Charge dynamics in the two-dimensional Hubbard model is investigated by quantum Monte Carlo simulations. We find that dielectric function Γ°q; xΓ becomes negative at finite frequencies for U =t ΒΌ 4 with hole density d ΒΌ 0:15. Numerical results indicate that vertex corrections enhance charge fluctuati
Ultrafast charge dynamics in organic one-dimensional Mott insulators
β Scribed by H. Uemura; H. Matsuzaki; Y. Takahashi; T. Hasegawa; H. Okamoto
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 663 KB
- Volume
- 405
- Category
- Article
- ISSN
- 0921-4526
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