1,943 research outputs found
Crystallographic and superconducting properties of the fully-gapped noncentrosymmetric 5d-electron superconductors CaMSi3 (M=Ir, Pt)
We report crystallographic, specific heat, transport, and magnetic properties
of the recently discovered noncentrosymmetric 5d-electron superconductors
CaIrSi3 (Tc = 3.6 K) and CaPtSi3 (Tc = 2.3 K). The specific heat suggests that
these superconductors are fully gapped. The upper critical fields are less than
1 T, consistent with limitation by conventional orbital depairing. High,
non-Pauli-limited {\mu}0 Hc2 values, often taken as a key signature of novel
noncentrosymmetric physics, are not observed in these materials because the
high carrier masses required to suppress orbital depairing and reveal the
violated Pauli limit are not present.Comment: 8 pages, 8 figure
Large spin-orbit splitting and weakly-anisotropic superconductivity revealed with single-crystalline noncentrosymmetric CaIrSi3
We report normal and superconducting properties of the Rashba-type
noncentrosymmetric com- pound CaIrSi3, using single crystalline samples with
nearly 100% superconducting volume fraction. The electronic density of states
revealed by the hard x-ray photoemission spectroscopy can be well explained by
the relativistic first-principle band calculation. This indicates that strong
spin-orbit interaction indeed affects the electronic states of this compound.
The obtained H - T phase diagram exhibits only approximately 10% anisotropy,
indicating that the superconducting properties are almost three dimensional.
Nevertheless, strongly anisotropic vortex pinning is observed.Comment: 8 pages, 6 figures, 1 table, accepted for publication in Phys. Rev.
Quantitative analysis of the kinematics of the foot during gait with respect to barefoot running shoes using a Multi-Segment Foot Model
Kinematics of the foot during static and dynamic tasks are technically challenging to accurately measure, making it difficult to evaluate their contribution to running-related injuries. Motion capture can detect changes in running mechanics, such as with differing footwear. Habitual barefoot runners and/habitual minimalist shoe runners underwent a biomechanical evaluation of their foot movement during running using reflective markers and optical motion capture. A five-segment foot model was used to compare motions between the different parts of the foot while running barefoot and wearing Vibram Five Fingers™ (VFF) barefoot mimicking shoes. Supination/pronation in the forefoot was larger but not significant between habitual shod and habitual VFF runners. In contrast, the other foot motions (forefoot spreading/rising, hindfoot pronation/supination and hindfoot adduction/abduction) were not significantly different between the groups of runners. Therefore it could be possible that transitioning from a regular running shoe to a barefoot mimicking minimalist shoe would cause the foot to adopt a more supinated gait cycle
The Properties of Specific Binding Site of 125I-Radioiodinated Myotoxin α, a Novel Ca++ Releasing, agent in Skeletal Muscle Sarcoplasmic Reticulum
開始ページ、終了ページ: 冊子体のページ付
Elastic properties of the Non-Fermi liquid metal and the Dense Kondo semiconductor
We have investigated the elastic properties of the Ce-based filled
skutterudite antimonides CeRuSb and CeOsSb by means
of ultrasonic measurements. CeRuSb shows a slight increase around
130 K in the temperature dependence of the elastic constants ,
(-)/2 and . No apparent softening toward low
temperature due to a quadrupolar response of the 4-electronic ground state
of the Ce ion was observed at low temperatures. In contrast CeOsSb
shows a pronounced elastic softening toward low temperature in the longitudinal
as a function of temperature () below about 15 K, while a slight
elastic softening was observed in the transverse below about 1.5 K.
Furthermore, CeOsSb shows a steep decrease around a phase
transition temperature of 0.9 K in both and. The elastic
softening observed in below about 15 K cannot be explained
reasonably only by the crystalline electric field effect. It is most likely to
be responsible for the coupling between the elastic strain and the
quasiparticle band with a small energy gap in the vicinity of Fermi level. The
elastic properties and the 4 ground state of Ce ions in CeRuSb
and CeOsSb are discussed from the viewpoint of the crystalline
electric field effect and the band structure in the vicinity of Fermi level.Comment: 9 pages, 11 figures, regular pape
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