Pressure suppression of unconventional charge-density-wave state in PrRu4P12 studied by optical conductivity

被引：4

作者：

Okamura, H. ^{[1
]}

Ohta, N. ^{[1
]}

Takigawa, A. ^{[1
]}

Matsutori, I. ^{[1
]}

Shoji, K. ^{[1
]}

Miyata, K. ^{[1
]}

Matsunami, M. ^{[1
]}

Nanba, T. ^{[1
]}

Sugawara, H. ^{[1
]}

Sekine, C. ^{[2
]}

Shirotani, I. ^{[2
]}

Sato, H. ^{[3
]}

Moriwaki, T. ^{[4
,5
]}

Ikemoto, Y. ^{[4
,5
]}

Liu, Z. ^{[6
]}

Carr, G. L. ^{[7
]}

机构：

[1] Kobe Univ, Grad Sch Sci, Dept Phys, Kobe, Hyogo 6578501, Japan

[2] Muroran Inst Technol, Dept Elect & Elect Engn, Muroran, Hokkaido 0508585, Japan

[3] Tokyo Metropolitan Univ, Grad Sch Sci, Hachioji, Tokyo 1920397, Japan

[4] Japan Synchrotron Radiat Res Inst, Sayo 6795198, Japan

[5] SPring 8, Sayo 6795198, Japan

[6] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA

[7] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 20期

关键词：

METAL-INSULATOR-TRANSITION; F HYBRIDIZATION; FERMI-SURFACE; SKUTTERUDITE; SPECTROSCOPY; DYNAMICS; BL43IR;

D O I：

10.1103/PhysRevB.85.205116

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Optical conductivity [sigma(omega)] of PrRu4P12 has been studied under high pressure to 14 GPa, at low temperatures to 8 K, and at photon energies 12 meV-1.1 eV. The energy gap in sigma(omega) at ambient pressure, caused by a metal-insulator transition due to an unconventional charge-density-wave formation at 63 K, is gradually filled in with increasing pressure to 10 GPa. At 14 GPa and below 30 K, sigma(omega) exhibits a pronounced Drude-type component due to free carriers. This indicates that the initial insulating ground state at zero pressure has been turned into a metallic one at 14 GPa. This is consistent with a previous resistivity study under pressure, where the resistivity rapidly decreased with cooling below 30 K at 14 GPa. The evolution of electronic structure with pressure is discussed in terms of the hybridization between the 4f and conduction electrons.

引用

页数：7

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