2024-03-28T12:58:08Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00007157
2023-01-16T03:52:29Z
320:321:322
Unified Origin for the 3D Magnetism and Superconductivity in NaxCoO2
Kuroki, Kazuhiko
Ohkubo, Shuhei
Nojima, Takumi
Arita, Ryotaro
Onari, Seiichiro
Tanaka, Yukio
open access
Copyright: American Physical Society, All rights reserved.
We analyze the origin of the three-dimensional (3D) magnetism observed in nonhydrated Na-rich NaxCoO2 within an itinerant spin picture using a 3D Hubbard model. The origin is identified as the 3D nesting between the inner and outer portions of the Fermi surface, which arise due to the local minimum structure of the a_1g band at the Γ-A line. The calculated spin wave dispersion strikingly resembles the neutron scattering result. We argue that this 3D magnetism and the spin fluctuations responsible for superconductivity in the hydrated systems share essentially the same origin.
American Physical Society
2007-03
eng
journal article
VoR
http://hdl.handle.net/2237/8833
https://nagoya.repo.nii.ac.jp/records/7157
https://doi.org/10.1103/PhysRevLett.98.136401
0031-9007
PHYSICAL REVIEW LETTERS
98
13
136401
136401
https://nagoya.repo.nii.ac.jp/record/7157/files/PhysRevLett_98-136401.pdf
application/pdf
416.4 kB
2018-02-19