Zobrazeno 1 - 10
of 104
pro vyhledávání: '"Michikazu Kobayashi"'
Publikováno v:
Physical Review Research, Vol 2, Iss 1, p 013081 (2020)
The modified XY model is a variation of the XY model extended by a half-period term, exhibiting a rich phase structure. As the Goldstone model, also known as the linear O(2) model, can be obtained as a continuum and regular model for the XY model, we
Externí odkaz:
https://doaj.org/article/6f2f4ea7569a44d8b7bd45fb10b16006
Autor:
Michikazu Kobayashi, Muneto Nitta
Publikováno v:
Physical Review C. 107
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f53cee2f07c08712c64eb1ce982450b5
https://doi.org/10.1103/physrevc.107.045801
https://doi.org/10.1103/physrevc.107.045801
Autor:
Michikazu Kobayashi, Muneto Nitta
Publikováno v:
Physical Review C. 105
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03ef7f5942735efb2f022fa5a16712ae
https://doi.org/10.1103/physrevc.105.035807
https://doi.org/10.1103/physrevc.105.035807
Autor:
Michikazu Kobayashi, Muneto Nitta
Publikováno v:
Physical Review A. 104
We clarify a relation between the Gross-Pitaevskii energy functional for spin-2 spinor Bose-Einstein condensates and the Ginzburg-Landau theory for neutron $^{3}P_{2}$ superfluidis (spin-triplet $P$-wave pairing with total angular momentum two). We t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab578005637c92a62fbf717bdf54c8c7
https://doi.org/10.1103/physreva.104.053302
https://doi.org/10.1103/physreva.104.053302
Autor:
Takahito Takeda, Takayuki Muro, Kohsei Araki, Y. Zhang, Chia-Hsiu Hsu, Kohei Yamagami, Hiroki Wadati, Yasuhiro Niimi, Yoshinori Okada, Benjamin Driesen, Kazuaki Kuroda, Yukiharu Takeda, Michikazu Kobayashi, Yuita Fujisawa, K. Kawaguchi, Feng-Chuan Chuang, T. Kondo, Hajime Tanaka
Publikováno v:
Physical Review B. 103
We investigate near-Fermi-energy (${E}_{F}$) element-specific electronic and spin states of ferromagnetic van der Waals (vdW) metal ${\mathrm{Fe}}_{5}\mathrm{Ge}{\mathrm{Te}}_{2}$. The soft x-ray angle-resolved photoemission spectroscopy (SX-ARPES) m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9b3b6e14eaafd2243a2d21766b915fe
https://doi.org/10.1103/physrevb.103.l060403
https://doi.org/10.1103/physrevb.103.l060403
Autor:
Muneto Nitta, Michikazu Kobayashi
Publikováno v:
Physical Review
The modified XY model is a modification of the XY model by the addition of a half-periodic term. The modified Goldstone model is a regular and continuum version of the modified XY model. The former admits a vortex molecule, that is, two half-quantize
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a68bc4b37afdb2d29e501d6056307b4e
http://repo.scoap3.org/api
http://repo.scoap3.org/api
Publikováno v:
Physical Review Letters. 123
We study the Berezinskii-Kosterlitz-Thouless (BKT) transition of two-component Bose mixtures in two spatial dimensions. When phases of both components are decoupled, half-quantized vortex-antivortex pairs of each component induce two-step BKT transit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a95b6da933522bb18cf8d91f1ad9b0fb
https://doi.org/10.1103/physrevlett.123.075303
https://doi.org/10.1103/physrevlett.123.075303
Publikováno v:
Physical Review C. 100
The Ginzburg-Landau (GL) effective theory is a useful tool to study a superconductivity or superfluidity near the critical temperature, and usually the expansion up to the fourth-order in terms of order parameters is sufficient for the description of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66376ad4f3fe388a40094829d6473820
https://doi.org/10.1103/physrevc.100.025204
https://doi.org/10.1103/physrevc.100.025204
Autor:
K. Koshiishi, Chun-Liang Lin, Bin Gao, K. Hagiwara, S. Nakata, Yuxuan Wan, Kanta Ono, Sungmo Kang, S. W. Cheong, Jaeshim Yu, Michikazu Kobayashi, Seungjin Kang, A. Fujimori, Hiroshi Kumigashira, Masuo Suzuki
Publikováno v:
Physical Review B. 99
In order to investigate the electronic properties of the semiconducting van der Waals ferromagnet $\mathrm{C}{\mathrm{r}}_{2}\mathrm{G}{\mathrm{e}}_{2}\mathrm{T}{\mathrm{e}}_{6}$ (CGT), where ferromagnetic layers are bonded through van der Waals forc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9fe0882a41a9b8f9d3ec80a5c3a145b
https://doi.org/10.1103/physrevb.99.161401
https://doi.org/10.1103/physrevb.99.161401
Autor:
Michikazu Kobayashi
We numerically study the Berezinskii-Kosterlitz-Thouless (BKT) transition of a spin-1 spinor Bose gas under the quadratic Zeeman effect. A calculation of the mass and spin superfluid densities shows that (i) the BKT transition occurs only when vortic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b3c9b5510bd35fb0591e5bc10fb92c7a
http://arxiv.org/abs/1902.00210
http://arxiv.org/abs/1902.00210
