Zobrazeno 1 - 10
of 212
pro vyhledávání: '"Koshibae, W."'
Publikováno v:
npj Spintronics 1, 1 (2023)
Spatially varying magnetic textures can exhibit electric-current-induced dynamics as a result of the spin-transfer torque effect. When such a magnetic system is electrically driven, an electric field is generated, which is called the emergent electri
Externí odkaz:
http://arxiv.org/abs/2305.16123
Autor:
Seki, S., Suzuki, M., Ishibashi, M., Takagi, R., Khanh, N. D., Shiota, Y., Koshibae, W., Tokura, Y., Ono, T.
Magnetic skyrmion, i.e. a topologically stable swirling spin texture, appears as a particle-like object in the two-dimensional (2D) systems, and has recently attracted attention as a candidate of novel information carrier. In the real three-dimension
Externí odkaz:
http://arxiv.org/abs/2102.05556
Autor:
Kagawa, F., Oike, H., Koshibae, W., Kikkawa, A., Okamura, Y., Taguchi, Y., Nagaosa, N., Tokura, Y.
Publikováno v:
Nat. Commun. 8: 1332 (2017)
In the MnSi bulk chiral magnet, magnetic skyrmion strings of 17 nm in diameter appear in the form of a lattice, penetrating the sample thickness, 10-1,000 um. Although such a bundle of skyrmion strings may exhibit complex soft-matter-like dynamics wh
Externí odkaz:
http://arxiv.org/abs/1711.03286
Autor:
Matsuno, J., Ogawa, N., Yasuda, K., Kagawa, F., Koshibae, W., Nagaosa, N., Tokura, Y., Kawasaki, M.
Publikováno v:
Sci. Adv. 2, e1600304 (2016)
Electron transport coupled with magnetism has attracted attention over the years as exemplified in anomalous Hall effect due to a Berry phase in momentum space. Another type of unconventional Hall effect -- topological Hall effect, originating from t
Externí odkaz:
http://arxiv.org/abs/1607.07536
Autor:
Mochizuki, M., Yu, X. Z., Seki, S., Kanazawa, N., Koshibae, W., Zang, J., Mostovoy, M., Tokura, Y., Nagaosa, N.
Publikováno v:
Nature Materials 13, 241-246 (2014)
Spontaneously emergent chirality is an issue of fundamental importance across the natural sciences. It has been argued that a unidirectional (chiral) rotation of a mechanical ratchet is forbidden in thermal equilibrium, but becomes possible in system
Externí odkaz:
http://arxiv.org/abs/1504.05860
Magnetic skyrmion, a swirling spin texture, in chiral magnets is characterized by (i) nano-scale size ($\sim$1nm -- 100nm), (ii) topological stability, and (iii) gyro-dynamics. These features are shown to be advantageous for (a) high-density data-sto
Externí odkaz:
http://arxiv.org/abs/1501.07650
Publikováno v:
J. Phys.: Condens. Matter 26, 255702 (2014)
A magnetic domain wall (DW) behaves as a massive particle with elasticity. Sliding and oscillation of the DW have been observed experimentally, whereas vibration of a width in the DW, "breathing mode", has not been measured so far. We theoretically p
Externí odkaz:
http://arxiv.org/abs/1310.3906
Publikováno v:
JPS Conf. Proc. 3, 017014 (2014)
Temperature dependence of thermopower in the multiorbital Hubbard model is studied by using the dynamical mean-field theory with the non-crossing approximation impurity solver. It is found that the Coulomb interaction, the Hund coupling, and the crys
Externí odkaz:
http://arxiv.org/abs/1308.0416
Autor:
Motohashi, T., Sugimoto, Y., Masubuchi, Y., Sasagawa, T., Koshibae, W., Tohyama, T., Yamauchi, H., Kikkawa, S.
Publikováno v:
Phys. Rev. B 83, 195128 (2011)
Thermoelectric properties of the layered cobalt oxide system LixCoO2 were investigated in a wide range of Li composition, 0.98 >= x >= 0.35. Single-phase bulk samples of LixCoO2 were successfully obtained through electrochemical deintercalation of Li
Externí odkaz:
http://arxiv.org/abs/1104.2419
Publikováno v:
Phys. Rev. B 84, 153107 (2011)
We examine the temperature dependence of thermopower in the single band Hubbard model using dynamical mean-field theory. The strong Coulomb interaction brings about the coherent-to-incoherent crossover as temperature increases. As a result, the therm
Externí odkaz:
http://arxiv.org/abs/1104.2119