867 research outputs found
Anomalous Transport through the p-Wave Superconducting Channel in the 3-K Phase of Sr2RuO4
Using micro fabrication techniques, we extracted individual channels of
3-Kelvin (3-K) phase superconductivity in Sr2RuO4-Ru eutectic systems and
confirmed odd-parity superconductivity in the 3-K phase, similar to pure
Sr2RuO4. Unusual hysteresis in the differential resistance-current and
voltage-current characteristics observed below 2 K indicates the internal
degrees of freedom of the superconducting state. A possible origin of the
hysteresis is current-induced chiral-domain-wall motion due to the chiral
p-wave state.Comment: 4 pages, 5 figures, accepted for publication in Phys. Rev. Let
Cavity optomechanical mass sensor in water with sub-femtogram resolution
Sub-femtogram resolution of an in-liquid cavity optomechanical mass sensor
based on the twin-microbottle glass resonator is demonstrated. An evaluation of
the frequency stability using an optomechanical phase-locked loop reveals that
this cavity optomechanical sensor has the highest mass resolution of
g in water, which is four orders of magnitude
better than that in our first-generation setup [Sci. Adv. 8, eabq2502 (2022)].
This highly sensitive mass sensor provides a free-access optomechanical probe
in liquid and could thus be extended to a wide variety of in-situ chemical and
biological metrology applications
Specific Heats of Fe-Ni (fcc) Alloys at High Temperature
Specific heats at constant pressure, C_p, of Fe-Ni (fcc) alloys have been measured a temperatures 300~1000 K. For alloys containing more than 50%Ni, the C_p-T curve shows a sharp λ-type peak at ferromagnetic Curie temperature. For the alloys less in concentration of nickel, however, only a dull peak is observed. The C_p-T curve is analyzed using the values of thermal expansion coefficient and of compressibility measured on the same conditions, separating the magnetic contribution from total specific heats
Quadrature skyrmions in two-dimensionally arrayed parametric resonators
Skyrmions are topological solitons in two-dimensional systems and have been
observed in various physical systems. Generating and controlling skyrmions in
artificial resonator arrays lead to novel acoustic, photonic, and electric
devices, but it is a challenge to implement a vector variable with the chiral
exchange interaction. Here, we propose to use quadrature variables, where their
parametric coupling enables skyrmions to be stabilized. A finite-element
simulation indicates that a stable acoustic skyrmion would exist in a realistic
structure consisting of a piezoelectric membrane array.Comment: 22 pages, 10 figure
Measuring Instant Light-Response Curve of Chlorophyll Fluorescence in Sago Palm (Metroxylon sagu Rottb.) Leaves: Different Time Measurements on Dark and Light-Adapted Leaf
This study aimed to determine the appropriate time for the chlorophyll fluorescence light curve measurement in sago palms and to avoid high values variations. The photosynthetic status of three-year-old sago palm seedlings was evaluated through the chlorophyll fluorescence measurement. The chlorophyll fluorescence light curve of measurement was evaluated under different daytime measurements. Observations on DFm/Fm’ and ETR vs. irradiances were conducted on sago palm leaves in the morning, midday, and afternoon with light and dark adaptation. The highest ETRmax value was found under a light-adapted leaf; however, the Eopt value could not be obtained. Morning time measurement on the dark-adapted leaf is the most appropriate method and time to get an Eopt value with high ETRmax
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