The alignment pattern of nematic superconductivity has been successfully controlled

In consumer liquid-crystal displays, “nematic” liquid-crystals, in which bar-shaped molecules align along a certain direction, are utilized. Configuration of this molecular alignment can be controlled by an applied voltage, to change the light transparency of each pixel. Recently, “nematic superconductivity”, which is analogous to nematic liquid-crystals, has been discovered. Superconductivity, the phenomenon characterized by the […]

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Magnetic-Field Dependence of Novel Gap Behavior Related to the Quantum-Size Effect

195Pt-NMR measurements of Pt nanoparticles with a mean diameter of 4.0 nm were performed in a high magnetic field of approximately μ0H=23.3 T to investigate the low-temperature electronic state of the nanoparticles. The characteristic temperature T∗, below which the nuclear spin-lattice relaxation rate 1/T1 deviates from the relaxation rate of the bulk, shows a magnetic-field dependence. This dependence supports the […]

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Long magnetic penetration depth observed in Sr3−xSnO

Antiperovskite oxide superconductor Sr3−xSnO was measured by a method called muon spin rotation (μSR). It became clear that the magnetic field penetration depth is abnormally long. Sr3−xSnO is a superconductor discovered in our laboratory in 2016. It is the first superconductor in the antiperovskite oxide, and the possibility of topological superconductivity has been theoretically proposed. […]

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First virtual QM welcome party

We had the first online party of our research group! It was a quite different experience, but we had drinks and food together. The new members introduced themselves and took the chance to tell us something about their hometown and interests. We discovered that Zhongyu Yu is originally from Harbin, a city in the north […]

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“Diamagnetic” signals can appear due to localised heating

Magnetic differential measurements In order to perform magnetisation measurements, it is usually necessary to put a sample onto a sample holder. If the holder magnetization is exactly zero, it is straightforward to extract the sample magnetisation. However, it is practically impossible to bring the holder magnetisation completely to zero. Thus, it is common to use […]

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Discovery of superconductivity in CaSb2

In CaSb2 , the calcium and antimony atoms are arranged in a special arrangement called “non-conformal”. Since atoms are arranged periodically in a crystal, if one atom moves in parallel so that it overlaps with the next atom, other atoms also overlap with the next atom, resulting in the same structure as the original. I will. In addition to […]

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Variation in Superconducting Symmetry with Pressure on a Noncentrosymmetric Superconductor

We performed 185/187Re nuclear quadrupole resonance (NQR) measurements under pressure to investigate the superconducting properties of noncentrosymmetric superconductor Cd2Re2O7 under various crystal structures. The pressure dependence of superconducting transition temperature Tc determined through ac susceptibility measurements is consistent with the results of previous resistivity measurements [Kobayashi et al., J. Phys. Soc. Jpn. 80, 023715 (2011)]. Below 2.2 GPa, in the nuclear […]

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