Zobrazeno 1 - 10
of 699
pro vyhledávání: '"Kozuka, Y."'
Autor:
Niaouris, Vasileios, Durnev, Mikhail V., Linpeng, Xiayu, Viitaniemi, Maria L. K., Zimmermann, Christian, Vishnuradhan, Aswin, Kozuka, Y., Kawasaki, M., Fu, Kai-Mei C.
We present an experimental and theoretical study of the longitudinal electron spin relaxation ($T_1$) of shallow donors in the direct band-gap semiconductor ZnO. $T_1$ is measured via resonant excitation of the Ga donor-bound exciton. $T_1$ exhibits
Externí odkaz:
http://arxiv.org/abs/2111.11564
Autor:
Kozuka, Y., Isogami, S., Masuda, K., Miura, Y., Das, Saikat, Fujioka, J., Ohkubo, T., Kasai, S.
Publikováno v:
Phys. Rev. Lett. 126, 236801 (2021)
Spin-charge conversion via spin-orbit interaction is one of the core concepts in the current spintronics research. The efficiency of the interconversion between charge and spin current is estimated based on Berry curvature of Bloch wavefunction in th
Externí odkaz:
http://arxiv.org/abs/2105.03574
Autor:
矢木, 修, YAGI, O., 米澤, 範俊, YONEZAWA, N., 西川, 陽子, NISHIKAWA, Y., 河江, 綾子, KAWAE, A., 原, 順子, HARA, J., 米津, 香, YONEZU, K., 石川, 佐智, ISHIKAWA, S., 小塚, 陽子, KOZUKA, Y., 飯島, 幸久, IZIMA, Y., 川田, 基生, KAWATA, M., 薫森, 英夫, SHIGEMORI, H., 鈴木, 善晴, SUZUKI, Y.
Externí odkaz:
http://hdl.handle.net/2237/12774
Autor:
Maryenko, D., Kawamura, M., Ernst, A., Dugaev, V. K., Sherman, E. Ya., Kriener, M., Bahramy, M. S., Kozuka, Y., Kawasaki, M.
Spin-orbit coupling (SOC) is pivotal for various fundamental spin-dependent phenomena in solids and their technological applications. In semiconductors, these phenomena have been so far studied in relatively weak electron-electron interaction regimes
Externí odkaz:
http://arxiv.org/abs/2010.02461
Autor:
Tabrea, D., Dmitriev, I. A., Dorozhkin, S. I., Gorshunov, B. P., Boris, A. V., Kozuka, Y., Tsukazaki, A., Kawasaki, M., von Klitzing, K., Falson, J.
Publikováno v:
Phys. Rev. B 102, 115432 (2020)
We present an experimental study on microwave illuminated high mobility MgZnO/ZnO based two-dimensional electron systems with different electron densities and, hence, varying Coulomb interaction strength. The photoresponse of the low-temperature dc r
Externí odkaz:
http://arxiv.org/abs/2006.13627
Publikováno v:
Phys. Rev. B 99, 161111 (2019)
We report large enhancement of upper critical field Hc2 observed in superconducting Sr2RuO4 thin films. Through dimensional crossover approaching two dimensions, Hc2 except the in-plane field direction is dramatically enhanced compared to bulks, foll
Externí odkaz:
http://arxiv.org/abs/1903.08630
Autor:
Hou, H., Kozuka, Y., Liao, Jun-Wei, Smith, L. W., Kos, D., Griffiths, J. P., Falson, J., Tsukazaki, A., Kawasaki, M., Ford, C. J. B.
Oxide heterostructures are versatile platforms with which to research and create novel functional nanostructures. We successfully develop one-dimensional (1D) quantum-wire devices using quantum point contacts on MgZnO/ZnO heterostructures and observe
Externí odkaz:
http://arxiv.org/abs/1903.03476
Autor:
Nishihaya, S., Uchida, M., Nakazawa, Y., Akiba, K., Kriener, M., Kozuka, Y., Miyake, A., Taguchi, Y., Tokunaga, M., Kawasaki, M.
Publikováno v:
Physical Review B 97, 245103 (2018)
The newly discovered topological Dirac semimetals host the possibilities of various topological phase transitions through the control of spin-orbit coupling as well as symmetries and dimensionalities. Here, we report a magnetotransport study of high-
Externí odkaz:
http://arxiv.org/abs/1806.02302
Autor:
Falson, J., Tabrea, D., Zhang, D., Sodemann, I., Kozuka, Y., Tsukazaki, A., Kawasaki, M., von Klitzing, K., Smet, J. H.
Publikováno v:
Science Advances 4, eaat8742 (2018)
Half-filled Landau levels host an emergent Fermi-liquid which displays an instability towards pairing, culminating in a gapped even-denominator fractional quantum Hall ground state. While this pairing may be probed by tuning the polarization of carri
Externí odkaz:
http://arxiv.org/abs/1804.04565
Autor:
Linpeng, Xiayu, Viitaniemi, Maria L. K., Vishnuradhan, Aswin, Kozuka, Y., Johnson, Cameron, Kawasaki, M., Fu, Kai-Mei C.
Publikováno v:
Phys. Rev. Applied 10, 064061 (2018)
Defects in crystals are leading candidates for photon-based quantum technologies, but progress in developing practical devices critically depends on improving defect optical and spin properties. Motivated by this need, we study a new defect qubit can
Externí odkaz:
http://arxiv.org/abs/1802.03483