi, Keisuke T. Matsumoto, Toshiro Takabatake

DOI 10.1103/PhysRevB.102.094505 · Physical Review B

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Abstract

Superconductivity in PrIr2Zn20 appears at Tc=0.05 K in the presence of an antiferroquadrupolar order below TQ=0.11 K. We have studied pressure dependences of Tc, TQ, and non-Fermi-liquid behaviors in the resistivity ρ(T) by using two pressure-transmitting media: argon, maintaining highly hydrostatic pressure, and glycerol, which solidifies above 5 GPa, producing nonhydrostatic pressure. Upon applying P with argon up to 10.6 GPa, Tc hardly changes, while TQ monotonically increases from 0.11 to 0.23 K. With glycerol, however, TQ and Tc simultaneously fall below 0.04 K at 6.3 GPa. The contrasting results indicate that on-site quadrupolar fluctuations induce superconductivity in this compound.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
PrIr2Zn20 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.05	Pressure unresolved	onset
PrIr2Zn20 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.05	10.6 GPa	onset
PrRh2Zn20 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.06	Pressure not reported	unknown
PrTi2Al20 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.2	Pressure not reported	unknown
PrOs4Sb12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.85	Pressure not reported	unknown
LaIr2Zn20 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.6	Pressure unresolved	onset