Spintronics Research Network of Japan

Coulomb Blockade in Graphene Nano-islands Formed by Direct CVD Growth on Si/SiO 2 Substrate

Graphene nano-islands (GNIs) are promising building blocks for quantum devices owing to their unique potential. However, direct electrical measurements of GNIs have been challenging due to the requirement of metal catalysts in typical synthesis methods. In this study, we demonstr...

Ultra-fast spin Hall nano-oscillator based microwave spectral analysis

Abstract Ultra-fast spectrum analysis based on rapidly tuned spintronic nano-oscillators has been under development for the last few years and has already demonstrated promising results. Here, we demonstrate an ultra-fast microwave spectrum analyzer based on a chain of five mutua...

Crystallographic Spin‐Orbit Torque From Epitaxial CrSb

ABSTRACT Altermagnets (AMs) represent an emerging magnetic phase that combines compensated antiferromagnetic order with ferromagnet‐like spin‐splitting, offering a new route for efficient spin‐current generation. Here, we experimentally demonstrate spin‐torque generation in epita...

Theoretical Analysis of Photon Detection Mechanism in Superconducting Single-Photon Detectors

To elucidate the photon detection mechanism of superconducting single-photon detectors, we theoretically examine the dynamics of type-II superconductors with a bias current using the two-dimensional time-dependent Ginzburg–Landau and the Maxwell equations. The photon injection th...

Time-resolved imaging of antiferromagnetic skyrmion interactions

Abstract Quantifying particle interactions is central to understanding and controlling collective dynamics in particle-based devices such as those comprising skyrmion ensembles. Here we directly visualize, in real time, the nanosecond current-driven dynamics of an antiferromagnet...