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Magnetic pairing of charge carriers in doped Mott insulators

✍ Scribed by N. Kumar


Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
824 KB
Volume
88
Category
Article
ISSN
0022-4596

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Charge dynamics in doped Mott insulators
✍ Masanori Kohno; Xiao Hu; Masashi Tachiki πŸ“‚ Article πŸ“… 2004 πŸ› Elsevier Science 🌐 English βš– 413 KB

Charge dynamics in the two-dimensional Hubbard model is investigated by quantum Monte Carlo simulations. We find that dielectric function ðq; xÞ becomes negative at finite frequencies for U =t ¼ 4 with hole density d ¼ 0:15. Numerical results indicate that vertex corrections enhance charge fluctuati