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- The University of TokyoJP245 papers
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81 papers · 1 filter
Spatial gradient of dynamic nuclear spin polarization induced by breakdown of quantum Hall effect
Minoru Kawamura, Kimitoshi Kono, Yoshiaki Hashimoto +2
We studied spatial distribution of dynamic nuclear polarization (DNP) in a Hall-bar device in a breakdown regime of the quantum Hall effect (QHE). We detected nuclear magnetic reso…
Enhanced Logic Performance with Semiconducting Bilayer Graphene Channels
Song-Lin Li, Hisao Miyazaki, Hidefumi Hiura +2
Realization of logic circuits in graphene with an energy gap (EG) remains one of the main challenges for graphene electronics. We found that large transport EGs (>100 meV) can be f…
Magnetoelectric coupling at the interface of BiFeO3/La0.7Sr0.3MnO3 multilayers
M. J. Calderon, S. Liang, R. Yu +6
Electric-field controlled exchange bias in a heterostructure composed of the ferromagnetic manganite La0.7Sr0.3MO3 and the ferroelectric antiferromagnetic BiFeO3 has recently been…
Numerical analysis of a reinforcement learning model with the dynamic aspiration level in the iterated Prisoner's Dilemma
Naoki Masuda, Mitsuhiro Nakamura
Humans and other animals can adapt their social behavior in response to environmental cues including the feedback obtained through experience. Nevertheless, the effects of the expe…
Photoinduced coherent oscillations in the one-dimensional two-orbital Hubbard model
Nobuya Maeshima, Ken-ichi Hino, Kenji Yonemitsu
We study photoinduced ultrafast coherent oscillations originating from orbital degrees of freedom in the one-dimensional two-orbital Hubbard model. By solving the time-dependent Sc…
Extremely long quasiparticle spin lifetimes in superconducting aluminium using MgO tunnel spin injectors
Hyunsoo Yang, See-Hun Yang, Saburo Takahashi +2
There has been an intense search in recent years for long-lived spin-polarized carriers for spintronic and quantum-computing devices. Here we report that spin polarized quasi-parti…