- Tytuł:
- Quantum Criticality Due to the Topological Effects in the Hubbard Model
- Autorzy:
- Kopeć, T. K.
- Powiązania:
- https://bibliotekanauki.pl/articles/2047311.pdf
- Data publikacji:
- 2007-04
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
74.20.Fg
71.10.Pm - Opis:
- We argue that in a strongly correlated electron system collective instanton excitations of the phase field (dual to the charge) arise with a great degree of stability, governed by gauge flux changes by an integer multiple of 2π. By unraveling consequences of the nontrivial topology of the charge gauge U(2) group, we found that the pinning of the chemical potential and the zero-temperature divergence of charge compressibility define a novel "hidden" quantum criticality on verge of the Mott transition governed by the protectorate of stable topological numbers rather than the Landau paradigm of the symmetry breaking.
- Źródło:
-
Acta Physica Polonica A; 2007, 111, 4; 527-536
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł