Abstract
We examine the validity of Fermi-liquid theory in the low-density two-dimensional Hubbard model. From the ground-state energy we obtain the quasiparticle energy and the Landau interaction function. Then we prove that the quasiparticle-interaction function is finite and that the quasiparticle residue is nonzero for repulsive interactions. We also find, as a function of the excitation energy ε, that the quasiparticle lifetime ∼1/ ε2lnε. Hence, we conclude that Fermi-liquid theory holds in our model.
| Original language | English |
|---|---|
| Pages (from-to) | 10567-10570 |
| Number of pages | 4 |
| Journal | Physical Review B |
| Volume | 48 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 1993 |
| Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics
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Yarlagadda, S., & Kurihara, S. (1993). Fermi-liquid theory in the low-density two-dimensional Hubbard model. Physical Review B, 48(14), 10567-10570. https://doi.org/10.1103/PhysRevB.48.10567