𝔖 Bobbio Scriptorium
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Flat bands in topological media

✍ Scribed by T. T. Heikkilä; N. B. Kopnin; G. E. Volovik


Book ID
110169763
Publisher
SP MAIK Nauka/Interperiodica
Year
2011
Tongue
English
Weight
510 KB
Volume
94
Category
Article
ISSN
0021-3640

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Robustness of the ferromagnetism in flat
✍ Koichi Kusakabe; Hideo Aoki 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 167 KB

Ferromagnetism in the Hubbard models having flat bands proposed by Mielke and by Tasaki is shown to survive even when the bands become dispersive in a finite region in the phase diagram against Hubbard U and the band parameter. The charge gap in the excitation spectrum and a finite spin stiffness in