271 citations · 1.8k across the 30 of their papers we have counts for
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Pressure suppression of unconventional charge-density-wave state in PrRu4P12 studied by optical conductivity
H. Okamura, N. Ohta, A. Takigawa +12
Optical conductivity s(w) 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 s(w) at am…
Unusual Field-Insensitive Phase Transition and Kondo Behavior in SmTiAl
Ryuji Higashinaka, Takuya Maruyama, Akihiro Nakama +3
Magnetization, electrical resistivity and specific heat measurements were performed on high-quality single crystalline SmTiAl (residual resistivity ratio 40) grow…
f-Electron-Nuclear Hyperfine-Coupled Multiplets in the Unconventional Charge Order Phase of Filled Skutterudite PrRu4P12
Yuji Aoki, Takahiro Namiki, Shanta R. Saha +6
In the unconventional f-electron-associated charge order phase of filled skutterudite PrRu4P12, the low-temperature behaviors of the triplet crystalline-electric-field ground state…
Optical Conductivity and Electronic Structure of CeRu4Sb12 under High Pressure
H. Okamura, R. Kitamura, M. Matsunami +6
Optical conductivity [s(w)] of Ce-filled skutterudite CeRu4Sb12 has been measured at high pressure to 8 GPa and at low temperature, to probe the pressure evolution of its electroni…
Low-lying excitations at the rare-earth site due to rattling motion in the filled skutterudite LaOs_4Sb_{12} revealed by ^{139}La NMR and ^{121/123}Sb NQR
Yusuke Nakai, Kenji Ishida, Hitoshi Sugawara +2
We report experimental results of nuclear magnetic resonance (NMR) at the La site and nuclear quadrupole resonance (NQR) at the Sb site in the filled skutterudite LaOsSb…
Superconducting properties of Pr-based Filled skutterudite PrRuAs
T. Namiki, Y. Aoki, H. Sato +5
We report on systematic study of superconducting characteristics and Pr crystalline-electric-field (CEF) levels of filled-skutterudite \pra ( = 2.33 K). The temperature…
Elastic properties of the Non-Fermi liquid metal and the Dense Kondo semiconductor
Yoshiki Nakanishi, Tomoyuki Kumagai, Masafumi Oikawa +4
We have investigated the elastic properties of the Ce-based filled skutterudite antimonides CeRuSb and CeOsSb by means of ultrasonic measurements. CeRu$_{…
Universal scaling in the dynamical conductivity of heavy fermion Ce and Yb compounds
H. Okamura, T. Watanabe, M. Matsunami +9
Dynamical conductivity spectra s(w) have been measured for a diverse range of heavy-fermion (HF) Ce and Yb compounds. A characteristic excitation peak has been observed in the mid-…
Evidence for s-wave superconductivity with antiferromagnetic fluctuations in filled skutterudite LaFeP: La and P-NMR studies
Y. Nakai, K. Ishida, D. Kikuchi +2
We have performed La,P-NMR studies on a filled skutterudite superconductor LaFeP with a critical temperature K. In the normal state, the prese…
Sb-NQR probe for multipole degree of freedom in the first Pr-based heavy-fermion superconductor PrOsSb
Hideki Tou, Masahiro Doi, Masafumi Sera +4
We report Sb nuclear quadrupole resonance (NQR) measurements in the filled-skutterudite superconductor PrOsSb in the temperature range of 0.05-30 K. The elec…
Novel Phase Transition Near the Quantum Critical Point in the Filled-Skutterudite Compound CeOs4Sb12: an Sb-NQR Study
Mamoru Yogi, Hisashi Kotegawa, Guo-qing Zheng +4
We report on a novel phase transition at = 0.9 K in the Ce-based filled-skutterudite compound CeOsSb via measurements of the nuclear-spin lattice relaxation rate $…
Role of p-f Hybridization in the Metal-Non-Metal Transition of PrRu4P12
Kazuaki Iwasa, Lijie Hao, Tomoo Hasegawa +10
Electronic state evolution in the metal-non-metal transition of PrRu4P12 has been studied by X-ray and polarized neutron diffraction experiments. It has been revealed that, in the…
Evolution of 4f-Electron States in the Metal-Insulator Transition of PrRuP
Kazuaki Iwasa, Lijie Hao, Keitaro Kuwahara +7
Magnetic excitations of the filled skutterudite PrRu4P12 exhibiting a metal-insulator (M-I) transition at TM-I= 63 K were studied by inelastic neutron scattering experiment. The sp…
Quadrupolar effect and rattling motion in heavy fermion superconductor PrOs_4Sb_{12}
Terutaka Goto, Yuichi Nemoto, Kazuhiro Sakai +7
The elastic properties of a filled skutterudite PrOs_4Sb_{12} with a heavy Fermion superconductivity at T_C=1.85 K have been investigated. The elastic softening of (C_{11}-C_{12})/…
Thermodynamical Study on the Heavy-Fermion Superconductor PrOs4Sb12: Evidence for Field-Induced Phase Transition
Y. Aoki, T. Namiki, S. Ohsaki +3
We report measurements of low-temperature specific heat on the 4f^2-based heavy-fermion superconductor PrOs4Sb12. In magnetic fields above 4.5 T in the normal state, distinct anoma…
Magnetic, thermal, and transport properties on single crystals of antiferromagnetic Kondo-lattice Ce2PdSi3
S. R. Saha, H. Sugawara, T. D. Matsuda +3
Magnetization, heat capacity, electrical resistivity, thermoelectric power, and Hall effect have been investigated on single-crystalline Ce_2PdSi_3. This compound is shown to order…
Magnetic anisotropy, first-order-like metamagnetic transitions and large negative magnetoresistance in the single crystal of GdPdSi
S. R. Saha, H. Sugawara, T. D. Matsuda +3
Electrical resistivity (), magnetoresistance (MR), magnetization, thermopower and Hall effect measurements on the single crystal GdPdSi, crystallizing in an AlB-de…
Specific Heat Study of Non-Fermi Liquid Behavior in CeNi_2Ge_2: Anomalous Peak in Quasi-Particle Density-of-States
Yuji Aoki, Jun Urakawa, Hitoshi Sugawara +3
To investigate the non-Fermi liquid (NFL) behavior in a nonalloyed system CeNi_2Ge_2, we have measured the temperature and field dependences of the specific heat C on a CeNi_2Ge_2…