H
Hideaki Takayanagi
Researcher at Tokyo University of Science
Publications - 252
Citations - 7038
Hideaki Takayanagi is an academic researcher from Tokyo University of Science. The author has contributed to research in topics: Superconductivity & Josephson effect. The author has an hindex of 36, co-authored 249 publications receiving 6720 citations. Previous affiliations of Hideaki Takayanagi include Nippon Telegraph and Telephone & Niigata University.
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Andreev reflection at the superconductor-two-dimensional-electron-gas interface by a quantum point contact.
TL;DR: The differential resistance-voltage characteristics show a clear change from current-deficit to excess-current characteristics, attributed to the Andreev-reflected holes being focused on the quantum point contact defined in the 2DEG by the split gate.
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Kink effect in an InAs inserted-channel InAlAs/InGaAs inverted HEMT at low temperature
TL;DR: In this paper, the authors investigated the kink effect in an InAs-inserted-channel InAlAs/InGaAs inverted HEMT at low temperature and found that at low drain voltages, the suppression of the drain current due to an increase in the source access resistance and at higher drain voltage, the holes generated by impact ionization.
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Spin injection across a hybrid heterojunction: Theoretical understanding and experimental approach (invited)
C. M. Hu,C. M. Hu,J. Nitta,Ane Jensen,Jørn Hansen,Hideaki Takayanagi,Toru Matsuyama,Detlef Heitmann,Ulrich Merkt +8 more
TL;DR: In this article, a spin-injection-detection experiment was performed on devices with two ferromagnetic contacts on a two-dimensional electron gas confined in an InAs quantum well, and the spin injection allowed the hybrid device to combine both the advantage of the ferromagnet as well as that of the semiconductor.
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Double sine-Gordon fluxons in isolated long Josephson junctions
TL;DR: In this paper, the authors investigated the fluxon dynamics in isolated long Josephson junctions and found that the fluxons obey a double sine-Gordon (DSG) equation based on the change in the Josephson acceleration relation, i.e., the voltage-phase difference relation.
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Temperature dependence of the critical current in a clean-limit superconductor-2DEG-superconductor junction
TL;DR: In this article, the temperature dependence of the superconducting critical current Ic is studied for a newly fabricated three-terminal Josephson junction coupled with a two-dimensional electron gas (2DEG) which satisfies the clean-limit condition l > ξN (where l is the mean free path and ξ n is the normal coherence length of the semiconductor).