Publications (16)
Establishment of a stable vortex state in the peak effect region in a weakly pinned superconductor CeRu_2
A. A. Tulapurkar, D. Heidarian, S. Sarkar +7
We present magnetization data on a weakly pinned CeRu_2 single crystal showing the existence of a stable state of the vortex lattice in the peak effect region. The stable state is…
Unconventional superconductivity and normal state properties of epsilon-iron at high pressure
A. T. Holmes, D. Jaccard, G. Behr +2
Following the discovery of superconductivity in epsilon-iron, subsequent experiments hinted at non-Fermi liquid behaviour of the normal phase and sensitive dependence of the superc…
Exotic Heavy Fermion State in the Filled Skutterudite PrFeP Uncovered by the de Haas-van Alphen Effect
H. Sugawara, T. D. Matsuda, K. Abe +6
We report the de Haas-van Alphen (dHvA) experiment on the filled skutterudite PrFeP exhibiting apparent Kondo-like behaviors in the transport and thermal properties. We…
Spin Triplet Superconducting State due to Broken Inversion Symmetry in Li_2Pt_3B
M. Nishiyama, Y. Inada, Guo-qing Zheng
We report ^{11}B and ^{195}Pt NMR measurements in non-centrosymmetric superconductor Li_2Pt_3B. We find that the spin susceptibility measured by the Knight shift remains unchanged…
Superconductivity in Tetragonal LaPt_{2-x}Ge_{2+x}
S. Maeda, K. Matano, H. Sawaoka +2
We find that a tetragonal CaBe_2Ge_2-type structure can be stabilized in non-stoichiometric LaPt_{2-x}Ge_{2+x}. We further discovered that tetragonal LaPt_{2-x}Ge_{2+x} with x=0.15…
Abrupt enhancement of non-centrosymmetry and appearance of the spin-triplet superconducting state in Li_2(Pd_{1-x}Pt_{x})_3B beyond x=0.8
S. Harada, J. J. Zhou, Y. G. Yao +2
We report synthesis, ^{195}Pt, ^{11}B and ^{7}Li NMR measurements, and first-principle band calculation for non-centrosymmetric superconductors Li_{2}(Pd_{1-x}Pt_{x})_{3}B (x=0, 0.…
Fermi surface of the filled-skutterudite superconductor LaRu4P12: A clue to the origin of the metal-insulator transition in PrRu4P12
S. R. Saha, H. Sugawara, Y. Aoki +6
We report the de Haas-van Alphen (dHvA) effect and magnetoresistance in the filled-skutterudite superconductor LaRu4P12, which is a reference material of PrRu4P12 that exhibits a m…
Superconductivity of the Ternary Boride Li_2Pd_3B Probed by ^{11}B NMR
M. Nishiyama, Y. Inada, Guo-qing Zheng
We report a ^{11}B NMR measurement on the recently discovered superconductor Li_2Pd_3B. The nuclear spin lattice relaxation rate 1/T_1 shows a well-defined coherence peak just belo…
Superconductivity of epsilon-Fe: complete resistive transition
D. Jaccard, A. T. Holmes, G. Behr +2
Last year, iron was reported to become superconducting at temperatures below 2K and pressures between 15 and 30 GPa. The evidence presented was a weak resistivity drop, suppressed…
Influence on superconductivity in the parity mixing superconductor Li2T3B(T:Pt,Pd) by non-magnetic impurity and defect doping
G. Baoa, Y. Inada, G. Eguchi +3
Superconductors with noncentrosymmetric crystal structures such as Li2T3B(T:Pd,Pt) have been the focus of in-depth research with their parity mixing nature. In this study, we focus…
Probing the extended non-Fermi liquid regimes of MnSi and Fe
P. Pedrazzini, D. Jaccard, G. Lapertot +4
Recent studies show that the non-Fermi liquid (NFL) behavior of MnSi and Fe spans over an unexpectedly broad pressure range, between the critical pressure p_c and around 2p_c. In o…
Magnetic Phase Diagram of Li_2(Pd_{1-x}Pt_x)_3B by AC Susceptometry
D. C. Peets, G. Eguchi, M. Kriener +5
The H-T phase diagram and several superconducting parameters for Li_2(Pd_{1-x}Pt_x)_3B have been determined as a function of cation substitution x. Notably, the coherence length ma…
Superconducting gap and pair breaking in CeRu2 studied by point contacts
A. V. Moskalenko, Yu. G. Naidyuk, I. K. Yanson +5
The superconducting gap in a CeRu single crystal is investigated by point contacts. BCS-like behavior of the gap in the temperature range below TT, wher…
Phonon anomaly and anisotropic superconducting gap in non-centrosymmetric Li2(Pd1-xPtx)3B
G. Eguchi, D. C. Peets, M. Kriener +6
We report the systematic investigation of the specific heat of the noncentrosymmetric supercon- ductor Li2(Pd1-xPtx)3B as a function of x. There is a large deviation of the phononi…
First application of mass measurement with the Rare-RI Ring reveals the solar r-process abundance trend at A=122 and A=123
H. F. Li, S. Naimi, T. M. Sprouse +41
The Rare-RI Ring (R3) is a recently commissioned cyclotron-like storage ring mass spectrometer dedicated to mass measurements of exotic nuclei far from stability at Radioactive Iso…
Fermi surface of the heavy fermion superconductor PrOsSb
H. Sugawara, S. Osaki, S. R. Saha +8
We have investigated the de Haas-van Alphen effect in the Pr-based heavy fermion superconductor PrOsSb.The topology of Fermi surface is close to the reference compound L…