Dimensional reduction and odd-frequency pairing of the checkerboard-lattice hubbard model at 1/4-filling

Yuki Yanagi, Yasufumi Yamashita, Kazuo Ueda

研究成果: Article査読

10 被引用数 (Scopus)

抄録

The ferromagnetism of the checkerboard-lattice Hubbard model at quarter filling is one of the few exact ferromagnetic ground states known in the family of Hubbard models. When the nearest neighbor hopping, t1, is negligible compared with the second neighbor one, t2, the system reduces to a collection of Hubbard chains. We find that the 1D character is surprisingly robust as long as t1 < t2. This phenomenon of dimensional reduction due to the geometrical frustration leads to peculiar magnetic orders with 1D character for intermediate U and is responsible for odd-frequency superconducting states close to the magnetic boundary.

本文言語English
論文番号123701
ジャーナルjournal of the physical society of japan
81
12
DOI
出版ステータスPublished - 2012 12
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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