Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Yuma Okuyama"'
Autor:
Chihiro KAMIDAKI, Yuma OKUYAMA, Tatsuo KUBO, Wooram LEE, Caglar OZDAG, Bodhisatwa SADHU, Yo YAMAGUCHI, Ning GUAN
Publikováno v:
IEICE Transactions on Electronics.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70fd9b1dddec05ec7a9fa008f58cf16e
https://doi.org/10.1587/transele.2023mmi0003
https://doi.org/10.1587/transele.2023mmi0003
Publikováno v:
2022 Asia-Pacific Microwave Conference (APMC).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd8ffca71d5f447041df8be00cb34ed7
https://doi.org/10.23919/apmc55665.2022.10000001
https://doi.org/10.23919/apmc55665.2022.10000001
Autor:
Chihiro Kamidaki, Yuma Okuyama, Tatsuo Kubo, Wooram Lee, Caglar Ozdag, Bodhisatwa Sadhu, Yo Yamaguchi, Ning Guan
Publikováno v:
2022 Asia-Pacific Microwave Conference (APMC).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3866751d1037f0fe8b355beace55920
https://doi.org/10.23919/apmc55665.2022.9999941
https://doi.org/10.23919/apmc55665.2022.9999941
Autor:
Yuma Okuyama, Bodhisatwa Sadhu, Sudipto Chakraborty, Alberto Valdes-Garcia, Masayuki Yoshiyama, Wooram Lee, Yo Yamaguchi, Caglar Ozdag, Mark Yeck, Arun Paidimarri, Jean-Olivier Plouchart
Publikováno v:
2021 IEEE Radio Frequency Integrated Circuits Symposium (RFIC).
Phased array antenna modules can benefit from splitting beamforming and frequency-conversion functions between different ICs to enable scalability, configurability and Si area efficiency. This work introduces a frequency-conversion IC that features a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e19f5c72db0d55ff42ef0ad420528329
https://doi.org/10.1109/rfic51843.2021.9490413
https://doi.org/10.1109/rfic51843.2021.9490413
Autor:
Toru Hirahara, Mika Kobayashi, Evgueni V. Chulkov, Kazuki Sumida, S. Ideta, Tetsuroh Shirasawa, Yuma Okuyama, Satoru Ichinokura, Yukiharu Takeda, Mikhail M. Otrokov, Sergey V. Eremeev, Y. Tomohiro, Shinji Kuroda, S. Kusaka, Kenta Amemiya, Taichi Okuda, Koji Miyamoto, Takayoshi Sasaki, Kiyohisa Tanaka, Kazuhiro Hono
Publikováno v:
Nature Communications
Digital.CSIC. Repositorio Institucional del CSIC
instname
Nature Communications, Vol 11, Iss 1, Pp 1-8 (2020)
Addi: Archivo Digital para la Docencia y la Investigación
Universidad del País Vasco
Addi. Archivo Digital para la Docencia y la Investigación
Digital.CSIC. Repositorio Institucional del CSIC
instname
Nature Communications, Vol 11, Iss 1, Pp 1-8 (2020)
Addi: Archivo Digital para la Docencia y la Investigación
Universidad del País Vasco
Addi. Archivo Digital para la Docencia y la Investigación
Materials that possess nontrivial topology and magnetism is known to exhibit exotic quantum phenomena such as the quantum anomalous Hall effect. Here, we fabricate a novel magnetic topological heterostructure Mn4Bi2Te7/Bi2Te3 where multiple magnetic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6130576ee307e975d8f0d7460877e45e
https://pubmed.ncbi.nlm.nih.gov/32973165
https://pubmed.ncbi.nlm.nih.gov/32973165
Autor:
Kiyohisa Tanaka, Yuya Sugiyama, Thomas Greber, Toru Hirahara, Carlo Bernard, Yuma Okuyama, S. Ideta
Publikováno v:
Surface Science. 672:33-38
We have deposited Sn on corrugated hexagonal boron nitride (h-BN) nanomeshs formed on Rh(111) and found that Sn atoms are intercalated between h-BN and Rh, flattening the h-BN. Our reflection high-energy electron diffraction (RHEED) analysis showed t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::339a484e96b97aaee51ed160e439b377
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100777835
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100777835
Publikováno v:
Applied Surface Science. 398:125-129
We have grown tellurium (Te) thin films on Bi2Te3 and investigated the atomic structure. From low-energy electron diffraction (LEED) measurements, we found that the Te films are [101¯0]-oriented with six domains. A detailed analysis of the reflectio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b007b971ef18eb50b3cd53b3e362941
https://doi.org/10.1016/j.apsusc.2016.11.196
https://doi.org/10.1016/j.apsusc.2016.11.196
Autor:
Tetsuya Hajiri, Kazuki Sumida, Ryosuke Nakanishi, Evgueni V. Chulkov, Takayuki Kubo, Shin-ichi Kimura, Toru Hirahara, Shin Ichiro Ideta, Ryota Akiyama, Masaharu Matsunami, Yuma Okuyama, Akari Takayama, Koji Miyamoto, Tetsuroh Shirasawa, Kiyohisa Tanaka, Sergey V. Eremeev, Toshihiko Yokoyama, Yasumasa Takagi, Taichi Okuda, Shuji Hasegawa
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
Inducing magnetism into topological insulators is intriguing for utilizing exotic phenomena such as the quantum anomalous Hall effect (QAHE) for technological applications. While most studies have focused on doping magnetic impurities to open a gap a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::96b3ca04674b320aba225646d78470de
http://arxiv.org/abs/1709.02004
http://arxiv.org/abs/1709.02004
Publikováno v:
Applied Physics Letters. 114:051602
We fabricated MnBi2Se4/(n − 1) quintuple layer (QL) Bi2Se3 magnetic topological heterostructures (n = 1–6) and measured the Dirac cone dispersion with angle-resolved photoemission spectroscopy. We observed a clear gap opening for films with n = 2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba65cb9e6666254c812ae8a36f3df5fd
https://doi.org/10.1063/1.5083059
https://doi.org/10.1063/1.5083059