過去のセミナー
- 日時
- 10月1日 (水), 13:30-
- 場所
- 京都大学理学部 5号館 413
- 講演者
- Robert Peters 氏
- Goettingen ドイツ (GCOE双方向プログラム招聘大学院生)
- タイトル
- The Hubbard Model on the Bethe lattice with next-nearest-neighbor-hopping
- 備考欄 （アブストラクト等）
We study the interplay between N\'eel-antiferromagnetism and the paramagnetic metal-insulator-transition (PMIT) on a Bethe lattice with nearest and next-nearest neighbor hopping. For $t_2/t_1\rightarrow 1$ the PMIT outgrows the antiferromagnetic phase and for this strong frustration we also observe a novel magnetic phase. Away from half-filling, we can see the existence of a ferromagnetic phase, which is not present in the model without next-nearest-neighbor-hopping.