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A filled skutterudite, La$_{0.5}$Rh$_4$Sb$_{12}$, with a lattice constant of 9.284(2) {\AA} was synthesized using a high-pressure technique. The electrical resistivity showed semiconducting behavior and the energy gap was estimated to be…

Materials Science · Physics 2015-07-07 S. Ibuka , M. Imai , M. Miyakawa , T. Taniguchi

The optical conductivity [$\sigma(\omega)$] spectra of alkaline-earth-filled skutterudites with the chemical formula $A^{2+}M_{4}$Sb$_{12}$ ($A$ = Sr, Ba, $M$ = Fe, Ru, Os) and a reference material La$^{3+}$Fe$_{4}$Sb$_{12}$ were obtained…

Strongly Correlated Electrons · Physics 2009-11-13 Shin-ichi Kimura , Hojun Im , Takafumi Mizuno , Shota Narazu , Eiichi Matsuoka , Toshiro Takabatake

Magnetization, magnetoresistance, and magnetodielectric measurements have been carried out on the half doped charge ordered manganite, Pr_0.5Ca_0.5MnO_3. The low temperature state is found to be strongly dependent on the oxygen…

Strongly Correlated Electrons · Physics 2009-04-29 A. Karmakar , S. Majumdar , A. K. Singh , S. Patnaik , S. Giri

Filled skutterudite compounds have gained attention recently as an innovative platforms for studying intriguing low-temperature superconducting properties. Regarding the symmetry of the superconducting gap, contradicting findings from…

Superconductivity · Physics 2023-07-11 A. Bhattacharyya , D. T. Adroja , A. D. Hillier , P. K. Biswas

Characteristics of hybridization and multipole orders of $4f$-electrons in Pr skutterudites are explained in terms of a pseudo-quartet composed of crystalline electric field (CEF) singlet and the triplet. It is shown that the contrasting…

Strongly Correlated Electrons · Physics 2015-06-25 Yoshio Kuramoto , Annamaria Kiss , Junya Otsuki , Hiroaki Kusunose

Recently the superconducting gap functions of the skutterudite PrOs$_4$Sb$_{12}$ have been proposed [K. Maki et al, Europhys. Lett. {\bf 68}, 720 (2004)]. The superconductivity is spin-triplet and consists of at least 2 distinct phases in a…

Superconductivity · Physics 2007-05-23 David Parker , Kazumi Maki , Stephan Haas

We use neutron scattering to study the Pr$^{3+}$ crystalline electric field (CEF) excitations in the filled skutterudite PrOs$_4$As$_{12}$. By comparing the observed levels and their strengths under neutron excitation with the theoretical…

Strongly Correlated Electrons · Physics 2008-10-22 Songxue Chi , Pengcheng Dai , T. Barnes , H. J. Kang , J. W. Lynn , R. Bewley , F. Ye , M. B. Maple , Z. Henkie , A. Pietraszko

We present the specific heat, magnetization, optical spectroscopy measurements and the firstprinciple calculations on the Weberite structure Ca2Os2O7 single crystal/polycrystalline sample. The Ca2Os2O7 shows a Curie-Weiss nature at high…

Strongly Correlated Electrons · Physics 2015-06-11 P. Zheng , Y. G. Shi , Q. S. Wu , G. Xu , T. Dong , Z. G. Chen , R. H. Yuan , B. Cheng , K. Yamaura , J. L. Luo , N. L. Wang

We have measured the specific heat of PrV$_2$Al$_{20}$ at very low temperatures, using high quality single crystals with the residual resistivity ratio ~ 20. The high-quality single crystals exhibit clear double transitions at $T_{\rm Q} =$…

Strongly Correlated Electrons · Physics 2015-06-23 Masaki Tsujimoto , Yosuke Matsumoto , Satoru Nakatsuji

We present polar Kerr effect measurements of the filled skutterudite superconductor PrOs$_4$Sb$_{12}$. Simultaneous AC susceptibility measurements allow us to observe the superconducting transition under the influence of heating from the…

Superconductivity · Physics 2018-05-09 E. M. Levenson-Falk , E. R. Schemm , Y. Aoki , M. B. Maple , Aharon Kapitulnik

We report $^{123}$Sb nuclear quadrupole resonance (NQR) measurements of the filled skutterudite heavy-fermion superconductor PrOs$_4$Sb$_{12}$ under high pressures of 1.91 and 2.34 GPa. The temperature dependence of NQR frequency and the…

Theoretical account is given of 4f-electron dynamics and multipole orders in Pr skutterudites with particular attention to (i) mechanism of the crystalline electric field (CEF) splitting leading to a pseudo-quartet ground state;(ii) Kondo…

Strongly Correlated Electrons · Physics 2009-11-11 Y. Kuramoto , J. Otsuki , A. Kiss , H. Kusunose

The equiatomic PrGe single crystal was grown by Czochralski pulling method. The grown single crystal was found to have CrB-type orthorhombic crystal structure with the space group \textit{Cmcm} (#63). Transport and magnetization data reveal…

Strongly Correlated Electrons · Physics 2012-10-30 Pranab Kumar Das , K. Ramesh Kumar , R. Kulkarni , S. K. Dhar , A. Thamizhavel

We studied in detail the low temperature/high magnetic field phases of URu$_{2}$Si$_{2}$ single crystals with specific heat, magnetocaloric effect, and magnetoresistance in magnetic fields up to 45 T. Data obtained down to 0.5 K, and…

Strongly Correlated Electrons · Physics 2009-11-07 M. Jaime , K. H. Kim , G. Jorge , S. McCall , J. A Mydosh

Motivated by current research efforts towards exploring the interplay between magnetism and superconductivity in multiband electronic systems, we have investigated the effects of Eu substitution through thermodynamic measurements on the…

Strongly Correlated Electrons · Physics 2018-08-22 R. B. Adhikari , D. L. Kunwar , I. Jeon , M. B. Maple , M. Dzero , C. C. Almasan

A comprehensive experimental and theoretical study of the low temperature properties of GdCoIn$_5$ was performed. Specific heat, thermal expansion, magnetization and electrical resistivity were measured in good quality single crystals down…

We investigated the magnetic phase diagram of the first Pr-based heavy fermion superconductor PrOs4Sb12 by means of high-resolution dc magnetization measurements in low temperatures down to 0.06K. The temperature dependence of the…

Superconductivity · Physics 2009-11-10 T. Tayama , T. Sakakibara , H. Sugawara , Y. Aoki , H. Sato

Using finite-temperature phonon calculations and machine-learning methods, we calculate the mechanical stability of about 400 semiconducting oxides and fluorides with cubic perovskite structures at 0 K, 300 K and 1000 K. We find 92…

Materials Science · Physics 2017-02-10 Ambroise van Roekeghem , Jesús Carrete , Corey Oses , Stefano Curtarolo , Natalio Mingo

Neutron powder diffraction measurements, combined with magnetization and resistivity data, have been carried out in the doped perovskite La$_{1-x}$Ca$_x$MnO$_3$ ($x=0.47$, 0.50, and 0.53) to elucidate the structural, magnetic, and…

Strongly Correlated Electrons · Physics 2009-10-31 Q. Huang , J. W. Lynn , R. W. Erwin , A. Santoro , D. C. Dender , V. N. Smolyaninova , K. Ghosh , R. L. Greene

Doping of the band insulator FeS$_2$ with Co on the Fe site introduces a small density of itinerant carriers and magnetic moments. The lattice constant, AC and DC magnetic susceptibility, magnetization, and specific heat have been measured…

Strongly Correlated Electrons · Physics 2015-05-14 S. Guo , D. P. Young , R. T. Macaluso , D. A. Browne , N. L. Henderson , J. Y. Chan , L. L. Henry , J. F. DiTusa